{"pageNumber":"1095","pageRowStart":"27350","pageSize":"25","recordCount":46734,"records":[{"id":70023842,"text":"70023842 - 2002 - Investigating landslides caused by earthquakes - A historical review","interactions":[],"lastModifiedDate":"2012-03-12T17:20:04","indexId":"70023842","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3503,"text":"Surveys in Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Investigating landslides caused by earthquakes - A historical review","docAbstract":"Post-earthquake field investigations of landslide occurrence have provided a basis for understanding, evaluating, and mapping the hazard and risk associated with earthquake-induced landslides. This paper traces the historical development of knowledge derived from these investigations. Before 1783, historical accounts of the occurrence of landslides in earthquake are typically so incomplete and vague that conclusions based on these accounts are of limited usefulness. For example, the number of landslides triggered by a given event is almost always greatly underestimated. The first formal, scientific post-earthquake investigation that included systematic documentation of the landslides was undertaken in the Calabria region of Italy after the 1783 earthquake swarm. From then until the mid-twentieth century, the best information on earthquake-induced landslides came from a succession of post-earthquake investigations largely carried out by formal commissions that undertook extensive ground-based field studies. Beginning in the mid-twentieth century, when the use of aerial photography became widespread, comprehensive inventories of landslide occurrence have been made for several earthquakes in the United States, Peru, Guatemala, Italy, El Salvador, Japan, and Taiwan. Techniques have also been developed for performing \"retrospective\" analyses years or decades after an earthquake that attempt to reconstruct the distribution of landslides triggered by the event. The additional use of Geographic Information System (GIS) processing and digital mapping since about 1989 has greatly facilitated the level of analysis that can applied to mapped distributions of landslides. Beginning in 1984, synthesis of worldwide and national data on earthquake-induced landslides have defined their general characteristics and relations between their occurrence and various geologic and seismic parameters. However, the number of comprehensive post-earthquake studies of landslides is still relatively small, and one of the most pressing needs in this area of research is for the complete documentation of landslides triggered by many more earthquakes in a wider variety of environments.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Surveys in Geophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1023/A:1021274710840","issn":"01693298","usgsCitation":"Keefer, D.K., 2002, Investigating landslides caused by earthquakes - A historical review: Surveys in Geophysics, v. 23, no. 6, p. 473-510, https://doi.org/10.1023/A:1021274710840.","startPage":"473","endPage":"510","numberOfPages":"38","costCenters":[],"links":[{"id":207332,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1021274710840"},{"id":232195,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3e6ae4b0c8380cd63d7c","contributors":{"authors":[{"text":"Keefer, D. K.","contributorId":21176,"corporation":false,"usgs":true,"family":"Keefer","given":"D.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":399020,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70023827,"text":"70023827 - 2002 - Anthropogenic sources of arsenic and copper to sediments in a suburban lake, Northern Virginia","interactions":[],"lastModifiedDate":"2017-08-26T14:32:32","indexId":"70023827","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Anthropogenic sources of arsenic and copper to sediments in a suburban lake, Northern Virginia","docAbstract":"Mass balances of total arsenic and copper for a suburban lake in densely populated northern Virginia were calculated using data collected during 1998. Mass-balance terms were precipitation; stream inflow, including road runoff; stream outflow; and contributions from leaching of pressure-treated lumber. More mass of arsenic and copper was input to the lake than was output; the 1998 lake-retention rates were 70% for arsenic and 20% for copper. The arsenic mass balance compared well with a calculated annual mass accumulation in the top 1 cm of the lake sediments; however, the calculated contribution of copper to the lake was insufficient to account for the amount of copper in this zone. Leaching experiments were conducted on lumber treated with chromated copper arsenate (CCA) to quantify approximate amounts of arsenic and copper contributed by this source. Sources to lake sediments included leaching of CCA-treated lumber (arsenic, 50%; copper, 4%), streamwater (arsenic, 50%; copper, 90%), and atmospheric deposition (arsenic, 1%; copper, 3%). Results of this study suggest that CCA-treated lumber and road runoff could be significant nonpoint sources of arsenic and copper, respectively, in suburban catchments.","language":"English","publisher":"ACS Publications","doi":"10.1021/es025727x","issn":"0013936X","usgsCitation":"Rice, K.C., Conko, K.M., and Hornberger, G., 2002, Anthropogenic sources of arsenic and copper to sediments in a suburban lake, Northern Virginia: Environmental Science & Technology, v. 36, no. 23, p. 4962-4967, https://doi.org/10.1021/es025727x.","productDescription":"6 p.","startPage":"4962","endPage":"4967","costCenters":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"links":[{"id":232630,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Virginia","volume":"36","issue":"23","noUsgsAuthors":false,"publicationDate":"2002-10-23","publicationStatus":"PW","scienceBaseUri":"5059ec5ce4b0c8380cd49217","contributors":{"authors":[{"text":"Rice, Karen C. 0000-0002-9356-5443 kcrice@usgs.gov","orcid":"https://orcid.org/0000-0002-9356-5443","contributorId":1998,"corporation":false,"usgs":true,"family":"Rice","given":"Karen","email":"kcrice@usgs.gov","middleInitial":"C.","affiliations":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"preferred":false,"id":398980,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Conko, Kathryn M. 0000-0001-6361-4921 kmconko@usgs.gov","orcid":"https://orcid.org/0000-0001-6361-4921","contributorId":2930,"corporation":false,"usgs":true,"family":"Conko","given":"Kathryn","email":"kmconko@usgs.gov","middleInitial":"M.","affiliations":[],"preferred":true,"id":398978,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hornberger, George M.","contributorId":63894,"corporation":false,"usgs":true,"family":"Hornberger","given":"George M.","affiliations":[],"preferred":false,"id":398979,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70023813,"text":"70023813 - 2002 - Spatial and temporal snowpack variation in the crown of the continent ecosystem","interactions":[],"lastModifiedDate":"2012-03-12T17:20:13","indexId":"70023813","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Spatial and temporal snowpack variation in the crown of the continent ecosystem","docAbstract":"Snowpack related ecosystem changes such as glacier recession and alpine treeline advance have been documented in the Crown of the Continent Ecosystem (CCE) over the course of the previous 150 years. Using data from the Natural Resource Conservation Service's SNOTEL sites and snow course surveys, we examined the spatial and temporal variation in snowpack in the region. SNOTEL data suggest CCE snowpacks are larger and more persistent than in most regions of the Western U.S., and that water year precipitation, rather than mean temperature, is the primary control on April 1 snow water equivalent (SWE). Snow course data indicate a statistically significant downward trend in mean April 1 SWE for the period 1950-2001 but no statistically significant trend in mean May 1 SWE for the longer period 1922-2001. Further analysis reveals that variations in both April 1 and May 1 mean SWE are closely tied to the Pacific Decadal Oscillation, an ENSO-like interdecadal pattern of Pacific Ocean climate variability. Despite no significant trend in mean May 1 SWE between 1922-2001, glaciers in Glacier National Park receded steadily during this period, implying changing climatic conditions crossed a threshold for glacier mass balance maintenace sometime between the Little Ice Age glacial maxima and 1922.","largerWorkTitle":"Proceedings of The Western Snow Conference","conferenceTitle":"70th Annual Meeting Western Snow Conference","conferenceDate":"20 May 2002 through 23 May 2002","conferenceLocation":"Granby, CO","language":"English","issn":"01610589","usgsCitation":"Selkowitz, D., Fagre, D., and Reardon, B., 2002, Spatial and temporal snowpack variation in the crown of the continent ecosystem, <i>in</i> Proceedings of The Western Snow Conference, Granby, CO, 20 May 2002 through 23 May 2002, p. 98-109.","startPage":"98","endPage":"109","numberOfPages":"12","costCenters":[],"links":[{"id":232429,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9445e4b08c986b31a98f","contributors":{"authors":[{"text":"Selkowitz, D.J.","contributorId":82886,"corporation":false,"usgs":true,"family":"Selkowitz","given":"D.J.","affiliations":[],"preferred":false,"id":398941,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fagre, D.B.","contributorId":52135,"corporation":false,"usgs":true,"family":"Fagre","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":398940,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reardon, B.A.","contributorId":51497,"corporation":false,"usgs":true,"family":"Reardon","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":398939,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70023791,"text":"70023791 - 2002 - Asymptotic approximations to posterior distributions via conditional moment equations","interactions":[],"lastModifiedDate":"2012-03-12T17:20:12","indexId":"70023791","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1040,"text":"Biometrika","active":true,"publicationSubtype":{"id":10}},"title":"Asymptotic approximations to posterior distributions via conditional moment equations","docAbstract":"We consider asymptotic approximations to joint posterior distributions in situations where the full conditional distributions referred to in Gibbs sampling are asymptotically normal. Our development focuses on problems where data augmentation facilitates simpler calculations, but results hold more generally. Asymptotic mean vectors are obtained as simultaneous solutions to fixed point equations that arise naturally in the development. Asymptotic covariance matrices flow naturally from the work of Arnold & Press (1989) and involve the conditional asymptotic covariance matrices and first derivative matrices for conditional mean functions. When the fixed point equations admit an analytical solution, explicit formulae are subsequently obtained for the covariance structure of the joint limiting distribution, which may shed light on the use of the given statistical model. Two illustrations are given. ?? 