{"pageNumber":"4356","pageRowStart":"108875","pageSize":"25","recordCount":184900,"records":[{"id":70015006,"text":"70015006 - 1991 - Quantitative controls on submarine slope failure morphology","interactions":[],"lastModifiedDate":"2013-02-24T18:58:14","indexId":"70015006","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2670,"text":"Marine Geotechnology","active":true,"publicationSubtype":{"id":10}},"title":"Quantitative controls on submarine slope failure morphology","docAbstract":"The concept of the steady-state of deformation can be applied to predicting the ultimate form a landslide will take. The steady-state condition, defined by a line in void ratio-effective stress space, exists at large levels of strain and remolding. Conceptually, if sediment initially exists with void ratio-effective stress conditions above the steady-state line, the sediment shear strength will decrease during a transient loading event, such as an earthquake or storm. If the reduced shear strength existing at the steady state is less than the downslope shear stress induced by gravity, then large-scale internal deformation, disintegration, and flow will occur. -from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geotechnology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Taylor and Francis","doi":"10.1080/10641199109379887","issn":"03608867","usgsCitation":"Lee, H., Schwab, W.C., Edwards, B.D., and Kayen, R.E., 1991, Quantitative controls on submarine slope failure morphology: Marine Geotechnology, v. 10, no. 1-2, p. 143-157, https://doi.org/10.1080/10641199109379887.","startPage":"143","endPage":"157","numberOfPages":"15","costCenters":[],"links":[{"id":268172,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/10641199109379887"},{"id":224345,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9212e4b0c8380cd8062a","contributors":{"authors":[{"text":"Lee, H.J.","contributorId":96693,"corporation":false,"usgs":true,"family":"Lee","given":"H.J.","email":"","affiliations":[],"preferred":false,"id":369838,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schwab, W. C.","contributorId":78740,"corporation":false,"usgs":true,"family":"Schwab","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":369837,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Edwards, B. D.","contributorId":27056,"corporation":false,"usgs":true,"family":"Edwards","given":"B.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":369836,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kayen, R. E.","contributorId":14424,"corporation":false,"usgs":true,"family":"Kayen","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":369835,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70016624,"text":"70016624 - 1991 - Effects of uranium mining, Puerco River, New Mexico","interactions":[],"lastModifiedDate":"2012-03-12T17:18:47","indexId":"70016624","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Effects of uranium mining, Puerco River, New Mexico","docAbstract":"Effluent from uranium-mine dewatering and acidic water released by a tailings-pond dike failure increased radionuclide activities in streamflow in the Puerco River in New Mexico and Arizona. Median dissolved gross-alpha activity in the streamflow was 1,130 picocuries per liter from 1975 to 1986 when mine discharges ceased and 6.2 picocuries per liter from 1986 to 1989. From 1975 to July 1979, major ions in streamflow at the Puerco River at Gallup streamflow-gaging station were sodium, bicarbonate, and sulfate. On July 16, 1979, the day of the tailing spill, major ions in streamflow were magnesium, calcium, and sulfate. From 1979 to 1984, major ions in streamflow had a greater proportion of calcium and sulfate than prior to the spill, indicating flushing of residual tailings solution. Geochemical modeling of mine effluent indicates that uranium was unlikely to precipitate from effluent between the mines and Gallup or when mixed with wastewater downstream from Gallup. Geochemical modeling of acidic-tailings solution indicates that uranium was in solution as far downstream as Gallup. When the acidic-tailings solution