{"pageNumber":"3491","pageRowStart":"87250","pageSize":"25","recordCount":184938,"records":[{"id":70021147,"text":"70021147 - 1998 - Effects of a clear-cut harvest on soil respiration in a jack pine - Lichen woodland","interactions":[],"lastModifiedDate":"2018-01-30T20:51:22","indexId":"70021147","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1170,"text":"Canadian Journal of Forest Research","active":true,"publicationSubtype":{"id":10}},"title":"Effects of a clear-cut harvest on soil respiration in a jack pine - Lichen woodland","docAbstract":"Quantification of the components of ecosystem respiration is essential to understanding carbon (C) cycling of natural and disturbed landscapes. Soil respiration, which includes autotrophic and heterotrophic respiration from throughout the soil profile, is the second largest flux in the global carbon cycle. We measured soil respiration (soil CO2 emission) at an undisturbed mature jack pine (Pinus banksiana Lamb.) stand in Saskatchewan (old jack pine, OJP), and at a formerly continuous portion of the stand that was clear-cut during the previous winter (clear-cut, CC). Tree harvesting reduced soil CO2 emission from ???22.5 to ???9.1 mol CO2??m2 for the 1994 growing season. OJP was a small net sink of atmospheric CO2, while CC was a net source of CO2. Winter emissions were similar at both sites. Reduction of soil respiration was attributed to disruption of the soil surface and to the death of tree roots. Flux simulations for CC and OJP identify 40% of CO2 emission at the undisturbed OJP site as near-surface respiration, 25% as deep-soil respiration, and 35% as tree-root respiration. The near-surface component was larger than the estimated annual C input to soil, suggesting fast C turnover and no net C accumulation in these boreal uplands in 1994.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Canadian Journal of Forest Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00455067","usgsCitation":"Striegl, R.G., and Wickland, K., 1998, Effects of a clear-cut harvest on soil respiration in a jack pine - Lichen woodland: Canadian Journal of Forest Research, v. 28, no. 4, p. 534-539.","startPage":"534","endPage":"539","numberOfPages":"6","costCenters":[],"links":[{"id":230094,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"28","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a066ce4b0c8380cd51233","contributors":{"authors":[{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":false,"id":388801,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wickland, K.P. 0000-0002-6400-0590","orcid":"https://orcid.org/0000-0002-6400-0590","contributorId":10786,"corporation":false,"usgs":true,"family":"Wickland","given":"K.P.","affiliations":[],"preferred":false,"id":388800,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021148,"text":"70021148 - 1998 - Orogenic gold deposits: a proposed classification in the context of their crustal distribution and relationship to other gold deposit types","interactions":[],"lastModifiedDate":"2012-03-12T17:19:49","indexId":"70021148","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2954,"text":"Ore Geology Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Orogenic gold deposits: a proposed classification in the context of their crustal distribution and relationship to other gold deposit types","docAbstract":"The so-called 'mesothermal' gold deposits are associated with reginally metamorphosed terranes of all ages. Ores were formed during compressional to transpressional deformation processes at convergent plate margins in accretionary and collisional orogens. In both types of orogen, hydrated marine sedimentary and volcanic rocks have been added to continental margins during tens to some 100 million years of collision. Subduction-related thermal events, episodically raising geothermal gradients within the hydrated accretionary sequences, initiate and drive long-distance hydrothermal fluid migration. The resulting gold-bearing quartz veins are emplaced over a unique depth range for hydrothermal ore deposits, with gold deposition from 15-20 km to the near surface environment. On the basis of this broad depth range of formation, the term 'mesothermal' is not applicable to this deposit types as a whole. Instead, the unique temporal and spatial association of this deposit type with orogeny means that the vein systems are best termed orogenic gold deposits. Most ores are post-orogenic with respect to to tectonism of their immediate host rocks, but are simultaneously syn-orogenic with respect to ongoing deep-crustal, subduction-related thermal processes and the prefix orogenic satisfies both these conditions. On the basis of their depth of formation, the orogenic deposits are best subdivided into epizonal (<6 km), mesozonal (6-12 km) and hypozonal (>12 km) classes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ore Geology Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0169-1368(97)00012-7","issn":"01691368","usgsCitation":"Groves, D., Goldfarb, R., Gebre-Mariam, M., Hagemann, S., and Robert, F., 1998, Orogenic gold deposits: a proposed classification in the context of their crustal distribution and relationship to other gold deposit types: Ore Geology Reviews, v. 13, no. 1-5, p. 7-27, https://doi.org/10.1016/S0169-1368(97)00012-7.","startPage":"7","endPage":"27","numberOfPages":"21","costCenters":[],"links":[{"id":206521,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0169-1368(97)00012-7"},{"id":230095,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"1-5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7124e4b0c8380cd764a3","contributors":{"authors":[{"text":"Groves, D.I.","contributorId":73616,"corporation":false,"usgs":true,"family":"Groves","given":"D.I.","email":"","affiliations":[],"preferred":false,"id":388804,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Goldfarb, R.J.","contributorId":38143,"corporation":false,"usgs":true,"family":"Goldfarb","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":388803,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gebre-Mariam, M.","contributorId":80030,"corporation":false,"usgs":true,"family":"Gebre-Mariam","given":"M.","email":"","affiliations":[],"preferred":false,"id":388805,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hagemann, S.G.","contributorId":95647,"corporation":false,"usgs":true,"family":"Hagemann","given":"S.G.","email":"","affiliations":[],"preferred":false,"id":388806,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Robert, F.","contributorId":25725,"corporation":false,"usgs":true,"family":"Robert","given":"F.","email":"","affiliations":[],"preferred":false,"id":388802,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70020729,"text":"70020729 - 1998 - Methodology and implications of maximum paleodischarge estimates for mountain channels, upper Animas River basin, Colorado, U.S.A.","interactions":[],"lastModifiedDate":"2023-03-06T16:24:24.981687","indexId":"70020729","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":898,"text":"Arctic and Alpine Research","active":true,"publicationSubtype":{"id":10}},"title":"Methodology and implications of maximum paleodischarge estimates for mountain channels, upper Animas River basin, Colorado, U.S.A.","docAbstract":"Historical and geologic records may be used to enhance magnitude estimates for extreme floods along mountain channels, as demonstrated in this study from the San Juan Mountains of Colorado. Historical photographs and local newspaper accounts from the October 1911 flood indicate the likely extent of flooding and damage. A checklist designed to organize and numerically score evidence of flooding was used in 15 field reconnaissance surveys in the upper Animas River valley of southwestern Colorado. Step-backwater flow modeling estimated the discharges necessary to create longitudinal flood bars observed at 6 additional field sites. According to these analyses, maximum unit discharge peaks at approximately 1.3 m3 s-1 km-2 around 2200 m elevation, with decreased unit discharges at both higher and lower elevations. These results (1) are consistent with Jarrett's (1987, 1990, 1993) maximum 2300-m elevation limit for flash-flooding in the Colorado Rocky Mountains, and (2) suggest that current Probable Maximum Flood (PMF) estimates based on a 24-h rainfall of 30 cm at elevations above 2700 m are unrealistically large. The methodology used for this study should be readily applicable to other mountain regions where systematic streamflow records are of short duration or nonexistent.","language":"English","publisher":"Taylor & Francis","doi":"10.2307/1551744","usgsCitation":"Pruess, J., Wohl, E.E., and Jarrett, R.D., 1998, Methodology and implications of maximum paleodischarge estimates for mountain channels, upper Animas River basin, Colorado, U.S.A.: Arctic and Alpine Research, v. 30, no. 1, p. 40-50, https://doi.org/10.2307/1551744.","productDescription":"11 p.","startPage":"40","endPage":"50","numberOfPages":"11","costCenters":[],"links":[{"id":231197,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Upper Animas River basin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -108.06948821876755,\n              37.1\n            ],\n            [\n              -107.5,\n              37.1\n            ],\n            [\n              -107.5,\n              38\n            ],\n            [\n              -108.06948821876755,\n              38\n            ],\n            [\n              -108.06948821876755,\n              37.1\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"30","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a556ce4b0c8380cd6d1e6","contributors":{"authors":[{"text":"Pruess, J.","contributorId":44308,"corporation":false,"usgs":true,"family":"Pruess","given":"J.","email":"","affiliations":[],"preferred":false,"id":387292,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wohl, Ellen