2002 Biometrika Trust.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biometrika","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1093/biomet/89.4.755","issn":"00063444","usgsCitation":"Yee, J., Johnson, W., and Samaniego, F., 2002, Asymptotic approximations to posterior distributions via conditional moment equations: Biometrika, v. 89, no. 4, p. 755-767, https://doi.org/10.1093/biomet/89.4.755.","startPage":"755","endPage":"767","numberOfPages":"13","costCenters":[],"links":[{"id":207612,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1093/biomet/89.4.755"},{"id":232711,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"89","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee99e4b0c8380cd49e5c","contributors":{"authors":[{"text":"Yee, J.L.","contributorId":25496,"corporation":false,"usgs":true,"family":"Yee","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":398856,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnson, W.O.","contributorId":32052,"corporation":false,"usgs":true,"family":"Johnson","given":"W.O.","email":"","affiliations":[],"preferred":false,"id":398857,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Samaniego, F.J.","contributorId":78212,"corporation":false,"usgs":true,"family":"Samaniego","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":398858,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025058,"text":"70025058 - 2002 - Mapping Chinese tallow with color-infrared photography","interactions":[],"lastModifiedDate":"2012-03-12T17:20:56","indexId":"70025058","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Mapping Chinese tallow with color-infrared photography","docAbstract":"Airborne color-infrared photography (CIR) (1:12,000 scale) was used to map localized occurrences of the widespread and aggressive Chinese tallow (Sapium sebiferum), an invasive species. Photography was collected during senescence when Chinese tallow's bright red leaves presented a high spectral contrast within the native bottomland hardwood and upland forests and marsh land-cover types. Mapped occurrences were conservative because not all senescing tallow leaves are bright red simultaneously. To simulate low spectral but high spatial resolution satellite/airborne image and digital video data, the CIR photography was transformed into raster images at spatial resolutions approximating 0.5 in and 1.0 m. The image data were then spectrally classified for the occurrence of bright red leaves associated with senescing Chinese tallow. Classification accuracies were greater than 95 percent at both spatial resolutions. There was no significant difference in either forest in the detection of tallow or inclusion of non-tallow trees associated with the two spatial resolutions. In marshes, slightly more tallow occurrences were mapped with the lower spatial resolution, but there were also more misclassifications of native land covers as tallow. Combining all land covers, there was no difference at detecting tallow occurrences (equal omission errors) between the two resolutions, but the higher spatial resolution was associated with less inclusion of non-tallow land covers as tallow (lower commission error). Overall, these results confirm that high spatial (???1 m) but low spectral resolution remote sensing data can be used for mapping Chinese tallow trees in dominant environments found in coastal and adjacent upland landscapes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Engineering and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00991112","usgsCitation":"Ramsey, E., Nelson, G., Sapkota, S., Seeger, E., and Martella, K., 2002, Mapping Chinese tallow with color-infrared photography: Photogrammetric Engineering and Remote Sensing, v. 68, no. 3, p. 251-255.","startPage":"251","endPage":"255","numberOfPages":"5","costCenters":[],"links":[{"id":236132,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"68","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5043e4b0c8380cd6b56e","contributors":{"authors":[{"text":"Ramsey, Elijah W. III 0000-0002-4518-5796","orcid":"https://orcid.org/0000-0002-4518-5796","contributorId":72769,"corporation":false,"usgs":true,"family":"Ramsey","given":"Elijah W.","suffix":"III","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":403636,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nelson, G.A.","contributorId":17687,"corporation":false,"usgs":true,"family":"Nelson","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":403634,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sapkota, S.K.","contributorId":24434,"corporation":false,"usgs":true,"family":"Sapkota","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":403635,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Seeger, E.B.","contributorId":97301,"corporation":false,"usgs":true,"family":"Seeger","given":"E.B.","email":"","affiliations":[],"preferred":false,"id":403637,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Martella, K.D.","contributorId":107077,"corporation":false,"usgs":true,"family":"Martella","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":403638,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70025061,"text":"70025061 - 2002 - Basalt-flow imaging using a high-resolution directional borehole radar","interactions":[],"lastModifiedDate":"2012-03-12T17:20:55","indexId":"70025061","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Basalt-flow imaging using a high-resolution directional borehole radar","docAbstract":"A new high-resolution directional borehole radar-logging tool (DBOR tool) was used to log three wells at the Idaho National Engineering and Environmental Laboratory (INEEL). The radar system uses identical directional cavity-backed monopole transmitting and receiving antennas that can be mechanically rotated while the tool is stationary or moving slowly in a borehole. Faster reconnaissance logging with no antenna rotation was also done to find zones of interest. The microprocessor-controlled motor/encoder in the tool can rotate the antennas azimuthally, to a commanded angle, accurate to a within few degrees. The three logged wells in the unsaturated zone at the INEEL had been cored with good core recovery through most zones. After coring, PVC casing was installed in the wells. The unsaturated zone consists of layered basalt flows that are interbedded with thin layers of coarse-to-fine grained sediments. Several zones were found that show distinctive signatures consistent with fractures in the basalt. These zones may correspond to suspected preferential flow paths. The DBOR data were compared to core, and other borehole log information to help provide better understanding of hydraulic flow and transport in preferential flow paths in the unsaturated zone basalts at the INEEL.","largerWorkTitle":"Proceedings of SPIE - The International Society for Optical Engineering","conferenceTitle":"9th International Conference on Ground Penetrating Radar","conferenceDate":"29 April 2002 through 2 May 2002","conferenceLocation":"Santa Barbara, CA","language":"English","doi":"10.1117/12.462208","issn":"0277786X","usgsCitation":"Moulton, C., Wright, D., Hutton, S., Smith, D., and Abraham, J., 2002, Basalt-flow imaging using a high-resolution directional borehole radar, <i>in</i> Proceedings of SPIE - The International Society for Optical Engineering, v. 4758, Santa Barbara, CA, 29 April 2002 through 2 May 2002, p. 13-18, https://doi.org/10.1117/12.462208.","startPage":"13","endPage":"18","numberOfPages":"6","costCenters":[],"links":[{"id":209567,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1117/12.462208"},{"id":236170,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4758","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059efc2e4b0c8380cd4a433","contributors":{"authors":[{"text":"Moulton, C.W.","contributorId":81681,"corporation":false,"usgs":true,"family":"Moulton","given":"C.W.","email":"","affiliations":[],"preferred":false,"id":403658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wright, D.L.","contributorId":88758,"corporation":false,"usgs":true,"family":"Wright","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":403659,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hutton, S.R.","contributorId":50337,"corporation":false,"usgs":true,"family":"Hutton","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":403656,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Smith, D.V.G.","contributorId":57249,"corporation":false,"usgs":true,"family":"Smith","given":"D.V.G.","email":"","affiliations":[],"preferred":false,"id":403657,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Abraham, J.D.","contributorId":20686,"corporation":false,"usgs":true,"family":"Abraham","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":403655,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70025073,"text":"70025073 - 2002 - Using groundwater levels to estimate recharge","interactions":[],"lastModifiedDate":"2020-09-25T17:53:14.003551","indexId":"70025073","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Using groundwater levels to estimate recharge","docAbstract":"Accurate estimation of groundwater recharge is extremely important for proper management of groundwater systems. Many different approaches exist for estimating recharge. This paper presents a review of methods that are based on groundwater-level data. The water-table fluctuation method may be the most widely used technique for estimating recharge; it requires knowledge of specific yield and changes in water levels over time. Advantages of this approach include its simplicity and an insensitivity to the mechanism by which water moves through the unsaturated zone. Uncertainty in estimates generated by this method relate to the limited accuracy with which specific yield can be determined and to the extent to which assumptions inherent in the method are valid. Other methods that use water levels (mostly based on the Darcy equation) are also described. The theory underlying the methods is explained. Examples from the literature are used to illustrate applications of the different methods.","language":"English","publisher":"Springer","doi":"10.1007/s10040-001-0178-0","issn":"14312174","usgsCitation":"Healy, R.W., and Cook, P., 2002, Using groundwater levels to estimate recharge: Hydrogeology Journal, v. 10, no. 1, p. 91-109, https://doi.org/10.1007/s10040-001-0178-0.","productDescription":"19 p.","startPage":"91","endPage":"109","numberOfPages":"19","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":235761,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"1","noUsgsAuthors":false,"publicationDate":"2002-01-12","publicationStatus":"PW","scienceBaseUri":"505bc059e4b08c986b32a08d","contributors":{"authors":[{"text":"Healy, R. W.","contributorId":89872,"corporation":false,"usgs":true,"family":"Healy","given":"R.