mixed with 10- to 40-percent wastewater, uranium may have precipitated from solution as carnotite [K2(UO2)2(VO4)2] and tyuyamunite [Ca(UO2)2(VO4)2].","conferenceTitle":"Proceedings of the 1991 National Conference on Irrigation and Drainage","conferenceDate":"22 July 1991 through 26 July 1991","conferenceLocation":"Honolulu, HI, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872628116","usgsCitation":"Lopes, T.J., 1991, Effects of uranium mining, Puerco River, New Mexico, Proceedings of the 1991 National Conference on Irrigation and Drainage, Honolulu, HI, USA, 22 July 1991 through 26 July 1991, p. 508-515.","startPage":"508","endPage":"515","numberOfPages":"8","costCenters":[],"links":[{"id":225067,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a081ee4b0c8380cd519ae","contributors":{"authors":[{"text":"Lopes, Thomas J. tjlopes@usgs.gov","contributorId":2302,"corporation":false,"usgs":true,"family":"Lopes","given":"Thomas","email":"tjlopes@usgs.gov","middleInitial":"J.","affiliations":[],"preferred":true,"id":374068,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016625,"text":"70016625 - 1991 - Application of an iterative least-squares waveform inversion of strong-motion and teleseismic records to the 1978 Tabas, Iran, earthquake","interactions":[],"lastModifiedDate":"2023-10-26T00:17:18.721787","indexId":"70016625","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","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":"Application of an iterative least-squares waveform inversion of strong-motion and teleseismic records to the 1978 Tabas, Iran, earthquake","docAbstract":"An iterative least-squares technique is used to simultaneously invert the strong-motion records and teleseismic P waveforms for the 1978 Tabas, Iran, earthquake to deduce the rupture history. The effects of using different data sets and different parametrizations of the problem (linear versus nonlinear) are considered. A consensus of all the inversion runs indicates a complex, multiple source for the Tabas earthquake, with four main source regions over a fault length of 90 km and an average rupture velocity of 2.5 km/sec.
","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0810020305","usgsCitation":"Hartzell, S., and Mendoza, C., 1991, Application of an iterative least-squares waveform inversion of strong-motion and teleseismic records to the 1978 Tabas, Iran, earthquake: Bulletin of the Seismological Society of America, v. 81, no. 2, p. 305-331, https://doi.org/10.1785/BSSA0810020305.","productDescription":"27 p.","startPage":"305","endPage":"331","numberOfPages":"27","costCenters":[],"links":[{"id":422104,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.geoscienceworld.org/ssa/bssa/article/81/2/305/119398/Application-of-an-iterative-least-squares-waveform"},{"id":225068,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Iran","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n 55.959619141672704,\n 35.59561293693908\n ],\n [\n 55.959619141672704,\n 32.76041757496367\n ],\n [\n 59.65102539167262,\n 32.76041757496367\n ],\n [\n 59.65102539167262,\n 35.59561293693908\n ],\n [\n 55.959619141672704,\n 35.59561293693908\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"81","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec96e4b0c8380cd49370","contributors":{"authors":[{"text":"Hartzell, S.","contributorId":12603,"corporation":false,"usgs":true,"family":"Hartzell","given":"S.","email":"","affiliations":[],"preferred":false,"id":374069,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mendoza, C.","contributorId":82059,"corporation":false,"usgs":true,"family":"Mendoza","given":"C.","email":"","affiliations":[],"preferred":false,"id":374070,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016639,"text":"70016639 - 1991 - A new approach to plane-sweep overlay: topological structuring and line-segment classification","interactions":[],"lastModifiedDate":"2017-01-18T14:13:25","indexId":"70016639","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1192,"text":"Cartography and Geographic Information Systems","active":true,"publicationSubtype":{"id":10}},"title":"A