E.","contributorId":16969,"corporation":false,"usgs":true,"family":"Wohl","given":"Ellen","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":387290,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jarrett, Robert D. rjarrett@usgs.gov","contributorId":2260,"corporation":false,"usgs":true,"family":"Jarrett","given":"Robert","email":"rjarrett@usgs.gov","middleInitial":"D.","affiliations":[],"preferred":true,"id":387291,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020663,"text":"70020663 - 1998 - CRUST 5.1: A global crustal model at 5° x 5°","interactions":[],"lastModifiedDate":"2020-05-18T14:06:20.58357","indexId":"70020663","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"CRUST 5.1: A global crustal model at 5° x 5°","docAbstract":"<p>We present a new global model for the Earth's crust based on seismic refraction data published in the period 1948-1995 and a detailed compilation of ice and sediment thickness. An extensive compilation of seismic refraction measurements has been used to determine the crustal structure on continents and their margins. Oceanic crust is modeled with both a standard model for normal oceanic crust, and variants for nonstandard regions, such as oceanic plateaus. Our model (CRUST 5.1) consists of 2592 5° × 5° tiles in which the crust and uppermost mantle are described by eight layers: (1) ice, (2) water, (3) soft sediments, (4) hard sediments, (5) crystalline upper, (6) middle, (7) lower crust, and (8) uppermost mantle. Topography and bathymetry are adopted from a Mandard database (ETOPO-5). Compressional wave velocity in each layer is based on field measurements, and shear wave velocity and density are estimated using recently published empirical V<sub>p</sub>-V<sub>s</sub><span>&nbsp;</span>and V<sub>p</sub><span>&nbsp;</span>-density relationships. The crustal model differs from previous models in that (1) the thickness and seismic/density structure of sedimentary basins is accounted for more completely, (2) the velocity structure of unmeasured regions is estimated using statistical averages that are based on a significantly larger database of crustal structure, (3) the compressional wave, shear wave, and density structure have been explicitly specified using newly available constraints from field and laboratory studies. Thus - this global crustal model is based on substantially more data than previous models and differs from them in many important respects. A new map of the thickness of the Earth's crust is presented, and we illustrate the application of this model by using it to provide the crustal correction for surface wave phase velocity maps. Love waves at 40 s are dominantly sensitive to crustal structure, and there is a very close correspondence between observed phase velocities at this period and those predicted by CRUST 5.1. We find that the application of crustal corrections to long-period (167 s) Rayleigh waves significantly increases the variance in the phase velocity maps and strengthens the upper mantle , velocity anomalies beneath stable continental regions. A simple calculation of crustal isostacy indicates significant lateral variations in upper mantle density. The model CRUST 5.1 provides a complete description of the physical properties of the Earth's crust at a scale of 5° × 5° and can be used for a wide range of seismological and nonseismological problems.</p>","language":"English","publisher":"AGU Publications","doi":"10.1029/97JB02122","issn":"01480227","usgsCitation":"Mooney, W.D., Laske, G., and Masters, T.G., 1998, CRUST 5.1: A global crustal model at 5° x 5°: Journal of Geophysical Research B: Solid Earth, v. 103, no. 1, p. 727-747, https://doi.org/10.1029/97JB02122.","productDescription":"21 p.","startPage":"727","endPage":"747","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":231382,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"103","issue":"1","noUsgsAuthors":false,"publicationDate":"1998-01-10","publicationStatus":"PW","scienceBaseUri":"5059f2e6e4b0c8380cd4b484","contributors":{"authors":[{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":387050,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Laske, Gabi","contributorId":69324,"corporation":false,"usgs":true,"family":"Laske","given":"Gabi","email":"","affiliations":[],"preferred":false,"id":387049,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Masters, T. Guy","contributorId":93191,"corporation":false,"usgs":true,"family":"Masters","given":"T.","email":"","middleInitial":"Guy","affiliations":[],"preferred":false,"id":387051,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020732,"text":"70020732 - 1998 - Tsivat Basin conduit system persists through two surges, Bering Piedmont Glacier, Alaska","interactions":[],"lastModifiedDate":"2023-12-20T13:25:59.0231","indexId":"70020732","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Tsivat Basin conduit system persists through two surges, Bering Piedmont Glacier, Alaska","docAbstract":"<p>The 1993–1995 surge of Bering Glacier, Alaska, occurred in two distinct phases. Phase 1 of the surge began on the eastern sector in July, 1993 and ended in July, 1994 after a powerful outburst of subglacial meltwater into Tsivat Lake basin on the north side of Weeping Peat Island. Within days, jökulhlaup discharge built a 1.5 km<sup>2</sup><span>&nbsp;</span>delta of ice blocks (25–30 m) buried in outwash. By late October 1994, discharge temporarily shifted to a vent on Weeping Peat Island, where a second smaller outburst dissected the island and built two new sandar. During phase 2, which began in spring 1995 and ended within five months, continuous discharge issued from several vents along the ice front on Weeping Peat Island before returning to the Tsivat Basin.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1998)110<0877:TBCSPT>2.3.CO;2","issn":"00167606","usgsCitation":"Fleisher, P., Cadwell, D., and Muller, E., 1998, Tsivat Basin conduit system persists through two surges, Bering Piedmont Glacier, Alaska: Geological Society of America Bulletin, v. 110, no. 7, p. 877-887, https://doi.org/10.1130/0016-7606(1998)110<0877:TBCSPT>2.3.CO;2.","productDescription":"11 p.","startPage":"877","endPage":"887","numberOfPages":"11","costCenters":[],"links":[{"id":231237,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Bering Piedmont Glacier","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -147.39247492816136,\n              63.2991286669656\n            ],\n            [\n              -147.39247492816136,\n              59.807561616451096\n            ],\n            [\n              -140.1854436781614,\n              59.807561616451096\n            ],\n            [\n              -140.1854436781614,\n              63.2991286669656\n            ],\n            [\n              -147.39247492816136,\n              63.2991286669656\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"110","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb8a3e4b08c986b32799e","contributors":{"authors":[{"text":"Fleisher, P.J.","contributorId":70664,"corporation":false,"usgs":true,"family":"Fleisher","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":387308,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cadwell, D.H.","contributorId":97552,"corporation":false,"usgs":true,"family":"Cadwell","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":387309,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Muller, E.H.","contributorId":35350,"corporation":false,"usgs":true,"family":"Muller","given":"E.H.","email":"","affiliations":[],"preferred":false,"id":387307,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70021084,"text":"70021084 - 1998 - Anorogenic nature of magmatism in the Northern Baikal volcanic belt: Evidence from geochemical, geochronological (U-Pb), and isotopic (Pb, Nd) data","interactions":[],"lastModifiedDate":"2013-03-17T21:47:27","indexId":"70021084","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3043,"text":"Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Anorogenic nature of magmatism in the Northern Baikal volcanic belt: Evidence from geochemical, geochronological (U-Pb), and isotopic (Pb, Nd) data","docAbstract":"The Northern Baikal volcanic belt has an age of 1.82-1.87 Ga and extends along the boundary between the Siberian Platform and the Baikal foldbelt. The volcanic belt is composed of volcanics of the Akitkan Group and granitic rocks of the Irel and Primorsk complexes. The geochemistry of the rocks points to the intraplate anorogenic nature of the belt. U-Pb zircon dating of the Chuya granitoids revealed that they are older (2020-2060 Ma) than the Northern Baikal volcanic belt and, thus, cannot be regarded as its component. Data on the Pb isotopic system of feldspars from the granitoids confirm the contemporaneity of all volcanic rocks of the belt except the volcanics of the upper portion of the Akitkan Group (Chaya Formation). Our data suggest its possibly younger (???1.3 Ga) age. The isotopic Nd and Pb compositions of the acid volcanic rocks provide evidence of the heterogeneity of their crustal protoliths. The volcanics of the Malaya Kosa Formation have ??Nd(T) = -6.1, ??2 = 9.36, and were most probably produced with the participation of the U-depleted lower continental crust of Archean age. Other rocks of the complex show ??Nd(T) from -0.1 to -2.4, ??2 = 9.78, and could have been formed by the recycling of the juvenile crust. The depletion of the Malaya Kosa volcanics in most LILEs and HFSEs compared with other acid igneous rocks of the belt possibly reflects compositional differences between the Late Archean and Early Proterozoic crustal sources. The basaltic rocks of the Malaya Kosa Formation (??Nd varies from -4.6 to -5.4) were produced by either the melting of the enriched lithospheric mantle or the contamination of derivatives of the depleted mantle by Early Archean lower crustal rocks, which are not exposed within the area. Copyright ?? 1998 by MAEe Cyrillic signK Hay??a/Interperiodica Publishing.