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":403704,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cook, P.G.","contributorId":103807,"corporation":false,"usgs":true,"family":"Cook","given":"P.G.","email":"","affiliations":[],"preferred":false,"id":403705,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025074,"text":"70025074 - 2002 - Satellite mapping of surface biophysical parameters at the biome scale over the North American grasslands: A case study","interactions":[],"lastModifiedDate":"2017-04-10T10:12:05","indexId":"70025074","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3254,"text":"Remote Sensing of Environment","printIssn":"0034-4257","active":true,"publicationSubtype":{"id":10}},"title":"Satellite mapping of surface biophysical parameters at the biome scale over the North American grasslands: A case study","docAbstract":"<p><span>Quantification of biophysical parameters is needed by terrestrial process modeling and other applications. A study testing the role of multispectral data for monitoring biophysical parameters was conducted over a network of grassland field sites in the Great Plains of North America. Grassland biophysical parameters [leaf area index (LAI), fraction of absorbed photosynthetically active radiation (fPAR), and biomass] and their relationships with ground radiometer normalized difference vegetation index (NDVI) were established in this study (</span><i>r</i><sup>2</sup><span>=.66–.85) from data collected across the central and northern Great Plains in 1995. These spectral/biophysical relationships were compared to 1996 field data from the Tallgrass Prairie Preserve in northeastern Oklahoma and showed no consistent biases, with most regression estimates falling within the respective 95% confidence intervals. Biophysical parameters were estimated for 21 “ground pixels” (grids) at the Tallgrass Prairie Preserve in 1996, representing three grazing/burning treatments. Each grid was 30×30 m in size and was systematically sampled with ground radiometer readings. The radiometric measurements were then converted to biophysical parameters and spatially interpolated using geostatistical kriging. Grid-based biophysical parameters were monitored through the growing season and regressed against Landsat Thematic Mapper (TM) NDVI (</span><i>r</i><sup>2</sup><span>=.92–.94). These regression equations were used to estimate biophysical parameters for grassland TM pixels over the Tallgrass Prairie Preserve in 1996. This method maintained consistent regression development and prediction scales and attempted to minimize scaling problems associated with mixed land cover pixels. A method for scaling Landsat biophysical parameters to coarser resolution satellite data sets (1 km</span><sup>2</sup><span>) was also investigated.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0034-4257(01)00278-4","issn":"00344257","usgsCitation":"Wylie, B., Meyer, D.J., Tieszen, L., and Mannel, S., 2002, Satellite mapping of surface biophysical parameters at the biome scale over the North American grasslands: A case study: Remote Sensing of Environment, v. 79, no. 2-3, p. 266-278, https://doi.org/10.1016/S0034-4257(01)00278-4.","productDescription":"13 p.","startPage":"266","endPage":"278","numberOfPages":"13","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":235762,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":209384,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0034-4257(01)00278-4"}],"volume":"79","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b86dfe4b08c986b316194","contributors":{"authors":[{"text":"Wylie, B.K. 0000-0002-7374-1083","orcid":"https://orcid.org/0000-0002-7374-1083","contributorId":24877,"corporation":false,"usgs":true,"family":"Wylie","given":"B.K.","affiliations":[],"preferred":false,"id":403707,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meyer, D. J.","contributorId":46721,"corporation":false,"usgs":true,"family":"Meyer","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":403708,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tieszen, L.L.","contributorId":24046,"corporation":false,"usgs":true,"family":"Tieszen","given":"L.L.","email":"","affiliations":[],"preferred":false,"id":403706,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mannel, S.","contributorId":65647,"corporation":false,"usgs":true,"family":"Mannel","given":"S.","email":"","affiliations":[],"preferred":false,"id":403709,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025078,"text":"70025078 - 2002 - Microbial ecology of a crude oil contaminated aquifer","interactions":[],"lastModifiedDate":"2012-03-12T17:20:27","indexId":"70025078","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1934,"text":"IAHS-AISH Publication","active":true,"publicationSubtype":{"id":10}},"title":"Microbial ecology of a crude oil contaminated aquifer","docAbstract":"Detailed microbial analyses of a glacial outwash aquifer contaminated by crude oil provide insights into the pattern of microbial succession from iron reducing to methanogenic in the anaerobic portion of the contaminant plume. We analysed sediments from this area for populations of aerobes, iron reducers, fermenters and methanogens, using the most probable number method. On the basis of the microbial data the anaerobic area can be divided into distinct physiological zones dominated by either iron-reducers or a consortium of fermenters and methanogens. Chemistry and permeability data show that methanogenic conditions develop first in areas of high hydrocarbon flux. Thus, we find methanogens both in high permeability horizons and also where separate-phase crude oil is present in either the saturated or unsaturated zone. Microbial numbers peak at the top of the separate-phase oil suggesting that growth is most rapid in locations with access to both hydrocarbons and nutrients infiltrating from the surface.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"IAHS-AISH Publication","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"01447815","usgsCitation":"Bekins, B., Cozzarelli, I., Warren, E., and Godsy, E., 2002, Microbial ecology of a crude oil contaminated aquifer: IAHS-AISH Publication, no. 275, p. 57-64.","startPage":"57","endPage":"64","numberOfPages":"8","costCenters":[],"links":[{"id":235801,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"275","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a564fe4b0c8380cd6d4cf","contributors":{"authors":[{"text":"Bekins, B.A.","contributorId":98309,"corporation":false,"usgs":true,"family":"Bekins","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":403728,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cozzarelli, I.M. 0000-0002-5123-1007","orcid":"https://orcid.org/0000-0002-5123-1007","contributorId":22343,"corporation":false,"usgs":true,"family":"Cozzarelli","given":"I.M.","affiliations":[],"preferred":false,"id":403726,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Warren, E.","contributorId":15360,"corporation":false,"usgs":true,"family":"Warren","given":"E.","email":"","affiliations":[],"preferred":false,"id":403725,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Godsy, E.M.","contributorId":56685,"corporation":false,"usgs":true,"family":"Godsy","given":"E.M.","email":"","affiliations":[],"preferred":false,"id":403727,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025087,"text":"70025087 - 2002 - Recharge and groundwater models: An overview","interactions":[],"lastModifiedDate":"2012-03-12T17:20:26","indexId":"70025087","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Recharge and groundwater models: An overview","docAbstract":"Recharge is a fundamental component of groundwater systems, and in groundwater-modeling exercises recharge is either measured and specified or estimated during model calibration. The most appropriate way to represent recharge in a groundwater model depends upon both physical factors and study objectives. Where the water table is close to the land surface, as in humid climates or regions with low topographic relief, a constant-head boundary condition is used. Conversely, where the water table is relatively deep, as in drier climates or regions with high relief, a specified-flux boundary condition is used. In most modeling applications, mixed-type conditions are more effective, or a combination of the different types can be used. The relative distribution of recharge can be estimated from water-level data only, but flux observations must be incorporated in order to estimate rates of recharge. Flux measurements are based on either Darcian velocities (e.g., stream base-flow) or seepage velocities (e.g., groundwater age). In order to estimate the effective porosity independently, both types of flux measurements must be available. Recharge is often estimated more efficiently when automated inverse techniques are used. Other important applications are the delineation of areas contributing recharge to wells and the estimation of paleorecharge rates using carbon-14.