new approach to plane-sweep overlay: topological structuring and line-segment classification","docAbstract":"An integrated approach to spatial overlay was developed with the objective of creating a single function that can perform most of the tasks now assigned to discrete functions in current systems. Two important components of this system are a unique method for topological structuring, and a method for attribute propagation and line-segment classification. -Author","language":"English","doi":"10.1559/152304091783805572","usgsCitation":"van Roessel, J.W., 1991, A new approach to plane-sweep overlay: topological structuring and line-segment classification: Cartography and Geographic Information Systems, v. 18, no. 1, p. 49-67, https://doi.org/10.1559/152304091783805572.","productDescription":"19 p.","startPage":"49","endPage":"67","numberOfPages":"19","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":224499,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269511,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1559/152304091783805572"}],"volume":"18","issue":"1","noUsgsAuthors":false,"publicationDate":"2013-03-14","publicationStatus":"PW","scienceBaseUri":"5059e49be4b0c8380cd46772","contributors":{"authors":[{"text":"van Roessel, Jan W.","contributorId":35745,"corporation":false,"usgs":true,"family":"van Roessel","given":"Jan","email":"","middleInitial":"W.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":374103,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016612,"text":"70016612 - 1991 - Distribution of rubidium, strontium, and zirconium in tuff from two deep coreholes at Yucca Mountain, Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:18:49","indexId":"70016612","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Distribution of rubidium, strontium, and zirconium in tuff from two deep coreholes at Yucca Mountain, Nevada","docAbstract":"Variations in concentrations of trace elements Rb, Sr, and Zr within the sequence of high-silica tuff and dacitic lava beneath Yucca Mountain reflect both primary composition and secondary alteration. Rb and K concentrations have parallel trends. Rb concentrations are significantly lower within intervals containing zeolitic nonwelded to partially welded and bedded tuffs and are higher in thick moderately to densely welded zones. Sr concentrations increase with depth from about 30 ppm in the Topopah Spring Member of the Paintbrush Tuff to almost 300 ppm in the older tuffs. Zr concentrations are about 100 ppm in the Topopah Spring Member and also increase with depth to about 150 ppm in the Lithic Ridge Tuff and upper part of the older tuffs. Conspicuous local high concentrations of Sr in the lower part of the Tram Member, in the dacite lava, and in unit c of the older tuffs in USW G-1, and in the densely welded zone of the Bullfrog Member in USW GU-3/G-3 closely correlate with high concentrations of less-mobile Zr and may reflect either primary composition or elemental redistribution resulting largely from smectitic alteration. Initial 87Sr/86Sr values from composite samples increase upward in units above the Bullfrog Member of the Crater Flat Tuff. The progressive tenfold increase in Sr with depth coupled with the similarity of initial 87Sr/86Sr values within the Bullfrog Member and older units to those of Paleozoic marine carbonates are consistent with a massive influx of Sr from water derived from a Paleozoic carbonate aquifer.","largerWorkTitle":"High Level Radioactive Waste Management","conferenceTitle":"Proceedings of the 2nd Annual International Conference on High Level Radioactive Waste Management","conferenceDate":"28 April 1991 through 3 May 1991","conferenceLocation":"Las Vegas, NV, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872628310","usgsCitation":"Spengler, R., and Peterman, Z., 1991, Distribution of rubidium, strontium, and zirconium in tuff from two deep coreholes at Yucca Mountain, Nevada, in High Level Radioactive Waste Management, Las Vegas, NV, USA, 28 April 1991 through 3 May 1991, p. 