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Petrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"08695911","usgsCitation":"Neymark, L., Larin, A., Nemchin, A., Ovchinnikova, G., and Rytsk, E.Y., 1998, Anorogenic nature of magmatism in the Northern Baikal volcanic belt: Evidence from geochemical, geochronological (U-Pb), and isotopic (Pb, Nd) data: Petrology, v. 6, no. 2, p. 124-148.","startPage":"124","endPage":"148","numberOfPages":"25","costCenters":[],"links":[{"id":229772,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec4de4b0c8380cd491ac","contributors":{"authors":[{"text":"Neymark, L.A. 0000-0003-4190-0278","orcid":"https://orcid.org/0000-0003-4190-0278","contributorId":56673,"corporation":false,"usgs":true,"family":"Neymark","given":"L.A.","affiliations":[],"preferred":false,"id":388596,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Larin, A.M.","contributorId":59965,"corporation":false,"usgs":true,"family":"Larin","given":"A.M.","affiliations":[],"preferred":false,"id":388597,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nemchin, A.A.","contributorId":10175,"corporation":false,"usgs":true,"family":"Nemchin","given":"A.A.","email":"","affiliations":[],"preferred":false,"id":388594,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ovchinnikova, G.V.","contributorId":74898,"corporation":false,"usgs":true,"family":"Ovchinnikova","given":"G.V.","email":"","affiliations":[],"preferred":false,"id":388598,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rytsk, E. Yu","contributorId":10574,"corporation":false,"usgs":true,"family":"Rytsk","given":"E.","email":"","middleInitial":"Yu","affiliations":[],"preferred":false,"id":388595,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70021082,"text":"70021082 - 1998 - A decision support model to assess vulnerability to salt water intrusion in the great bend prairie aquifer of Kansas","interactions":[],"lastModifiedDate":"2024-03-07T11:54:38.695071","indexId":"70021082","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3825,"text":"Groundwater","active":true,"publicationSubtype":{"id":10}},"title":"A decision support model to assess vulnerability to salt water intrusion in the great bend prairie aquifer of Kansas","docAbstract":"<div class=\"abstract-group \"><div class=\"article-section__content en main\"><p>A relatively simple ground water decision support system (DSS) was developed to assist in identifying salt-water vulnerable areas and in developing management policies to prevent salt-water intrusion in central Kansas. The DSS is based on a combination of numerical modeling sensitivity analyses, multiple regression analyses, and classification procedures derived from our knowledge of the area. Six ground water salinity models are proposed to evaluate irrigation well permit applications. The choice of model depends on the availability of site-specific data. The DSS takes advantage of GIS database management procedures, and is applied to an actual salt-water intrusion problem site in south-central Kansas. This approach can help local ground water management districts make better decisions on protecting ground water use in salt water vulnerable areas.</p></div></div>","language":"English","publisher":"National Groundwater Association","doi":"10.1111/j.1745-6584.1998.tb02819.x","issn":"0017467X","usgsCitation":"Sophocleous, M., and Ma, T., 1998, A decision support model to assess vulnerability to salt water intrusion in the great bend prairie aquifer of Kansas: Groundwater, v. 36, no. 3, p. 476-483, https://doi.org/10.1111/j.1745-6584.1998.tb02819.x.","productDescription":"8 p.","startPage":"476","endPage":"483","numberOfPages":"8","costCenters":[],"links":[{"id":229734,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"3","noUsgsAuthors":false,"publicationDate":"2005-12-23","publicationStatus":"PW","scienceBaseUri":"5059e3aae4b0c8380cd4616f","contributors":{"authors":[{"text":"Sophocleous, M.","contributorId":13373,"corporation":false,"usgs":true,"family":"Sophocleous","given":"M.","email":"","affiliations":[],"preferred":false,"id":388590,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ma, T.","contributorId":33870,"corporation":false,"usgs":true,"family":"Ma","given":"T.","email":"","affiliations":[],"preferred":false,"id":388591,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70162653,"text":"70162653 - 1998 - Imperilled wetlands - Book review: Mangroves and saltmarshes","interactions":[],"lastModifiedDate":"2016-04-20T11:54:26","indexId":"70162653","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Imperilled wetlands - Book review: Mangroves and saltmarshes","docAbstract":"<p>Review info:<i>&nbsp;Mangroves and saltmarshes.</i><span>&nbsp;Edited by Eric Wolanski and Charles S. Hopkinson Jr., 1996.</span></p>","language":"English","publisher":"Nature Publishing Group","doi":"10.1038/25898","usgsCitation":"Smith, T.J., 1998, Imperilled wetlands - Book review: Mangroves and saltmarshes: Nature, v. 395, p. 131-132, https://doi.org/10.1038/25898.","productDescription":"2 p.","startPage":"131","endPage":"132","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"links":[{"id":314973,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"395","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56ab49c8e4b07ca61bfea567","contributors":{"authors":[{"text":"Smith, Thomas J. III tom_j_smith@usgs.gov","contributorId":1615,"corporation":false,"usgs":true,"family":"Smith","given":"Thomas","suffix":"III","email":"tom_j_smith@usgs.gov","middleInitial":"J.","affiliations":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"preferred":false,"id":590059,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70020734,"text":"70020734 - 1998 - Cotton herbicides in the surface waters of the Mississippi Alluvial Plain (the Delta)","interactions":[],"lastModifiedDate":"2012-03-12T17:20:19","indexId":"70020734","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Cotton herbicides in the surface waters of the Mississippi Alluvial Plain (the Delta)","docAbstract":"The U.S. Geological Survey is conducting two studies to assess the environmental fate of herbicides used in cotton producing areas of the southeastern United States. The first study is evaluating surface-water quality on a regional basis and relating water quality to land use. The second study is examining the use of Best Management Practices to reduce off-site movement of agricultural chemicals in surface-water runoff. Maximum concentrations of the herbicides fluometuron and norflurazon in samples from surface water in edge-of-field studies were 23 and 7 micrograms per liter, respectively. Also, they were detected in the runoff of nearly every sampled storm for the 1997 water year at concentrations higher than 1.0 microgram per liter. Fluometuron and norflurazon were measured frequently in samples from rivers and streams in cotton producing areas, but the frequency of occurrence and the maximum concentrations were less than those in the edge-of-field studies.","largerWorkTitle":"International Water Resources Engineering Conference - Proceedings","conferenceTitle":"Proceedings of the 1998 International Water Resources Engineering Conference. Part 2 (of 2)","conferenceDate":"3 August 1998 through 7 August 1998","conferenceLocation":"Memphis, TN, USA","language":"English","publisher":"ASCE","publisherLocation":"Reston, VA, United States","usgsCitation":"Coupe, R., and Rebich, R., 1998, Cotton herbicides in the surface waters of the Mississippi Alluvial Plain (the Delta), <i>in</i> International Water Resources Engineering Conference - Proceedings, v. 2, Memphis, TN, USA, 3 August 1998 through 7 August 1998, p. 1212-1217.","startPage":"1212","endPage":"1217","numberOfPages":"6","costCenters":[],"links":[{"id":231278,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fc7fe4b0c8380cd4e2ab","contributors":{"authors":[{"text":"Coupe, R.H.","contributorId":84778,"corporation":false,"usgs":true,"family":"Coupe","given":"R.H.","affiliations":[],"preferred":false,"id":387314,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rebich, R.A.","contributorId":20788,"corporation":false,"usgs":true,"family":"Rebich","given":"R.A.","affiliations":[],"preferred":false,"id":387313,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020657,"text":"70020657 - 1998 - Trophic transfer of methyl mercury in the northern Florida Everglades","interactions":[],"lastModifiedDate":"2019-02-04T08:05:02","indexId":"70020657","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1007,"text":"Biogeochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Trophic transfer of methyl mercury in the northern Florida Everglades","docAbstract":"There are spatial differences in methyl mercury (MeHg) concentrations in biota in Water Conservation Areas 2 and 3 in the Everglades, with higher concentrations generally found in the southern areas. Fish and hemipterans had the most MeHg on a wet weight basis, with levels exceeding 30 ng g-1. The magnitude of MeHg accumulation in biota varies seasonally and does not always appear to be associated with changes in water column concentration. This is exemplified by periphyton, the base of the foodweb in the Everglades, at a high nutrient sampling site. Although limited in scope, MeHg concentrations presented for biota provide insight into beginning to understand the dynamic nature of Hg transfer in the Everglades foodweb on a spatial and temporal basis.","language":"English","publisher":"Springer","doi":"10.1023/A:1005918101773","issn":"01682563","usgsCitation":"Cleckner, L., Garrison, P., Hurley, J., Olson, M., and Krabbenhoft, D., 1998, Trophic transfer of methyl mercury in the northern Florida Everglades: Biogeochemistry, v. 40, no. 2-3, p. 347-361, https://doi.org/10.1023/A:1005918101773.","productDescription":"15 