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrogeology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10040-001-0173-5","issn":"14312174","usgsCitation":"Sanford, W., 2002, Recharge and groundwater models: An overview: Hydrogeology Journal, v. 10, no. 1, p. 110-120, https://doi.org/10.1007/s10040-001-0173-5.","startPage":"110","endPage":"120","numberOfPages":"11","costCenters":[],"links":[{"id":209469,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-001-0173-5"},{"id":235947,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"1","noUsgsAuthors":false,"publicationDate":"2002-01-12","publicationStatus":"PW","scienceBaseUri":"505a9661e4b0c8380cd81f6e","contributors":{"authors":[{"text":"Sanford, W.","contributorId":76490,"corporation":false,"usgs":true,"family":"Sanford","given":"W.","email":"","affiliations":[],"preferred":false,"id":403764,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025091,"text":"70025091 - 2002 - Satellite imagery for volcanic hazards mitigation","interactions":[],"lastModifiedDate":"2012-03-12T17:20:26","indexId":"70025091","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Satellite imagery for volcanic hazards mitigation","docAbstract":"The Committee on Earth Observation Satellites (CEOS) seeks to foster cooperation to increase the usefulness and accessibility of satellite imagery. In 1997, CEOS initiated the Disaster Management Support Project to assess the present and potential use of satellite-derived information for volcanic hazards mitigation. The final report of the CEOS Volcanic Hazards Working Group reviews current use of satellite data for mitigation of volcanic hazards. The report specifies the minimum spectral channels needed for effective remote sensing of volcanic hazards, together with recommendations for threshold and optimum spatial and temporal resolutions.","largerWorkTitle":"International Geoscience and Remote Sensing Symposium (IGARSS)","conferenceTitle":"2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002)","conferenceDate":"24 June 2002 through 28 June 2002","conferenceLocation":"Toronto, Ont.","language":"English","usgsCitation":"Helz, R., Ellrod, G., and Wadge, G., 2002, Satellite imagery for volcanic hazards mitigation, <i>in</i> International Geoscience and Remote Sensing Symposium (IGARSS), v. 2, Toronto, Ont., 24 June 2002 through 28 June 2002, p. 757-758.","startPage":"757","endPage":"758","numberOfPages":"2","costCenters":[],"links":[{"id":235984,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b86dbe4b08c986b316171","contributors":{"authors":[{"text":"Helz, Rosalind Tuthill 0000-0003-1550-0684","orcid":"https://orcid.org/0000-0003-1550-0684","contributorId":16806,"corporation":false,"usgs":true,"family":"Helz","given":"Rosalind Tuthill","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":403792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ellrod, G.A.","contributorId":98518,"corporation":false,"usgs":true,"family":"Ellrod","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":403794,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wadge, G.","contributorId":35106,"corporation":false,"usgs":true,"family":"Wadge","given":"G.","affiliations":[],"preferred":false,"id":403793,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025099,"text":"70025099 - 2002 - SHE analysis for biozonation of benthic foraminiferal assemblages from western arctic ocean","interactions":[],"lastModifiedDate":"2022-08-15T16:36:33.114112","indexId":"70025099","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3000,"text":"Palaios","active":true,"publicationSubtype":{"id":10}},"title":"SHE analysis for biozonation of benthic foraminiferal assemblages from western arctic ocean","docAbstract":"<p>Benthic foraminiferal species abundance in samples from three Mendeleyev Ridge box cores were analyzed by cluster analysis and the newer method of SHE analysis. Previously, the latter technique only has been used on foraminiferal data from depth transects of modern surface sediment samples. Unlike most methods, which initially compare all possible pairs of samples, the SHE procedure results in a linear pattern if a sequence of samples are from the same statistical distribution. A change in slope indicates a statistical change in community structure and/or a change in species composition.</p><p>The research reported herein is the first application of SHE for the purpose of identifying biozones in sediment core samples for the purpose of stratigraphic correlation. Both cluster analysis and the SHE method provided zonation within cores. However, the cluster method often produced clusters that were difficult to identify and also contained a mixture of samples without stratigraphic continuity. In contrast, SHE resulted in easily identifiable biozones and ensured temporal continuity within them. In general, the cluster analysis produced more zones than the SHE analysis. About 87% of the cluster zones and 64% of the SHE zones were correlated across more than one core. The average age range for correlated biozone boundaries among the three cores, based on radiocarbon dates, was 821 years using cluster analysis and 296 years using SHE. The sequential nature of the analysis, ease in choosing boundaries, and correlation of these boundaries across cores makes SHE the preferred technique.</p>","language":"English","publisher":"SEPM Society for Sedimentary Geology","doi":"10.1669/0883-1351(2002)017%3C0297:SAFBOB%3E2.0.CO;2","usgsCitation":"Osterman, L.E., Buzas, M.A., and Hayek, L.C., 2002, SHE analysis for biozonation of benthic foraminiferal assemblages from western arctic ocean: Palaios, v. 17, no. 3, p. 297-303, https://doi.org/10.1669/0883-1351(2002)017%3C0297:SAFBOB%3E2.0.CO;2.","productDescription":"7 p.","startPage":"297","endPage":"303","numberOfPages":"7","costCenters":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":236134,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaf3ee4b0c8380cd87487","contributors":{"authors":[{"text":"Osterman, Lisa E. osterman@usgs.gov","contributorId":3058,"corporation":false,"usgs":true,"family":"Osterman","given":"Lisa","email":"osterman@usgs.gov","middleInitial":"E.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":403815,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Buzas, Martin A","contributorId":261663,"corporation":false,"usgs":false,"family":"Buzas","given":"Martin","email":"","middleInitial":"A","affiliations":[{"id":36606,"text":"Smithsonian Institution","active":true,"usgs":false}],"preferred":false,"id":403816,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hayek, Lee-Ann C.","contributorId":16730,"corporation":false,"usgs":true,"family":"Hayek","given":"Lee-Ann","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":403817,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025102,"text":"70025102 - 2002 - Groundwater recharge and agricultural contamination","interactions":[],"lastModifiedDate":"2017-06-02T13:28:53","indexId":"70025102","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Groundwater recharge and agricultural contamination","docAbstract":"<p><span>Agriculture has had direct and indirect effects on the rates and compositions of groundwater recharge and aquifer biogeochemistry. Direct effects include dissolution and transport of excess quantities of fertilizers and associated materials and hydrologic alterations related to irrigation and drainage. Some indirect effects include changes in water–rock reactions in soils and aquifers caused by increased concentrations of dissolved oxidants, protons, and major ions. Agricultural activities have directly or indirectly affected the concentrations of a large number of inorganic chemicals in groundwater, for example NO</span><sub>3</sub><sup>–</sup><span>, N</span><sub>2</sub><span>, Cl, SO</span><sub>4</sub><sup>2–</sup><span>, H</span><sup>+</sup><span>, P, C, K, Mg, Ca, Sr, Ba, Ra, and As, as well as a wide variety of pesticides and other organic compounds. For reactive contaminants like NO</span><sub>3</sub><sup>–</sup><span>, a combination of chemical, isotopic, and environmental-tracer analytical approaches might be required to resolve changing inputs from subsequent alterations as causes of concentration gradients in groundwater. Groundwater records derived from multi-component hydrostratigraphic data can be used to quantify recharge rates and residence times of water and dissolved contaminants, document past variations in recharging contaminant loads, and identify natural contaminant-remediation processes. These data indicate that many of the world's surficial aquifers contain transient records of changing agricultural contamination from the last half of the 20th century. The transient agricultural groundwater signal has important implications for long-term trends and spatial heterogeneity in discharge.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s10040-001-0183-3","issn":"14312174","usgsCitation":"Böhlke, J., 2002, Groundwater recharge and agricultural contamination: Hydrogeology Journal, v. 10, no. 1, p. 153-179, https://doi.org/10.1007/s10040-001-0183-3.","productDescription":"27 p.","startPage":"153","endPage":"179","numberOfPages":"27","costCenters":[],"links":[{"id":236172,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":209568,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-001-0183-3"}],"volume":"10","issue":"1","noUsgsAuthors":false,"publicationDate":"2002-01-22","publicationStatus":"PW","scienceBaseUri":"505a2dbde4b0c8380cd5bfe7","contributors":{"authors":[{"text":"Böhlke, J.K. 0000-0001-5693-6455","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":96696,"corporation":false,"usgs":true,"family":"Böhlke","given":"J.K.","affiliations":[],"preferred":false,"id":403828,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025103,"text":"70025103 - 2002 - Site effects in Avcilar, West of Istanbul, Turkey, from strong- and weak-motion data","interactions":[],"lastModifiedDate":"2012-03-12T17:20:56","indexId":"70025103","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Site effects in Avcilar, West of Istanbul, Turkey, from strong- and weak-motion data","docAbstract":"Approximately 1000 people were killed in the collapse of buildings in Istanbul, Turkey, during the 17 August 1999 I??zmit earthquake, whose epicenter was roughly 90 km east of the city. Most of the fatalities and damage occurred in the suburb of Avcilar that is 20 km further west of the epicenter than the city proper. To investigate this pattern of damage, the U.S. Geological Survey, in cooperation with the Kandilli Observatory and