1416-1422.","startPage":"1416","endPage":"1422","numberOfPages":"7","costCenters":[],"links":[{"id":224883,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a02f7e4b0c8380cd5029f","contributors":{"editors":[{"text":"Anon","contributorId":128316,"corporation":true,"usgs":false,"organization":"Anon","id":536336,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Spengler, Richard W.","contributorId":91498,"corporation":false,"usgs":true,"family":"Spengler","given":"Richard W.","affiliations":[],"preferred":false,"id":374036,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peterman, Zell E. 0000-0002-5694-8082 peterman@usgs.gov","orcid":"https://orcid.org/0000-0002-5694-8082","contributorId":620,"corporation":false,"usgs":true,"family":"Peterman","given":"Zell E.","email":"peterman@usgs.gov","affiliations":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"preferred":false,"id":374035,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016617,"text":"70016617 - 1991 - Application of ground-penetrating-radar methods in hydrogeologic studies","interactions":[],"lastModifiedDate":"2019-10-16T06:53:06","indexId":"70016617","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Application of ground-penetrating-radar methods in hydrogeologic studies","docAbstract":"A ground-penetrating-radar system was used to study selected stratified-drift deposits in Connecticut. Ground-penetrating radar is a surface-geophysical method that depends on the emission, transmission, reflection, and reception of an electromagnetic pulse and can produce continuous high-resolution profiles of the subsurface rapidly and efficiently. Traverse locations on land included a well field in the town of Mansfield, a sand and gravel pit and a farm overlying a potential aquifer in the town of Coventry, and Haddam Meadows State Park in the town of Haddam. Traverse locations on water included the Willimantic River in Coventry and Mansfield Hollow Lake in Mansfield. The penetration depth of the radar signal ranged from about 20 feet in fine-grained glaciolacustrine sediments to about 70 feet in coarse sand and gravel. Some land records in coarse-grained sediments show a distinct, continuous reflection from the water table about 5 to 11 feet below land surface. Parallel reflectors on the records are interpreted as fine-grained sediments. Hummocky or chaotic reflectors are interpreted as cross-bedded or coarse-grained sediments. Other features observed on some of the radar records include the till and bedrock surface. Records collected on water had distinct water-bottom multiples (more than one reflection) and diffraction patterns from boulders. The interpretation of the radar records, which required little or no processing, was verified by using lithologic logs from test holes located along some of the land traverses and near the water traverses.","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1991.tb00528.x","issn":"0017467X","usgsCitation":"Beres, M., and Haeni, F., 1991, Application of ground-penetrating-radar methods in hydrogeologic studies: Ground Water, v. 29, no. 3, p. 375-386, https://doi.org/10.1111/j.1745-6584.1991.tb00528.x.","productDescription":"12 p.","startPage":"375","endPage":"386","numberOfPages":"12","costCenters":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"links":[{"id":224934,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Connecticut","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-71.799242,42.008065],[-71.797922,41.935395],[-71.797649,41.928556],[-71.794161,41.841101],[-71.794161,41.840141],[-71.792786,41.80867],[-71.792767,41.807001],[-71.791062,41.770273],[-71.789678,41.724734],[-71.789672,41.724569],[-71.786994,41.655992],[-71.787637,41.639917],[-71.789356,41.59691],[-71.789359,41.596852],[-71.797683,41.416709],[-71.81839,41.419599],[-71.839649,41.412119],[-71.842563,41.409855],[-71.843472,41.40583],[-71.842131,41.395359],[-71.833443,41.384524],[-71.831613,41.370899],[-71.837738,41.363529],[-71.835951,41.353935],[-71.829595,41.344544],[-71.839013,41.334042],[-71.860513,41.320248],[-71.859566,41.3224],[-71.868235,41.330941],[-71.886302,41.33641],[-71.91671,41.332217],[-71.922