p.","startPage":"347","endPage":"361","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":231233,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb88ee4b08c986b327914","contributors":{"authors":[{"text":"Cleckner, L.B.","contributorId":29966,"corporation":false,"usgs":true,"family":"Cleckner","given":"L.B.","email":"","affiliations":[],"preferred":false,"id":387031,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garrison, P.J.","contributorId":86072,"corporation":false,"usgs":true,"family":"Garrison","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":387032,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hurley, J.P.","contributorId":97645,"corporation":false,"usgs":true,"family":"Hurley","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":387034,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Olson, M.L.","contributorId":21989,"corporation":false,"usgs":true,"family":"Olson","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":387030,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Krabbenhoft, D. P. 0000-0003-1964-5020","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":90765,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"D. P.","affiliations":[],"preferred":false,"id":387033,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70020656,"text":"70020656 - 1998 - Review of magnetic field monitoring near active faults and volcanic calderas in California: 1974-1995","interactions":[],"lastModifiedDate":"2013-01-22T15:36:53","indexId":"70020656","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3071,"text":"Physics of the Earth and Planetary Interiors","active":true,"publicationSubtype":{"id":10}},"title":"Review of magnetic field monitoring near active faults and volcanic calderas in California: 1974-1995","docAbstract":"Differential magnetic fields have been monitored along the San Andreas fault and the Long Valley caldera since 1974. At each monitoring location, proton precession magnetometers sample total magnetic field intensity at a resolution of 0.1 nT or 0.25 nT. Every 10 min, data samples are transmitted via satellite telemetry to Menlo Park, CA for processing and analysis. The number of active magnetometer sites has varied during the past 21 years from 6 to 25, with 12 sites currently operational. We use this network to identify magnetic field changes generated by earthquake and volcanic processes. During the two decades of monitoring, five moderate earthquakes (M5.9 to M7.3) have occurred within 20 km of magnetometer sites located along the San Andreas fault and only one preseismic signal of 1.5 nT has been observed. During moderate earthquakes, coseismic magnetic signals, with amplitudes from 0.7 nT to 1.3 nT, have been identified for 3 of the 5 events. These observations are generally consistent with those calculated from simple seismomagnetic models of these earthquakes and near-fault coseismic magnetic field disturbances rarely exceed one nanotesla. These data are consistent with the concept of low shear stress and relatively uniform displacement of the San Andreas fault system as expected due to high pore fluid pressure on the fault. A systematic decrease of 0.8-1 nT/year in magnetic field has occurred in the Long Valley caldera since 1989. These magnetic field data are similar in form to observed geodetically measured displacements from inflation of the resurgent dome. A simple volcanomagnetic model involving pressure increase of 50 MPa/a at a depth of 7 km under the resurgent dome can replicate these magnetic field observations. This model is derived from the intrusion model that best fits the surface deformation data. ?? 1998 Elsevier Science B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Physics of the Earth and Planetary Interiors","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/S0031-9201(97)00086-1","issn":"00319201","usgsCitation":"Mueller, R., and Johnston, M., 1998, Review of magnetic field monitoring near active faults and volcanic calderas in California: 1974-1995: Physics of the Earth and Planetary Interiors, v. 105, no. 3-4, p. 131-144, https://doi.org/10.1016/S0031-9201(97)00086-1.","startPage":"131","endPage":"144","numberOfPages":"14","costCenters":[],"links":[{"id":231232,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266260,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0031-9201(97)00086-1"}],"volume":"105","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aac76e4b0c8380cd86d46","contributors":{"authors":[{"text":"Mueller, R.J.","contributorId":77135,"corporation":false,"usgs":true,"family":"Mueller","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":387028,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnston, M.J.S. 0000-0003-4326-8368","orcid":"https://orcid.org/0000-0003-4326-8368","contributorId":104889,"corporation":false,"usgs":true,"family":"Johnston","given":"M.J.S.","affiliations":[],"preferred":false,"id":387029,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020655,"text":"70020655 - 1998 - Determination of Δσ and κ0 from response spectra of large earthquakes in Greece","interactions":[],"lastModifiedDate":"2023-10-19T00:00:30.501457","indexId":"70020655","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Determination of Δσ and κ0 from response spectra of large earthquakes in Greece","docAbstract":"<div id=\"130405662\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>We fit an<span>&nbsp;</span><i>ω</i><sup>−2</sup><span>&nbsp;</span>model to response spectra from eight recent Greek earthquakes ranging in size from<span>&nbsp;</span><strong>M</strong><span>&nbsp;</span>= 5.8 to<span>&nbsp;</span><strong>M</strong><span>&nbsp;</span>= 6.9. The diminution parameter<span>&nbsp;</span><i>κ</i><sub>0</sub><span>&nbsp;</span>was determined for each site, with a value near 0.06 for a typical soil site. The stress parameter (Δσ) showed little variation from earthquake to earthquake and had a mean value of 56 bars over all earthquakes. Predictions of peak velocity, peak acceleration, rupture duration, and fault length using the derived stress parameters are consistent with observations. Frequency-dependent site amplifications were included in all estimates; the combined effect of amplification and attenuation had a maximum value close to a factor of 2.5 for a typical soil site, relative to the motions at the surface of a perfectly elastic uniform half-space composed of materials near the source. The results form the foundation for predictions of strong motions in Greece for distances and magnitudes other than those for which data are available.</p></div>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0880010170","issn":"00371106","usgsCitation":"Margaris, B., and Boore, D., 1998, Determination of Δσ and κ0 from response spectra of large earthquakes in Greece: Bulletin of the Seismological Society of America, v. 88, no. 1, p. 170-182, https://doi.org/10.1785/BSSA0880010170.","productDescription":"13 p.","startPage":"170","endPage":"182","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":231193,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Greece","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[23.69998,35.705],[24.24667,35.36802],[25.02502,35.425],[25.76921,35.35402],[25.74502,35.18],[26.29,35.29999],[26.165,35.005],[24.72498,34.91999],[24.73501,35.08499],[23.51498,35.27999],[23.69998,35.705]]],[[[26.6042,41.56211],[26.2946,40.93626],[26.05694,40.82412],[25.44768,40.85255],[24.92585,40.94706],[23.71481,40.68713],[24.408,40.12499],[23.89997,39.96201],[23.343,39.961],[22.81399,40.47601],[22.6263,40.25656],[22.84975,39.65931],[23.35003,39.19001],[22.9731,38.9709],[23.53002,38.51],[24.02502,38.21999],[24.04001,37.65501],[23.115,37.92001],[23.40997,37.40999],[22.77497,37.30501],[23.15423,36.42251],[22.49003,36.41],[21.67003,36.84499],[21.29501,37.64499],[21.12003,38.31032],[20.73003,38.76999],[20.21771,39.34023],[20.15002,39.625],[20.615,40.11001],[20.675,40.435],[20.99999,40.58],[21.02004,40.84273],[21.67416,40.93127],[22.05538,41.14987],[22.59731,41.13049],[22.76177,41.3048],[22.95238,41.33799],[23.69207,41.30908],[24.49264,41.5839],[25.1972,41.23449],[26.10614,41.3289],[26.11704,41.8269],[26.6042,41.56211]]]]},\"properties\":{\"name\":\"Greece\"}}]}","volume":"88","issue":"1","noUsgsAuthors":false,"publicationDate":"1998-02-01","publicationStatus":"PW","scienceBaseUri":"5059ff86e4b0c8380cd4f238","contributors":{"authors":[{"text":"Margaris, B.N.","contributorId":16610,"corporation":false,"usgs":true,"family":"Margaris","given":"B.N.","affiliations":[],"preferred":false,"id":387026,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boore, D.M. 0000-0002-8605-9673","orcid":"https://orcid.org/0000-0002-8605-9673","contributorId":64226,"corporation":false,"usgs":true,"family":"Boore","given":"D.M.","affiliations":[],"preferred":false,"id":387027,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021080,"text":"70021080 - 1998 - High-resolution Monte Carlo simulation of flow and conservative transport in heterogeneous porous media: 2. Transport results","interactions":[],"lastModifiedDate":"2018-03-16T09:52:49","indexId":"70021080","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"High-resolution Monte Carlo simulation of flow and conservative transport in heterogeneous porous media: 2. Transport results","docAbstract":"<p><span>In this, the second of two papers concerned with the use of numerical simulation to examine flow and transport parameters in heterogeneous porous media via Monte Carlo methods, results from the transport aspect of these simulations are reported on. Transport simulations contained herein assume a finite pulse input of conservative tracer, and the numerical technique endeavors to realistically simulate tracer spreading as the cloud moves through a heterogeneous medium. Medium heterogeneity is limited to the hydraulic conductivity field, and generation of this field assumes that the hydraulic-conductivity process is second-order stationary. Methods of estimating cloud moments, and the interpretation of these moments, are discussed. Techniques for estimation of large-time macrodispersivities from cloud second-moment data, and for the approximation of the standard errors associated with these macrodispersivities, are also presented. These moment and macrodispersivity estimation techniques were applied to tracer clouds resulting from transport scenarios generated by specific Monte Carlo simulations. Where feasible, moments and macrodispersivities resulting from the Monte Carlo simulations are compared with first- and second-order perturbation analyses. Some limited results concerning the possible ergodic nature of these simulations, and the presence of non-Gaussian behavior of the mean cloud, are reported on as well.