Earthquake Research Institute (KOERI), deployed portable digital seismographs at seven free-field sites in western Istanbul, to record aftershocks during the period from 24 August to 2 September. The primary objective of this deployment was to study the site effects by comparing the aftershock ground motions recorded at sites inside and outside the damaged area, and to correlate site effects with the distribution of the damaged buildings. In addition to using weak-motion data, mainshock and aftershock acceleration records from the KOERI permanent strong-motion array were also used in estimating the site effects. Site effects were estimated using S waves from both types of records. For the weak-motion data set, 22 events were selected according to the criteria of signal-to-noise ratio (S/N ratio) and the number of stations recording the same event. The magnitudes of these events ranged from 3.0 to 5.2. The acceleration data set consisted of 12 events with magnitudes ranging from 4.3 to 5.8 and included two mainshock events. Results show that the amplifying frequency band is, in general, less than 4 Hz, and the physical properties of the geologic materials are capable of amplifying the motions by a factor of 5-10. In this frequency band, there is a good agreement among the spectral ratios obtained from the two mainshocks and their aftershocks. The damage pattern for the 17 August I??zmit earthquake is determined by several factors. However, our study suggests that the site effects in Avcilar played an important role in contributing to the damage.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120000827","issn":"00371106","usgsCitation":"Ozel, O., Cranswick, E., Meremonte, M., Erdik, M., and Safak, E., 2002, Site effects in Avcilar, West of Istanbul, Turkey, from strong- and weak-motion data: Bulletin of the Seismological Society of America, v. 92, no. 1, p. 499-508, https://doi.org/10.1785/0120000827.","startPage":"499","endPage":"508","numberOfPages":"10","costCenters":[],"links":[{"id":209569,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120000827"},{"id":236173,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"92","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b90f2e4b08c986b3196f8","contributors":{"authors":[{"text":"Ozel, O.","contributorId":9796,"corporation":false,"usgs":true,"family":"Ozel","given":"O.","email":"","affiliations":[],"preferred":false,"id":403829,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cranswick, E.","contributorId":85948,"corporation":false,"usgs":true,"family":"Cranswick","given":"E.","affiliations":[],"preferred":false,"id":403832,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Meremonte, M.","contributorId":22915,"corporation":false,"usgs":true,"family":"Meremonte","given":"M.","affiliations":[],"preferred":false,"id":403830,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Erdik, M.","contributorId":55170,"corporation":false,"usgs":true,"family":"Erdik","given":"M.","affiliations":[],"preferred":false,"id":403831,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Safak, E.","contributorId":104070,"corporation":false,"usgs":true,"family":"Safak","given":"E.","email":"","affiliations":[],"preferred":false,"id":403833,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70025104,"text":"70025104 - 2002 - Effects of ENSO on weather-type frequencies and properties at New Orleans, Louisiana, USA","interactions":[],"lastModifiedDate":"2021-12-22T16:00:13.421888","indexId":"70025104","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1249,"text":"Climate Research","active":true,"publicationSubtype":{"id":10}},"title":"Effects of ENSO on weather-type frequencies and properties at New Orleans, Louisiana, USA","docAbstract":"<p><span>Examination of historical climate records indicates a significant relation between the El Nino/Southern Oscillation (ENSO) and seasonal temperature and precipitation in Louisiana. In this study, a 40 yr record of twice daily (06:00 and 15:00 h local time) weather types are used to study the effects of ENSO variability on the local climate at New Orleans, Louisiana. Tropical Pacific sea-surface temperatures (SSTs) for the NINO3.4 region are used to define ENSO events (i.e. El Nino and La Nina events), and daily precipitation and temperature data for New Orleans are used to define weather-type precipitation and temperature properties. Data for winters (December through February) 1962-2000 are analyzed. The 39 winters are divided into 3 categories; winters with NINO3.4 SST anomalies &lt; -1degreesC (La Nina events), winters with NINO3.4 anomalies &gt; 1degreesC (El Nino events), and neutral conditions (all other years). For each category, weather-type frequencies and properties (i.e. precipitation and temperature) are determined and analyzed. Results indicate that El Nino events primarily affect precipitation characteristics of weather types at New Orleans, whereas the effects of La Nina events are most apparent in weather-type frequencies. During El Nino events, precipitation for some of the weather types is greater than during neutral and La Nina conditions and is related to increased water vapor transport from the Tropics to the Gulf of Mexico. The changes in weather-type frequencies during La Nina events are indicative of a northward shift in storm tracks and/or a decrease in storm frequency in southern Louisiana.</span></p>","language":"English","publisher":"Inter-Research Science Publisher","doi":"10.3354/cr020095","usgsCitation":"McCabe, G., and Muller, R., 2002, Effects of ENSO on weather-type frequencies and properties at New Orleans, Louisiana, USA: Climate Research, v. 20, no. 2, p. 95-105, https://doi.org/10.3354/cr020095.","productDescription":"11 p.","startPage":"95","endPage":"105","costCenters":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"links":[{"id":478787,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/cr020095","text":"Publisher Index Page"},{"id":236209,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Louisiana","city":"New Orleans","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -90.208740234375,\n              29.897805610155874\n            ],\n            [\n              -89.95056152343749,\n              29.897805610155874\n            ],\n            [\n              -89.95056152343749,\n              30.016787209111047\n            ],\n            [\n              -90.208740234375,\n              30.016787209111047\n            ],\n            [\n              -90.208740234375,\n              29.897805610155874\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"20","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a064ee4b0c8380cd511c8","contributors":{"authors":[{"text":"McCabe, G.J. 0000-0002-9258-2997","orcid":"https://orcid.org/0000-0002-9258-2997","contributorId":12961,"corporation":false,"usgs":true,"family":"McCabe","given":"G.J.","affiliations":[],"preferred":false,"id":403834,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Muller, R.A.","contributorId":73592,"corporation":false,"usgs":true,"family":"Muller","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":403835,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025105,"text":"70025105 - 2002 - Evaluating the influence of source basins on downstream water quality in the Mississippi River","interactions":[],"lastModifiedDate":"2018-11-26T11:11:02","indexId":"70025105","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Evaluating the influence of source basins on downstream water quality in the Mississippi River","docAbstract":"<p><span>Chemical variability in the Mississippi River during water years 1989 to 1998 was evaluated using stream discharge and water‐quality data in conjunction with the DAFLOW/BLTM hydraulic model. Model simulations were used to identify subbasin contributions of water and chemical constituents to the Mississippi River upstream from its confluence with the Ohio and the Mississippi River and at the Atchafalaya Diversion in Louisiana. Concentrations of dissolved solids, sodium, and sulfate at the Thebes site showed a general decreasing trend, and concentrations of silica and nitrate showed a general increasing trend as the percentage of discharge from the Mississippi River upstream from Grafton increased. Concentrations of most chemical constituents in the Mississippi River at the Atchafalaya Diversion exhibited a decreasing trend as the percentage of water from the Ohio River increased. Regression models were used to evaluate the importance of the source of water to the water chemistry in the Mississippi River at Thebes and the Atchafalaya Diversion. The addition of terms in regression equations to account for the percent of water from sub‐basins improved coefficients of determination for predicting chemical concentrations by as much as nine percent at the Thebes site and by as much as 48 percent at the Atchafalaya Diversion site. The addition of source‐water terms to regression equations increased the estimated annual loads of nitrate and silica delivered from the Mississippi River Basin to the Gulf of Mexico by as much as 14 and 13 percent, respectively.</span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.2002.tb00998.x","issn":"1093474X","usgsCitation":"Clark, G.M., Broshears, R.E., Hooper, R.P., and Goolsby, D.A., 2002, Evaluating the influence of source basins on downstream water quality in the Mississippi River: Journal of the American Water Resources Association, v. 38, no. 3, p. 803-818, https://doi.org/10.1111/j.1752-1688.2002.tb00998.x.","productDescription":"16 p.","startPage":"803","endPage":"818","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":236210,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"505a0bfbe4b0c8380cd5299c","contributors":{"authors":[{"text":"Clark, Gregory M. gmclark@usgs.gov","contributorId":1377,"corporation":false,"usgs":true,"family":"Clark","given":"Gregory","email":"gmclark@usgs.gov","middleInitial":"M.","affiliations":[{"id":343,"text":"Idaho Water Science Center","active":true,"usgs":true}],"preferred":true,"id":403839,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Broshears, Robert E.","contributorId":40675,"corporation":false,"usgs":true,"family":"Broshears","given":"Robert","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":403838,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hooper, Richard P.","contributorId":19144,"corporation":false,"usgs":true,"family":"Hooper","given":"Richard","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":403836,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Goolsby, Donald A.","contributorId":46083,"corporation":false,"usgs":true,"family":"Goolsby","given":"Donald","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":403837,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025108,"text":"70025108 - 2002 - Subsurface fluid pressures from drill-stem tests, Uinta Basin, Utah","interactions":[],"lastModifiedDate":"2012-03-12T17:20:56","indexId":"70025108","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2789,"text":"Mountain Geologist","active":true,"publicationSubtype":{"id":10}},"title":"Subsurface fluid pressures from drill-stem tests, Uinta Basin, Utah","docAbstract":"High fluid pressures are known to be associated with oil and gas fields in the Uinta Basin, Utah. Shut-in pressure measurements from drill-stem tests show how pressure varies with depth and by area within the basin. The data base used in this report incorporates over 2,000 pressure measurements from drill-stem tests in wells completed prior to 1985. However, the number of useful pressure measurements is considerably less, because many drill-stem tests fail to stabilize at the actual formation pressure if the permeability is low. By extracting the maximum pressure measurements recorded in a collection of wells within an area, the trend of formation pressure within that area can be approximated. Areal compilations of pressures from drill-stem tests show that overpressured rock formations occur throughout much of the northern and eastern areas of the Uinta Basin. In particular, significant overpressuring (0.5 < pressure gradient < 0.8 psi/ft) is found throughout much of the Altamont-Bluebell field at depths ranging from 10,000 to 13,000 ft, equivalent to 5,000 to 8,000 ft below sea level. Limited data indicate that the pressure gradient declines at depths greater than 13,000 ft. An underpressured zone appears to exist in the Altamont-Bluebell field at depths shallower than 5,000 ft. Throughout the eastern Uinta Basin, moderately overpressured zones (0.46 < pressure gradient < 0.5 psi/ft) are common, with local evidence of significantly overpressured zones, but pressure gradients greater than 0.6 psi/ft are rare.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mountain Geologist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"0027254X","usgsCitation":"Nelson, P.H., 2002, Subsurface fluid pressures from drill-stem tests, Uinta Basin, Utah: Mountain Geologist, v. 39, no. 1, p. 17-26.","startPage":"17","endPage":"26","numberOfPages":"10","costCenters":[],"links":[{"id":236247,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9d66e4b08c986b31d81b","contributors":{"authors":[{"text":"Nelson, P. H.","contributorId":42238,"corporation":false,"usgs":true,"family":"Nelson","given":"P.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":403847,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025113,"text":"70025113 - 2002 - Spatial and statistical differences between 1:250,000- and 1:24,000-scale digital soil databases","interactions":[],"lastModifiedDate":"2012-03-12T17:20:28","indexId":"70025113","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2456,"text":"Journal of Soil and Water Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Spatial and statistical differences between 1:250,000- and 1:24,000-scale digital soil databases","docAbstract":"In this study, 1:250,000- and 1:24,000-scale digital soil databases for Kansas were compared statistically and spatially. The soil attributes used in this comparison were soil permeability, percent clay, and hydrologic group. Results indicate that, although the two databases were correlated, the potential exists for substantial site-specific variability between them. The largest differences between the two databases typically are in and along the stream networks. With distance away from the stream networks, the mean differences generally stabilize. The results also indicate the possibility of systematic bias between the two databases that varies with landscape position. For applications using mean soil attribute values, the two soil databases usually yield similar values for the three soil attributes analyzed, especially for areas of 25 km2 (9.7 mi2) or larger. However, for applications where more detailed information on soil variability and the spatial pattern of soil properties within the landscape is required, such as for studies focused on small areas or areas in and along stream networks, the two soil databases are sufficiently different such that using one or the other may result in substantially different results.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Soil and Water Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00224561","usgsCitation":"Juracek, K.E., and Wolock, D., 2002, Spatial and statistical differences between 1:250,000- and 1:24,000-scale digital soil databases: Journal of Soil and Water Conservation, v. 57, no. 2, p. 89-94.","startPage":"89","endPage":"94","numberOfPages":"6","costCenters":[],"links":[{"id":235684,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"57","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9430e4b08c986b31a900","contributors":{"authors":[{"text":"Juracek, K. E. 0000-0002-2102-8980","orcid":"https://orcid.org/0000-0002-2102-8980","contributorId":44570,"corporation":false,"usgs":true,"family":"Juracek","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":403876,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolock, D.M. 0000-0002-6209-938X","orcid":"https://orcid.org/0000-0002-6209-938X","contributorId":36601,"corporation":false,"usgs":true,"family":"Wolock","given":"D.M.","affiliations":[],"preferred":false,"id":403875,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025114,"text":"70025114 - 2002 - Advances in directional borehole radar data analysis and visualization","interactions":[],"lastModifiedDate":"2012-03-12T17:20:27","indexId":"70025114","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Advances in directional borehole radar data analysis and visualization","docAbstract":"The U.S. Geological Survey is developing a directional borehole radar (DBOR) tool for mapping fractures, lithologic changes, and underground utility and void detection. An important part of the development of the DBOR tool is data analysis and visualization, with the aim of making the software graphical user interface (GUI) intuitive and easy to use. The DBOR software system consists of a suite of signal and image processing routines written in Research Systems' Interactive Data Language (IDL). The software also serves as a front-end to many widely accepted Colorado School of Mines Center for Wave Phenomena (CWP) Seismic UNIX (SU) algorithms (Cohen and Stockwell, 2001). Although the SU collection runs natively in a UNIX environment, our system seamlessly emulates a UNIX session within a widely used PC operating system (MicroSoft Windows) using GNU tools (Noer, 1998). Examples are presented of laboratory data acquired with the prototype tool from two different experimental settings. The first experiment imaged plastic pipes in a macro-scale sand tank. The second experiment monitored the progress of an invasion front resulting from oil injection. Finally, challenges to further development and planned future work are discussed.","largerWorkTitle":"Proceedings of SPIE - The International Society for Optical Engineering","conferenceTitle":"9th International Conference on Ground Penetrating Radar","conferenceDate":"29 April 2002 through 2 May 2002","conferenceLocation":"Santa Barbara, CA","language":"English","doi":"10.1117/12.462230","issn":"0277786X","usgsCitation":"Smith, D., and Brown, P., 2002, Advances in directional borehole radar data analysis and visualization, <i>in</i> Proceedings of SPIE - The International Society for Optical Engineering, v. 4758, Santa Barbara, CA, 29 April 2002 through 2 May 2002, p. 251-255, https://doi.org/10.1117/12.462230.","startPage":"251","endPage":"255","numberOfPages":"5","costCenters":[],"links":[{"id":209370,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1117/12.462230"},{"id":235721,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4758","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e703e4b0c8380cd477c8","contributors":{"authors":[{"text":"Smith, D.V.G.","contributorId":57249,"corporation":false,"usgs":true,"family":"Smith","given":"D.V.G.","email":"","affiliations":[],"preferred":false,"id":403877,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brown, P.J. II 0000-0002-2415-7462","orcid":"https://orcid.org/0000-0002-2415-7462","contributorId":83723,"corporation":false,"usgs":true,"family":"Brown","given":"P.J.","suffix":"II","affiliations":[],"preferred":false,"id":403878,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025119,"text":"70025119 - 2002 - Evaluation of fish sampling using rotenone in a navigation lock","interactions":[],"lastModifiedDate":"2012-03-12T17:20:27","indexId":"70025119","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1661,"text":"Fisheries Research","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of fish sampling using rotenone in a navigation lock","docAbstract":"Annual sampling in locks with rotenone has been a principal means of assessing fish populations in the commercially navigable portions of the Ohio River. Despite extensive use, sampling in locks with rotenone and interpretation of the data obtained have not been adequately evaluated. The purpose of our study was to determine the degree of inter- and intraseasonal variation in lock samples, estimate correction factors (CFs) for fish recovery rates, and compare lock samples to other fish collections from the navigational pools above and below the lock. Lock samples from all seasons had a greater proportion of pelagic and demersal fish than samples from the navigational pools, which contained greater proportions of littoral species. CF for non-recovery of fish were determined. Spring and summer lock collections yielded several more species and estimates of overall fish biomass were an order of magnitude higher than fall collections. Within season variation between lock samples was relatively low; however, variation in lock samples among seasons was high, equivalent to that seen among the annual samples from the 1980s. Thus, single-season sampling may not be adequate, and fall may be the least preferred season.