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/97WR02711","usgsCitation":"Naff, R., Haley, D., and Sudicky, E., 1998, High-resolution Monte Carlo simulation of flow and conservative transport in heterogeneous porous media: 2. Transport results: Water Resources Research, v. 34, no. 4, p. 679-697, https://doi.org/10.1029/97WR02711.","productDescription":"19 p.","startPage":"679","endPage":"697","costCenters":[],"links":[{"id":229695,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30fae4b0c8380cd5db16","contributors":{"authors":[{"text":"Naff, R.L.","contributorId":86349,"corporation":false,"usgs":true,"family":"Naff","given":"R.L.","affiliations":[],"preferred":false,"id":388586,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haley, D.F.","contributorId":68480,"corporation":false,"usgs":true,"family":"Haley","given":"D.F.","email":"","affiliations":[],"preferred":false,"id":388585,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sudicky, E.A.","contributorId":67237,"corporation":false,"usgs":true,"family":"Sudicky","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":388584,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70021079,"text":"70021079 - 1998 - High-resolution Monte Carlo simulation of flow and conservative transport in heterogeneous porous media: 1. Methodology and flow results","interactions":[],"lastModifiedDate":"2018-03-16T09:54:19","indexId":"70021079","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"High-resolution Monte Carlo simulation of flow and conservative transport in heterogeneous porous media: 1. Methodology and flow results","docAbstract":"<p><span>In this, the first of two papers concerned with the use of numerical simulation to examine flow and transport parameters in heterogeneous porous media via Monte Carlo methods, various aspects of the modelling effort are examined. In particular, the need to save on core memory causes one to use only specific realizations that have certain initial characteristics; in effect, these transport simulations are conditioned by these characteristics. Also, the need to independently estimate length scales for the generated fields is discussed. The statistical uniformity of the flow field is investigated by plotting the variance of the seepage velocity for vector components in the&nbsp;</span><i>x</i><span>,<span>&nbsp;</span></span><i>y</i><span>, and<span>&nbsp;</span></span><i>z</i><span><span>&nbsp;</span>directions. Finally, specific features of the velocity field itself are illuminated in this first paper. In particular, these data give one the opportunity to investigate the effective hydraulic conductivity in a flow field which is approximately statistically uniform; comparisons are made with first- and second-order perturbation analyses. The mean cloud velocity is examined to ascertain whether it is identical to the mean seepage velocity of the model. Finally, the variance in the cloud centroid velocity is examined for the effect of source size and differing strengths of local transverse dispersion.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/97WR02712","usgsCitation":"Naff, R., Haley, D., and Sudicky, E., 1998, High-resolution Monte Carlo simulation of flow and conservative transport in heterogeneous porous media: 1. Methodology and flow results: Water Resources Research, v. 34, no. 4, p. 663-677, https://doi.org/10.1029/97WR02712.","productDescription":"15 p.","startPage":"663","endPage":"677","costCenters":[],"links":[{"id":229694,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3110e4b0c8380cd5dbd1","contributors":{"authors":[{"text":"Naff, R.L.","contributorId":86349,"corporation":false,"usgs":true,"family":"Naff","given":"R.L.","affiliations":[],"preferred":false,"id":388583,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haley, D.F.","contributorId":68480,"corporation":false,"usgs":true,"family":"Haley","given":"D.F.","email":"","affiliations":[],"preferred":false,"id":388582,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sudicky, E.A.","contributorId":67237,"corporation":false,"usgs":true,"family":"Sudicky","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":388581,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020735,"text":"70020735 - 1998 - Small-scale morphology across the surf zone","interactions":[],"lastModifiedDate":"2012-03-12T17:20:19","indexId":"70020735","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Small-scale morphology across the surf zone","docAbstract":"Small-scale (< 5 m horizontal length) nearshore morphologic height variations were measured by combining CRAB surveys with bed elevations acquired with a 1 MHz sonic altimeter mounted on the CRAB during the October Phase of the DUCK94 experiment. Bedform plan views were recorded simultaneously using a 500 kHz side-scan sonar mounted on the CRAB. Waves and currents were measured at the same time. Significant temporal and spatial variations in the small-scale morphology were measured in response to changing waves and currents during the 2 weeks examined. Three cases are examined in detail: (1) mild waves and weak longshore currents resulting in wave ripples throughout the study area; (2) storm waves with strong longshore currents resulting in lunate and straight-crested mega-ripples in the trough of the barred beach; and (3) narrow-band, normally incident waves with a strong rip current resulting in a planar bed except in the throat of the rip where mega-ripples were measured. Wavenumber spectra of the bed were generally broad, indicating newly formed ripples coexisted with residual ripples from the past to form complex, multi-scaled ripple patterns.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0025-3227(97)00114-X","issn":"00253227","usgsCitation":"Thornton, E., Swayne, J., and Dingler, J., 1998, Small-scale morphology across the surf zone: Marine Geology, v. 145, no. 3-4, p. 173-196, https://doi.org/10.1016/S0025-3227(97)00114-X.","startPage":"173","endPage":"196","numberOfPages":"24","costCenters":[],"links":[{"id":206930,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0025-3227(97)00114-X"},{"id":231279,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"145","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9198e4b08c986b3199b5","contributors":{"authors":[{"text":"Thornton, E.B.","contributorId":103828,"corporation":false,"usgs":true,"family":"Thornton","given":"E.B.","affiliations":[],"preferred":false,"id":387317,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Swayne, J.L.","contributorId":7449,"corporation":false,"usgs":true,"family":"Swayne","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":387315,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dingler, J.R.","contributorId":64247,"corporation":false,"usgs":true,"family":"Dingler","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":387316,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020654,"text":"70020654 - 1998 - A borehole-to-surface electromagnetic survey","interactions":[],"lastModifiedDate":"2024-04-17T16:20:15.305092","indexId":"70020654","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"A borehole-to-surface electromagnetic survey","docAbstract":"The results of a limited field trial confirm the usefulness of borehole-to-surface electromagnetic (EM) measurements for monitoring fluid extraction. A vertical EM profiling experiment was done at the University of California Richmond Field Station, where we simulated a brine spill plume by creating a saline water injection zone at a depth of 30 m. The data acquisition mode was analogous to the reverse vertical seismic profiling (VSP) configuration used for seismic measurements in that the EM transmitter traversed the PVC-cased borehole used for fluid injection and extraction while the receivers were deployed on the surface. The EM measurements were made at 9.6 kHz with an accuracy of 1% in signal amplitude and 1??in signal phase. Observations were taken at 5-m intervals along two intersecting profiles that were centered on the injection well and extended for 60 m on either side of it. The presence of the injected salt water, at the expected 30 m depth, was indicated clearly by differences between the pre-extraction and postextraction data. A limited amount of numerical modeling showed that the experimental data were consistent with the presence of two superposed saline plumes. The uppermost of these, located at 26 m depth, was 2 m thick and had an area of 30 m2. The lower plume, located at 30 m, is the major cause of the observed anomally, as it has an areal extent of 120 m2 and a thickness of 3 m. Surprisingly, the measurements were very sensitive to the presence of cultural surficial conductivity anomalies. These spurious effect were reduced by spatial filtering of the data prior to interpretation.The results of a limited field trial confirm the usefulness of borehole-to-surface electromagnetic (EM) measurements for monitoring fluid extraction. A brine spill plume is simulated by creating a saline water injection zone at a depth of 30 m. The data acquisition mode was analogous to the reverse vertical seismic profiling (VSP) configuration used for seismic measurements in that the EM transmitter traversed the polyvinyl chloride-cased borehole used for fluid injection and extraction while the receivers were deployed on the surface. Observations were taken at 5-m intervals along two intersecting profiles that were centered on the injection well and extended for 60 m on either side of it.","language":"English","publisher":"Society of Exploration Geophysicists","publisherLocation":"Tulsa, OK, United States","doi":"10.1190/1.1444453","issn":"00168033","usgsCitation":"Tseng, H., Becker, A., Wilt, M., and Deszcz-Pan, M., 1998, A borehole-to-surface electromagnetic survey: Geophysics, v. 63, no. 5, p. 1565-1572, https://doi.org/10.1190/1.1444453.","productDescription":"8 p.","startPage":"1565","endPage":"1572","numberOfPages":"8","costCenters":[],"links":[{"id":231192,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"63","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e32ce4b0c8380cd45e66","contributors":{"authors":[{"text":"Tseng, H.