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Fisheries Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0165-7836(01)00298-3","issn":"01657836","usgsCitation":"Margraf, F., and Knight, C., 2002, Evaluation of fish sampling using rotenone in a navigation lock: Fisheries Research, v. 55, no. 1-3, p. 297-305, https://doi.org/10.1016/S0165-7836(01)00298-3.","startPage":"297","endPage":"305","numberOfPages":"9","costCenters":[],"links":[{"id":209400,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0165-7836(01)00298-3"},{"id":235802,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"55","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c74e4b0c8380cd52b5e","contributors":{"authors":[{"text":"Margraf, F.J.","contributorId":47738,"corporation":false,"usgs":true,"family":"Margraf","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":403889,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Knight, C.T.","contributorId":66042,"corporation":false,"usgs":true,"family":"Knight","given":"C.T.","email":"","affiliations":[],"preferred":false,"id":403890,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025034,"text":"70025034 - 2002 - Distribution and movement of shortnose sturgeon (Acipenser brevirostrum) in the Chesapeake Bay","interactions":[],"lastModifiedDate":"2022-01-12T15:48:32.545333","indexId":"70025034","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1583,"text":"Estuaries","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Distribution and movement of shortnose sturgeon (<i>Acipenser brevirostrum</i>) in the Chesapeake Bay","title":"Distribution and movement of shortnose sturgeon (Acipenser brevirostrum) in the Chesapeake Bay","docAbstract":"<p>During a reward program for Atlantic sturgeon (<i>Acipenser oxyrinchus</i>), 40 federally endangered shortnose sturgeon (<i>Acipenser brevirostrum</i>) were captured and reported by commercial fishers between January 1996 and January 2000 from the Chesapeake Bay. Since this is more than double the number of published records of shortnose sturgeon in the Chesapeake Bay between 1876 and 1995, little information has been available on distributions and movement. We used fishery dependent data collected during the reward program to determine the distribution of shortnose sturgeon in the Chesapeake Bay. Sonically-tagged shortnose sturgeon in the Chesapeake Bay and Delaware River were tracked to determine if individuals swim through the Chesapeake and Delaware Canal. Shortnose sturgeon were primarily distributed within the upper Chesapeake Bay. The movements of one individual, tagged within the Chesapeake Bay and later relocated in the canal and Delaware River, indicated that individuals traverse the Chesapeake and Delaware Canal.</p>","language":"English","publisher":"Springer","doi":"10.1007/BF02696053","usgsCitation":"Welsh, S., Mangold, M., Skjeveland, J., and Spells, A., 2002, Distribution and movement of shortnose sturgeon (Acipenser brevirostrum) in the Chesapeake Bay: Estuaries, v. 25, no. 1, p. 101-104, https://doi.org/10.1007/BF02696053.","productDescription":"4 p.","startPage":"101","endPage":"104","costCenters":[],"links":[{"id":232908,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Maryland, Virginia","otherGeospatial":"Chesapeake Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -76.44287109375,\n              39.32579941789298\n            ],\n            [\n              -76.607666015625,\n              38.91668153637508\n            ],\n            [\n              -76.9921875,\n              38.37611542403604\n            ],\n            [\n              -76.519775390625,\n              37.3002752813443\n            ],\n            [\n              -76.39892578125,\n              37.00255267215955\n            ],\n            [\n              -76.1572265625,\n              36.8708321556463\n            ],\n            [\n              -75.992431640625,\n              37.07271048132943\n            ],\n            [\n              -75.706787109375,\n              37.92686760148135\n            ],\n            [\n              -75.772705078125,\n              39.58875727696545\n            ],\n            [\n              -76.201171875,\n              39.487084981687495\n            ],\n            [\n              -76.44287109375,\n              39.32579941789298\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"25","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0298e4b0c8380cd50102","contributors":{"authors":[{"text":"Welsh, S.A. 0000-0003-0362-054X","orcid":"https://orcid.org/0000-0003-0362-054X","contributorId":10191,"corporation":false,"usgs":true,"family":"Welsh","given":"S.A.","affiliations":[],"preferred":false,"id":403528,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mangold, M.F.","contributorId":61600,"corporation":false,"usgs":true,"family":"Mangold","given":"M.F.","email":"","affiliations":[],"preferred":false,"id":403530,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Skjeveland, J.E.","contributorId":80224,"corporation":false,"usgs":true,"family":"Skjeveland","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":403531,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Spells, A.J.","contributorId":52365,"corporation":false,"usgs":true,"family":"Spells","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":403529,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025033,"text":"70025033 - 2002 - Radiocarbon dating, chronologic framework, and changes in accumulation rates of holocene estuarine sediments from Chesapeake Bay","interactions":[],"lastModifiedDate":"2017-08-16T10:31:43","indexId":"70025033","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Radiocarbon dating, chronologic framework, and changes in accumulation rates of holocene estuarine sediments from Chesapeake Bay","docAbstract":"Rapidly accumulating Holocene sediments in estuaries commonly are difficult to sample and date. In Chesapeake Bay, we obtained sediment cores as much as 20 m in length and used numerous radiocarbon ages measured by accelarator mass spectrometry methods to provide the first detailed chronologies of Holocene sediment accumulation in the bay. Carbon in these sediments is a complex mixture of materials from a variety of sources. Analyses of different components of the sediments show that total organic carbon ages are largely unreliable, because much of the carbon (including coal) has been transported to the bay from upstream sources and is older than sediments in which it was deposited. Mollusk shells (clams, oysters) and foraminifera appear to give reliable results, although reworking and burrowing are potential problems. Analyses of museum specimens collected alive before atmospheric nuclear testing suggest that the standard reservoir correction for marine samples is appropriate for middle to lower Chesapeake Bay. The biogenic carbonate radiocarbon ages are compatible with 210 Pb and 137 Cs data and pollen stratigraphy from the same sites. Post-settlement changes in sediment transport and accumulation is an important environmental issue in many estuaries, including the Chesapeake. Our data show that large variations in sediment mass accumulation rates occur among sites. At shallow water sites, local factors seem to control changes in accumulation rates with time. Our two relatively deep-water sites in the axial channel of the bay have different long-term average accumulation rates, but the history of sediment accumulation at these sites appears to reflect overall conditions in the bay. Mass accumulation rates at the two deep-water sites rapidly increased by about fourfold coincident with widespread land clearance for agriculture in the Chesapeake watershed.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1006/qres.2001.2285","issn":"00335894","usgsCitation":"Colman, S.M., Baucom, P., Bratton, J., Cronin, T.M., McGeehin, J., Willard, D., Zimmerman, A., and Vogt, P., 2002, Radiocarbon dating, chronologic framework, and changes in accumulation rates of holocene estuarine sediments from Chesapeake Bay: Quaternary Research, v. 57, no. 1, p. 58-79, https://doi.org/10.1006/qres.2001.2285.","productDescription":"22 p.","startPage":"58","endPage":"79","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":232907,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":207730,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1006/qres.2001.2285"}],"volume":"57","issue":"1","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a93e2e4b0c8380cd810aa","contributors":{"authors":[{"text":"Colman, Steven M. 0000-0002-0564-9576","orcid":"https://orcid.org/0000-0002-0564-9576","contributorId":77482,"corporation":false,"usgs":true,"family":"Colman","given":"Steven","email":"","middleInitial":"M.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":403525,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baucom, P.C.","contributorId":77978,"corporation":false,"usgs":true,"family":"Baucom","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":403526,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bratton, J.F.","contributorId":94354,"corporation":false,"usgs":true,"family":"Bratton","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":403527,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cronin, T. M. 0000-0002-2643-0979","orcid":"https://orcid.org/0000-0002-2643-0979","contributorId":42613,"corporation":false,"usgs":true,"family":"Cronin","given":"T.","email":"","middleInitial":"M.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":false,"id":403521,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McGeehin, J. P. 0000-0002-5320-6091","orcid":"https://orcid.org/0000-0002-5320-6091","contributorId":48593,"corporation":false,"usgs":true,"family":"McGeehin","given":"J. P.","affiliations":[],"preferred":false,"id":403522,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Willard, D. 0000-0003-4878-0942","orcid":"https://orcid.org/0000-0003-4878-0942","contributorId":67676,"corporation":false,"usgs":true,"family":"Willard","given":"D.","affiliations":[],"preferred":false,"id":403523,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Zimmerman, A.R.","contributorId":71732,"corporation":false,"usgs":true,"family":"Zimmerman","given":"A.R.","email":"","affiliations":[],"preferred":false,"id":403524,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Vogt, P.R.","contributorId":38312,"corporation":false,"usgs":true,"family":"Vogt","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":403520,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70025015,"text":"70025015 - 2002 - Comparison of the basin-scale effect of dredging operations and natural estuarine processes on suspended sediment concentration","interactions":[],"lastModifiedDate":"2016-07-27T13:38:58","indexId":"70025015","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1583,"text":"Estuaries","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of the basin-scale effect of dredging operations and natural estuarine processes on suspended sediment concentration","docAbstract":"<p>Suspended sediment concentration (SSC) data from San Pablo Bay, California, were analyzed to compare the basin-scale effect of dredging and disposal of dredged material (dredging operations) and natural estuarine processes. The analysis used twelve 3-wk to 5-wk periods of mid-depth and near-bottom SSC data collected at Point San Pablo every 15 min from 1993-1998. Point San Pablo is within a tidal excursion of a dredged-material disposal site. The SSC data were compared to dredging volume, Julian day, and hydrodynamic and meteorological variables that could affect SSC. Kendall's ??, Spearman's ??, and weighted (by the fraction of valid data in each period) Spearman's ??w correlation coefficients of the variables indicated which variables were significantly correlated with SSC. Wind-wave resuspension had the greatest effect on SSC. Median water-surface elevation was the primary factor affecting mid-depth SSC. Greater depths inhibit wind-wave resuspension of bottom sediment and indicate greater influence of less turbid water from down estuary. Seasonal variability in the supply of erodible sediment is the primary factor affecting near-bottom SSC. Natural physical processes in San Pablo Bay are more areally extensive, of equal or longer duration, and as frequent as dredging operations (when occurring), and they affect SSC at the tidal time scale. Natural processes control SSC at Point San Pablo even when dredging operations are occurring.</p>","language":"English","publisher":"Springer","doi":"10.1007/BF02695990","issn":"01608347","usgsCitation":"Schoellhamer, D., 2002, Comparison of the basin-scale effect of dredging operations and natural estuarine processes on suspended sediment concentration: Estuaries, v. 25, no. 3, p. 488-495, https://doi.org/10.1007/BF02695990.","productDescription":"8 p.","startPage":"488","endPage":"495","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":233188,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Pablo Bay","volume":"25","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f898e4b0c8380cd4d1eb","contributors":{"authors":[{"text":"Schoellhamer, D. H. 0000-0001-9488-7340","orcid":"https://orcid.org/0000-0001-9488-7340","contributorId":85624,"corporation":false,"usgs":true,"family":"Schoellhamer","given":"D. H.","affiliations":[],"preferred":false,"id":403454,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025007,"text":"70025007 - 2002 - Paleoecology of a Northern Michigan Lake and the relationship among climate, vegetation, and Great Lakes water levels","interactions":[],"lastModifiedDate":"2019-06-05T09:28:33","indexId":"70025007","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Paleoecology of a Northern Michigan Lake and the relationship among climate, vegetation, and Great Lakes water levels","docAbstract":"<div class=\"row\"><div class=\"large-10 medium-10 small-12 columns\"><div class=\"description\"><div class=\"abstract\" data-abstract-type=\"normal\"><p>We reconstructed Holocene water-level and vegetation dynamics based on pollen and plant macrofossils from a coastal lake in Upper Michigan. Our primary objective was to test the hypothesis that major fluctuations in Great Lakes water levels resulted in part from climatic changes. We also used our data to provide temporal constraints to the mid-Holocene dry period in Upper Michigan. From 9600 to 8600 cal yr B.P. a shallow, lacustrine environment characterized the Mud Lake basin. A<span>&nbsp;</span><span class=\"italic\">Sphagnum</span>-dominated wetland occupied the basin during the mid-Holocene dry period (∼8600 to 6600 cal yr B.P.). The basin flooded at 6600 cal yr B.P. as a result of rising water levels associated with the onset of the Nipissing I phase of ancestral Lake Superior. This flooding event occurred contemporaneously with a well-documented regional expansion of<span>&nbsp;</span><span class=\"italic\">Tsuga</span>.<span>&nbsp;</span><span class=\"italic\">Betula</span><span>&nbsp;</span>pollen increased during the Nipissing II phase (4500 cal yr B.P.). Macrofossil evidence from Mud Lake suggests that<span>&nbsp;</span><span class=\"italic\">Betula alleghaniensis</span><span>&nbsp;</span>expansion was primarily responsible for the rising<span>&nbsp;</span><span class=\"italic\">Betula</span><span>&nbsp;</span>pollen percentages. Major regional and local vegetational changes were associated with all the major Holocene highstands of the western Great Lakes (Nipissing I, Nipissing II, and Algoma). Traditional interpretations of Great Lakes water-level history should be revised to include a major role of climate.</p></div></div></div></div>","language":"English","publisher":"Cambridge University Press","doi":"10.1006/qres.2001.2288","issn":"00335894","usgsCitation":"Booth, R., Jackson, S., and Thompson, T., 2002, Paleoecology of a Northern Michigan Lake and the relationship among climate, vegetation, and Great Lakes water levels: Quaternary Research, v. 57, no. 1, p. 120-130, https://doi.org/10.1006/qres.2001.2288.","productDescription":"11 p.","startPage":"120","endPage":"130","numberOfPages":"11","costCenters":[],"links":[{"id":233080,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"57","issue":"1","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a73d9e4b0c8380cd772ac","contributors":{"authors":[{"text":"Booth, R.K.","contributorId":47122,"corporation":false,"usgs":true,"family":"Booth","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":403412,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jackson, S.T.","contributorId":90072,"corporation":false,"usgs":true,"family":"Jackson","given":"S.T.","email":"","affiliations":[],"preferred":false,"id":403414,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thompson, T.A.","contributorId":73226,"corporation":false,"usgs":true,"family":"Thompson","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":403413,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025004,"text":"70025004 - 2002 - Early to Middle Proterozoic construction of the Mojave province, southwestern United States","interactions":[],"lastModifiedDate":"2022-01-21T16:02:21.065046","indexId":"70025004","displayToPublicDate":"2002-01-01T00:00:00","publicationYear":"2002","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1848,"text":"Gondwana Research","active":true,"publicationSubtype":{"id":10}},"title":"Early to Middle Proterozoic construction of the Mojave province, southwestern United States","docAbstract":"Zircon and monazite U-Pb geochronology of rocks in the western Mojave province of the southwest US reveals that the Proterozoic arc exposed there shares an intrusive and deformational history with rocks exposed further east in the Yavapai and Mazatzal belts after approximately 1780 Ma. Consequently, it seems likely that the Mojave province was contiguous with these other Laurentian provinces by that time. Isotopic and geochronologic data also suggest that Mojave province plutonic rocks inherit their distinctive isotopic compositions, at least in part, from an enriched lithospheric mantle source and interaction with sedimentary rocks containing Archean detritus.","language":"English","publisher":"ScienceDirect","doi":"10.1016/S1342-937X(05)70890-X","usgsCitation":"Coleman, D., Barth, A.P., and Wooden, J.L., 2002, Early to Middle Proterozoic construction of the Mojave province, southwestern United States: Gondwana Research, v. 5, no. 1, p. 75-78, https://doi.org/10.1016/S1342-937X(05)70890-X.","productDescription":"4 p.","startPage":"75","endPage":"78","costCenters":[],"links":[{"id":233045,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona, California, Colorado, Nevada, New Mexico, Utah","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -120.62988281249999,\n              34.016241889667015\n            ],\n            [\n              -118.95996093749999,\n              33.247875947924385\n            ],\n            [\n              -117.42187500000001,\n              32.39851580247402\n            ],\n            [\n              -114.9169921875,\n              32.54681317351514\n            ],\n            [\n              -110.8740234375,\n              31.353636941500987\n            ],\n            [\n              -108.10546875,\n              31.42866311735861\n            ],\n            [\n              -107.75390625,\n              31.653381399664\n            ],\n            [\n              -104.32617187499999,\n              31.87755764334002\n            ],\n            [\n              -104.2822265625,\n              35.02999636902566\n            ],\n            [\n              -104.2822265625,\n              38.47939467327645\n            ],\n            [\n              -123.26660156249999,\n              38.44498466889473\n            ],\n            [\n              -120.62988281249999,\n              34.016241889667015\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0491e4b0c8380cd50a72","contributors":{"authors":[{"text":"Coleman, D.S.","contributorId":57607,"corporation":false,"usgs":true,"family":"Coleman","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":403406,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barth, A. P.","contributorId":16997,"corporation":false,"usgs":true,"family":"Barth","given":"A.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":403405,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wooden, J. L.","contributorId":58678,"corporation":false,"usgs":true,"family":"Wooden","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":403407,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}