-W.","contributorId":76089,"corporation":false,"usgs":true,"family":"Tseng","given":"H.-W.","email":"","affiliations":[],"preferred":false,"id":387023,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Becker, A.","contributorId":95229,"corporation":false,"usgs":true,"family":"Becker","given":"A.","email":"","affiliations":[],"preferred":false,"id":387024,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilt, M.J.","contributorId":30781,"corporation":false,"usgs":true,"family":"Wilt","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":387022,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Deszcz-Pan, M.","contributorId":102422,"corporation":false,"usgs":true,"family":"Deszcz-Pan","given":"M.","email":"","affiliations":[],"preferred":false,"id":387025,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70021077,"text":"70021077 - 1998 - Depth and substrate as determinants of distribution of juvenile flathead sole (Hippoglossoides elassodon) and rock sole (Pleuronectes bilineatus), in Kachemak Bay, Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:19:39","indexId":"70021077","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2449,"text":"Journal of Sea Research","active":true,"publicationSubtype":{"id":10}},"title":"Depth and substrate as determinants of distribution of juvenile flathead sole (Hippoglossoides elassodon) and rock sole (Pleuronectes bilineatus), in Kachemak Bay, Alaska","docAbstract":"Three transects in Kachemak Bay, Alaska, were sampled in September 1994, May and August 1995, and February, May, and August 1996. Juvenile flathead sole, Hippoglossoides elassodon, and rock sole, Pleuronectes bilineatus, were the most abundant flatfishes, comprising 65-85% of all fiatfishes captured at any period. Collections of fish and sediments were made at regular depth contour intervals of l0 m. Habitat distribution was described by depth at 10 m increments and sediment percent weights of gravel, sand, and mud. Year-round habitat of flathead sole age-0 was primarily from 40 to 60 m, and age-1 habitat was primarily from 40 to 80 m. Summer habitat of rock sole age-0 and -1 was from 10 to 30 m, and in winter they moved offshore to depths of up to 150 m. Both age classes of flathead sole were most abundant on mixed mud sediments, while age-1 were also in high abundance on muddy sand sediments. Rock sole age-0 and -1 were most abundant on sand, though age-1 were also found on a variety of sediments both finer and coarser grained than sand. Flathead sole and rock sole had distinctive depth and sediment habitats. When habitat overlap occurred between the species, it was most often due to rock sole moving offshore in the winter. Abundances were not significantly different among seasons for age-1 flatfishes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Sea Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S1385-1101(97)00058-0","issn":"13851101","usgsCitation":"Abookire, A.A., and Norcross, B.L., 1998, Depth and substrate as determinants of distribution of juvenile flathead sole (Hippoglossoides elassodon) and rock sole (Pleuronectes bilineatus), in Kachemak Bay, Alaska: Journal of Sea Research, v. 39, no. 1-2, p. 113-123, https://doi.org/10.1016/S1385-1101(97)00058-0.","startPage":"113","endPage":"123","numberOfPages":"11","costCenters":[],"links":[{"id":206407,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S1385-1101(97)00058-0"},{"id":229656,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fecde4b0c8380cd4ef2f","contributors":{"authors":[{"text":"Abookire, Alisa A.","contributorId":107224,"corporation":false,"usgs":true,"family":"Abookire","given":"Alisa","email":"","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":false,"id":388575,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Norcross, Brenda L.","contributorId":21497,"corporation":false,"usgs":false,"family":"Norcross","given":"Brenda","email":"","middleInitial":"L.","affiliations":[{"id":7211,"text":"University of Alaska, Fairbanks","active":true,"usgs":false}],"preferred":false,"id":388574,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020653,"text":"70020653 - 1998 - Origin of a classic cratonic sheet sandstone: Stratigraphy across the Sauk II-Sauk III boundary in the Upper Mississippi Valley","interactions":[],"lastModifiedDate":"2023-12-20T23:49:46.793903","indexId":"70020653","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Origin of a classic cratonic sheet sandstone: Stratigraphy across the Sauk II-Sauk III boundary in the Upper Mississippi Valley","docAbstract":"<p>The origin of cratonic sheet sandstones of Proterozoic and early Paleozoic age has been a long-standing problem for sedimentologists. Lower Paleozoic strata in the Upper Mississippi Valley are best known for several such sandstone bodies, the regional depositional histories of which are poorly understood. We have combined outcrop and subsurface data from six states to place the Upper Cambrian Wonewoc (Ironton and Galesville) Sandstone in a well-constrained stratigraphic framework across thousands of square kilometers. This framework makes it possible for the first time to construct a regional-scale depositional model that explains the origin of this and other cratonic sheet sandstones.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1998)110<0188:OOACCS>2.3.CO;2","issn":"00167606","usgsCitation":"Runkel, A.C., McKay, R., and Palmer, A.R., 1998, Origin of a classic cratonic sheet sandstone: Stratigraphy across the Sauk II-Sauk III boundary in the Upper Mississippi Valley: Geological Society of America Bulletin, v. 110, no. 2, p. 188-210, https://doi.org/10.1130/0016-7606(1998)110<0188:OOACCS>2.3.CO;2.","productDescription":"23 p.","startPage":"188","endPage":"210","numberOfPages":"23","costCenters":[],"links":[{"id":231151,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -98.24927107442258,\n              50.84930949962455\n            ],\n            [\n              -98.24927107442258,\n              36.74108819977258\n            ],\n            [\n              -85.2414585744225,\n              36.74108819977258\n            ],\n            [\n              -85.2414585744225,\n              50.84930949962455\n            ],\n            [\n              -98.24927107442258,\n              50.84930949962455\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"110","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a70c4e4b0c8380cd76225","contributors":{"authors":[{"text":"Runkel, Anthony C.","contributorId":63186,"corporation":false,"usgs":true,"family":"Runkel","given":"Anthony","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":387020,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKay, R.M.","contributorId":91238,"corporation":false,"usgs":true,"family":"McKay","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":387021,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Palmer, A. R.","contributorId":41819,"corporation":false,"usgs":true,"family":"Palmer","given":"A.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":387019,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020650,"text":"70020650 - 1998 - The hyporheic zone as a source of dissolved organic carbon and carbon gases to a temperate forested stream","interactions":[],"lastModifiedDate":"2019-02-01T06:41:34","indexId":"70020650","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1007,"text":"Biogeochemistry","active":true,"publicationSubtype":{"id":10}},"title":"The hyporheic zone as a source of dissolved organic carbon and carbon gases to a temperate forested stream","docAbstract":"The objective of this study was to examine chemical changes in porewaters that occur over small scales (cm) as groundwater flows through the hyporheic zone and discharges to a stream in a temperate forest of northern Wisconsin. Hyporheic-zone porewaters were sampled at discrete depths of 2, 10, 15, 61, and 183 cm at three study sites in the study basin. Chemical profiles of dissolved organic carbon (DOC), CO2, CH4, and pH show dramatic changes between 61 cm sediment depth and the water-sediment interface. Unless discrete samples at small depth intervals are taken, these chemical profiles are not accounted for. Similar trends were observed at the three study locations, despite each site having very different hydraulic-flow regimes. Increases in DOC concentration by an order of magnitude from 61 to 15 cm depth with a corresponding decrease in pH and rapid decreases in the molecular weight of the DOC suggest that aliphatic compounds (likely organic acids) are being generated in the hyporheic zone. Estimated efflux rates of DOC, CO2, and CH4 to the stream are 6.2, 0.79, 0.13 moles m2 d-1, respectively, with the vast majority of these materials produced in the hyporheic zone. Very little of these materials are accounted for by sampling stream water, suggesting rapid uptake and/or volatilization.","language":"English","publisher":"Springer","doi":"10.1023/A:1006005311257","issn":"01682563","usgsCitation":"Schindler, J., and Krabbenhoft, D., 1998, The hyporheic zone as a source of dissolved organic carbon and carbon gases to a temperate forested stream: Biogeochemistry, v. 43, no. 2, p. 157-174, https://doi.org/10.1023/A:1006005311257.","productDescription":"18 p.","startPage":"157","endPage":"174","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":231075,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206876,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1006005311257"}],"volume":"43","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bacd3e4b08c986b323781","contributors":{"authors":[{"text":"Schindler, J.E.","contributorId":14598,"corporation":false,"usgs":true,"family":"Schindler","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":387009,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Krabbenhoft, D. P. 0000-0003-1964-5020","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":90765,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"D. P.","affiliations":[],"preferred":false,"id":387010,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020648,"text":"70020648 - 1998 - Relationships between land uses and rainwater quality in a southcentral Pennsylvania watershed","interactions":[],"lastModifiedDate":"2024-05-29T00:10:15.826667","indexId":"70020648","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Relationships between land uses and rainwater quality in a southcentral Pennsylvania watershed","docAbstract":"<p><strong>ABSTRACT:<span>&nbsp;</span></strong>Spatial and temporal variability in rainfall concentrations of nutrients, major ions, and herbicides was monitored at 7 locations in or near the Conodoguinet Creek watershed in south-central Pennsylvania from 1991.1993. Results were used to (1) compare precipitation quality in forested, agricultural and urban areas, and (2) assess the practicality of using volunteer citizen monitoring in such a study.</p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.1998.tb05957.x","issn":"1093474X","usgsCitation":"Shertzer, R., Hall, D.W., Steffy, S., and Kime, R., 1998, Relationships between land uses and rainwater quality in a southcentral Pennsylvania watershed: Journal of the American Water Resources Association, v. 34, no. 1, p. 13-26, https://doi.org/10.1111/j.1752-1688.1998.tb05957.x.","productDescription":"14 p.","startPage":"13","endPage":"26","numberOfPages":"14","costCenters":[],"links":[{"id":231073,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"50e4a7a6e4b0e8fec6cdc528","contributors":{"authors":[{"text":"Shertzer, R.H.","contributorId":41178,"corporation":false,"usgs":true,"family":"Shertzer","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":386995,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hall, D. W.","contributorId":106528,"corporation":false,"usgs":true,"family":"Hall","given":"D.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":386998,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Steffy, S.A.","contributorId":62368,"corporation":false,"usgs":true,"family":"Steffy","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":386996,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kime, R.A.","contributorId":98908,"corporation":false,"usgs":true,"family":"Kime","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":386997,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70020647,"text":"70020647 - 1998 - Seasonal uranium distributions in the coastal waters off the Amazon and Mississippi Rivers","interactions":[],"lastModifiedDate":"2023-10-12T18:57:42.441687","indexId":"70020647","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1583,"text":"Estuaries","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal uranium distributions in the coastal waters off the Amazon and Mississippi Rivers","docAbstract":"<p><span>The chemical reactivity of uranium was investigated across estuarine gradients from two of the world’s largest river systems: the Amazon and Mississippi. Concentrations of dissolved (&lt;0.45 μm) uranium (U) were measured in surface waters of the Amazon shelf during rising (March 1990), flood (June 1990) and low (November 1991) discharge regimes. The dissolved U content was also examined in surface waters collected across estuarine gradients of the Mississippi outflow region during April 1992, August 1993, and November (1993). All water samples were analyzed for U by isotope dilution inductively coupled plasma mass spectrometry (ICP-MS). In Amazon shelf surface waters uranium increased nonconservatively from about 0.01 μg I</span><sup>−1</sup><span>&nbsp;at the river’s mouth to over 3 μg I</span><sup>−1</sup><span>&nbsp;at the distal site, irrespective of river discharge stage. Observed large-scale U removal at salinities generally less than 15 implies a) that riverine dissolved U was extensively adsorbed by freshly-precipitated hydrous metal oxides (e.g., FeOOH, MnO</span><sub>2</sub><span>) as a result of flocculation and aggregation, and b) that energetic resuspension and reworking of shelf sediments and fluid muds on the Amazon shelf released a chemically reactive particle/colloid to the water column which can further scavenge dissolved U across much of the estuarine gradient. In contrast, the estuarine chemistry of U is inconclusive within surface waters of the Mississippi shelf-break region. U behavior is most likely controlled less by traditional sorption and/or desorption reactions involving metal oxides or colloids than by the river’s variable discharge regime (e.g., water parcel residence time during estuarine mixing, nature of particulates, sediment storage and resuspension in, the confined lower river), and plume dispersal. Mixing of the thin freshwater lens into ambient seawater is largely defined by wind-driven rather than physical processes. As a consequence, in the Mississippi outflow region uranium predominantly displays conservative behavior; removal is evident only during anomalous river discharge regimes. ‘Products-approach’ mixing experiments conducted during the Flood of 1993 suggest the importance of small particles and/or colloids in defining a depleted U versus salinity distribution.</span></p>","language":"English","publisher":"Springer","doi":"10.2307/1352837","issn":"01608347","usgsCitation":"Swarzenski, P., and McKee, B., 1998, Seasonal uranium distributions in the coastal waters off the Amazon and Mississippi Rivers: Estuaries, v. 21, no. 3, p. 379-390, https://doi.org/10.2307/1352837.","productDescription":"12 p.","startPage":"379","endPage":"390","costCenters":[],"links":[{"id":231035,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Brazil, United States","state":"Louisiana","otherGeospatial":"Amazon River, Atlantic Ocean, Gulf of Mexico, Mississippi River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -51.787200518033245,\n              -0.7448797050978158\n            ],\n            [\n              -51.325901042624395,\n              -1.4956834218673976\n            ],\n            [\n              -50.97188051498486,\n              -1.7852175589136436\n            ],\n            [\n              -50.51058103957601,\n              -2.074706101017057\n            ],\n            [\n              -50.006369985059536,\n              -1.946050628430001\n            ],\n            [\n              -49.77035629996669,\n              -2.010379632309963\n            ],\n            [\n              -49.480703140988936,\n              -1.881719170371852\n            ],\n            [\n              -49.06231524468768,\n              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0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":386993,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKee, B.A.","contributorId":90897,"corporation":false,"usgs":true,"family":"McKee","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":386994,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020646,"text":"70020646 - 1998 - Assessing sediment toxicity from navigational pools of the Upper Mississippi River using a 28-day <i>Hyalella azteca</i> test","interactions":[],"lastModifiedDate":"2016-10-13T11:31:15","indexId":"70020646","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Assessing sediment toxicity from navigational pools of the Upper Mississippi River using a 28-day <i>Hyalella azteca</i> test","docAbstract":"<p><span>To assess the extent of sediment contamination in the Upper Mississippi River (UMR) system after the flood of 1993, sediment samples were collected from 24 of the 26 navigational pools in the river and from one site in the Saint Croix River in the summer of 1994. Whole-sediment tests were conducted with the amphipod </span><i class=\"EmphasisTypeItalic \">Hyalella azteca</i><span> for 28 days measuring the effects on survival, growth, and sexual maturation. Amphipod survival was significantly reduced in only one sediment (13B) relative to the control and reference sediments. Body length of amphipods was significantly reduced relative to the control and reference sediments in only one sample (26C). Sexual maturation was not significantly reduced in any treatment when compared to the control and reference sediments. No significant correlations were observed between survival, growth, and maturation to either the physical or chemical characteristics of the sediment samples from the river. When highly reliable effect range medians (ERMs) were used to evaluate sediment chemistry, 47 of 49 (96%) of the samples were correctly classified as nontoxic. These results indicate that sediment samples from the Upper Mississippi River are relatively uncontaminated compared to other areas of known contamination in the United States.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s002449900366","issn":"00904341","usgsCitation":"Kemble, N., Brunson, E., Canfield, T., Dwyer, F., and Ingersoll, C., 1998, Assessing sediment toxicity from navigational pools of the Upper Mississippi River using a 28-day <i>Hyalella azteca</i> test: Archives of Environmental Contamination and Toxicology, v. 35, no. 2, p. 181-190, https://doi.org/10.1007/s002449900366.","productDescription":"10 p.","startPage":"181","endPage":"190","numberOfPages":"10","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":479834,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.5782","text":"External Repository"},{"id":231034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206870,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s002449900366"}],"volume":"35","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ede0e4b0c8380cd49a85","contributors":{"authors":[{"text":"Kemble, N.E.","contributorId":28028,"corporation":false,"usgs":true,"family":"Kemble","given":"N.E.","affiliations":[],"preferred":false,"id":386989,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brunson, E.L.","contributorId":29924,"corporation":false,"usgs":true,"family":"Brunson","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":386990,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Canfield, T.J.","contributorId":9026,"corporation":false,"usgs":true,"family":"Canfield","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":386988,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dwyer, F.J.","contributorId":107818,"corporation":false,"usgs":true,"family":"Dwyer","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":386992,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ingersoll, C.G. 0000-0003-4531-5949","orcid":"https://orcid.org/0000-0003-4531-5949","contributorId":56338,"corporation":false,"usgs":true,"family":"Ingersoll","given":"C.G.","affiliations":[],"preferred":false,"id":386991,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70020645,"text":"70020645 - 1998 - Solution of the advection-dispersion equation in two dimensions by a finite-volume Eulerian-Lagrangian localized adjoint method","interactions":[],"lastModifiedDate":"2020-01-06T06:37:03","indexId":"70020645","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":664,"text":"Advances in Water Resources","active":true,"publicationSubtype":{"id":10}},"title":"Solution of the advection-dispersion equation in two dimensions by a finite-volume Eulerian-Lagrangian localized adjoint method","docAbstract":"<p>We extend the finite-volume Eulerian-Lagrangian localized adjoint method (FVELLAM) for solution of the advection-dispersion equation to two dimensions. The method can conserve mass globally and is not limited by restrictions on the size of the grid Peclet or Courant number. Therefore, it is well suited for solution of advection-dominated ground-water solute transport problems. In test problem comparisons with standard finite differences, FVELLAM is able to attain accurate solutions on much coarser space and time grids. On fine grids, the accuracy of the two methods is comparable. A critical aspect of FVELLAM (and all other ELLAMs) is evaluation of the mass storage integral from the preceding time level. In FVELLAM this may be accomplished with either a forward or backtracking approach. The forward tracking approach conserves mass globally and is the preferred approach. The backtracking approach is less computationally intensive, but not globally mass conservative. Boundary terms are systematically represented as integrals in space and time which are evaluated by a common integration scheme in conjunction with forward tracking through time. Unlike the one-dimensional case, local mass conservation cannot be guaranteed, so slight oscillations in concentration can develop, particularly in the vicinity of inflow or outflow boundaries.&nbsp;</p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0309-1708(96)00033-4","issn":"03091708","usgsCitation":"Healy, R.W., and Russell, T., 1998, Solution of the advection-dispersion equation in two dimensions by a finite-volume Eulerian-Lagrangian localized adjoint method: Advances in Water Resources, v. 21, no. 1, p. 11-26, https://doi.org/10.1016/S0309-1708(96)00033-4.","productDescription":"16 p.","startPage":"11","endPage":"26","numberOfPages":"16","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230995,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9258e4b08c986b319e6b","contributors":{"authors":[{"text":"Healy, Richard W. 0000-0002-0224-1858 rwhealy@usgs.gov","orcid":"https://orcid.org/0000-0002-0224-1858","contributorId":658,"corporation":false,"usgs":true,"family":"Healy","given":"Richard","email":"rwhealy@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":778906,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Russell, T.F.","contributorId":86811,"corporation":false,"usgs":true,"family":"Russell","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":386986,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021069,"text":"70021069 - 1998 - Mourning Dove nesting habitat and nest success in Central Missouri","interactions":[],"lastModifiedDate":"2012-03-12T17:19:47","indexId":"70021069","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2284,"text":"Journal of Field Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"Mourning Dove nesting habitat and nest success in Central Missouri","docAbstract":"Previous Mourning Dove (Zenaida macroura) nesting studies conducted in areas containing a mixture of edge and continuous habitats have focused on edge habitats. Consequently, little is known about the potential contribution of continuous habitats to dove production. In this study we evaluated the relative importance of these two extensive habitat types by monitoring the habitat use and nest success of 59 radio-marked doves during 1990-1991 in central Missouri. Of 83 nests initiated by our marked sample, most (81.9%) were located in edge habitats. Although continuous habitats were selected less as nest sites, the proportion of successful nests did not differ significantly from that in edge habitats. Our data indicate that continuous habitats should not be considered marginal nesting habitat. If the intensity of use and nest success that we observed are representative regionally or nationally, continuous habitats could contribute substantially to annual Mourning Dove production because of the high availability of these habitats throughout much of the Mourning Dove breeding range.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Field Ornithology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"02738570","usgsCitation":"Drobney, R., Schulz, J., Sheriff, S., and Fuemmeler, W., 1998, Mourning Dove nesting habitat and nest success in Central Missouri: Journal of Field Ornithology, v. 69, no. 2, p. 299-305.","startPage":"299","endPage":"305","numberOfPages":"7","costCenters":[],"links":[{"id":230169,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"69","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5ec0e4b0c8380cd70c56","contributors":{"authors":[{"text":"Drobney, R.D.","contributorId":26827,"corporation":false,"usgs":true,"family":"Drobney","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":388550,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schulz, J.H.","contributorId":67856,"corporation":false,"usgs":true,"family":"Schulz","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":388552,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sheriff, S.L.","contributorId":93155,"corporation":false,"usgs":true,"family":"Sheriff","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":388553,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fuemmeler, W.J.","contributorId":41701,"corporation":false,"usgs":true,"family":"Fuemmeler","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":388551,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70020637,"text":"70020637 - 1998 - Microsatellites identify depredated waterfowl remains from glaucous gull stomachs","interactions":[],"lastModifiedDate":"2012-03-12T17:20:16","indexId":"70020637","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2774,"text":"Molecular Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Microsatellites identify depredated waterfowl remains from glaucous gull stomachs","docAbstract":"Prey remains can provide valuable sources of information regarding causes of predation and the species composition of a predator's diet. Unfortunately, the highly degraded state of many prey samples from gastrointestinal tracts often precludes unambiguous identification. We describe a procedure by which PCR amplification of taxonomically informative microsatellite loci were used to identify species of waterfowl predated by glaucous gulls (Larus hyperboreus). We found that one microsatellite locus unambiguously distinguished between species of the subfamily Anserinae (whistling ducks, geese and swans) and those of the subfamily Anatidae (all other ducks). An additional locus distinguished the remains of all geese and swan species known to nest on the Yukon-Kuskokwim delta in western Alaska. The study focused on two waterfowl species which have experienced precipitous declines in population numbers: emperor geese (Chen canagica) and spectacled eiders (Somateria fischeri). No evidence of predation on spectacled eiders was observed. Twenty-six percent of all glaucous gull stomachs examined contained the remains of juvenile emperor geese.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Molecular Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1046/j.1365-294x.1998.00434.x","issn":"09621083","usgsCitation":"Scribner, K., and Bowman, T.D., 1998, Microsatellites identify depredated waterfowl remains from glaucous gull stomachs: Molecular Ecology, v. 7, no. 10, p. 1401-1405, https://doi.org/10.1046/j.1365-294x.1998.00434.x.","startPage":"1401","endPage":"1405","numberOfPages":"5","costCenters":[],"links":[{"id":206978,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1046/j.1365-294x.1998.00434.x"},{"id":231460,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"10","noUsgsAuthors":false,"publicationDate":"2002-02-28","publicationStatus":"PW","scienceBaseUri":"505a56a3e4b0c8380cd6d70d","contributors":{"authors":[{"text":"Scribner, K.T.","contributorId":97033,"corporation":false,"usgs":true,"family":"Scribner","given":"K.T.","email":"","affiliations":[],"preferred":false,"id":386965,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bowman, Timothy D.","contributorId":80779,"corporation":false,"usgs":false,"family":"Bowman","given":"Timothy","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":386964,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}