092,41.334518],[-71.923282,41.335113],[-71.936284,41.337959],[-71.945652,41.337799],[-71.956747,41.329871],[-71.970955,41.324526],[-71.979447,41.329987],[-71.982194,41.329861],[-71.988153,41.320577],[-72.021898,41.316838],[-72.084487,41.319634],[-72.094443,41.314164],[-72.09982,41.306998],[-72.11182,41.299098],[-72.134221,41.299398],[-72.16158,41.310262],[-72.173922,41.317597],[-72.177622,41.322497],[-72.184122,41.323997],[-72.191022,41.323197],[-72.201422,41.315697],[-72.203022,41.313197],[-72.204022,41.299097],[-72.212924,41.291365],[-72.225276,41.299047],[-72.235531,41.300413],[-72.248161,41.299488],[-72.251895,41.29862],[-72.250515,41.294386],[-72.251323,41.289997],[-72.261487,41.282926],[-72.31776,41.277782],[-72.327595,41.27846],[-72.333894,41.282916],[-72.34146,41.28011],[-72.348643,41.277446],[-72.348068,41.269698],[-72.386629,41.261798],[-72.398688,41.278172],[-72.40593,41.278398],[-72.451925,41.278885],[-72.472539,41.270103],[-72.485693,41.270881],[-72.499534,41.265866],[-72.506634,41.260099],[-72.51866,41.261253],[-72.521312,41.2656],[-72.529416,41.264421],[-72.533247,41.26269],[-72.536746,41.256207],[-72.537776,41.255646],[-72.546833,41.250718],[-72.547235,41.250499],[-72.570655,41.267744],[-72.571076,41.268054],[-72.571136,41.268098],[-72.583336,41.271698],[-72.585181,41.271321],[-72.585934,41.271168],[-72.586674,41.271017],[-72.587926,41.270761],[-72.589818,41.270375],[-72.590967,41.270141],[-72.598036,41.268698],[-72.607863,41.270387],[-72.610236,41.270795],[-72.617237,41.271998],[-72.617521,41.27194],[-72.617983,41.271845],[-72.631363,41.269092],[-72.641001,41.267108],[-72.641538,41.266998],[-72.642811,41.266884],[-72.650697,41.266178],[-72.653838,41.265897],[-72.653931,41.265931],[-72.654715,41.266219],[-72.662203,41.268964],[-72.662838,41.269197],[-72.667176,41.268192],[-72.671673,41.267151],[-72.672339,41.266997],[-72.674319,41.26552],[-72.684939,41.257597],[-72.685414,41.252607],[-72.685539,41.251297],[-72.689446,41.247629],[-72.690237,41.246887],[-72.690439,41.246697],[-72.693441,41.245493],[-72.694744,41.24497],[-72.69547,41.244948],[-72.701806,41.244752],[-72.706236,41.244615],[-72.707212,41.244585],[-72.708658,41.24454],[-72.708963,41.24453],[-72.709193,41.244523],[-72.710595,41.24448],[-72.710821,41.244812],[-72.713674,41.249007],[-72.711208,41.251018],[-72.71246,41.254167],[-72.722439,41.259138],[-72.732813,41.254727],[-72.754444,41.266913],[-72.757477,41.266913],[-72.786142,41.264796],[-72.818737,41.252244],[-72.819372,41.254061],[-72.826883,41.256755],[-72.847767,41.25669],[-72.85021,41.255544],[-72.854055,41.24774],[-72.861344,41.245297],[-72.881445,41.242597],[-72.895445,41.243697],[-72.900803,41.245864],[-72.904345,41.247297],[-72.905245,41.248297],[-72.903045,41.252797],[-72.902808,41.252894],[-72.894745,41.256197],[-72.89473,41.25626],[-72.893845,41.259897],[-72.89637,41.263949],[-72.903129,41.274794],[-72.907962,41.282549],[-72.9082,41.282932],[-72.916827,41.282033],[-72.917037,41.281905],[-72.920062,41.280056],[-72.920658,41.271574],[-72.920714,41.27078],[-72.920846,41.268897],[-72.931887,41.261139],[-72.933472,41.260024],[-72.935646,41.258497],[-72.956984,41.25292],[-72.959633,41.252228],[-72.961345,41.25178],[-72.962047,41.251597],[-72.983751,41.235364],[-72.985095,41.234358],[-72.986247,41.233497],[-72.997948,41.222697],[-73.003639,41.215287],[-73.007548,41.210197],[-73.013465,41.205479],[-73.013988,41.205062],[-73.014948,41.204297],[-73.020149,41.204097],[-73.020167,41.204237],[-73.020195,41.204446],[-73.02021,41.204568],[-73.020254,41.204906],[-73.020449,41.206397],[-73.022549,41.207197],[-73.024783,41.207435],[-73.045602,41.209658],[-73.05065,41.210197],[-73.054947,41.208468],[-73.05935,41.206697],[-73.07761,41.195176],[-73.07945,41.194015],[-73.09122,41.184153],[-73.092,41.1835],[-73.092147,41.183377],[-73.104328,41.17317],[-73.105483,41.172203],[-73.105493,41.172194],[-73.107987,41.168738],[-73.110352,41.159697],[-73.109952,41.156997],[-73.108352,41.153718],[-73.111052,41.150797],[-73.130253,41.146797],[-73.16437,41.158565],[-73.170074,41.160532],[-73.170701,41.164945],[-73.177774,41.166697],[-73.202656,41.158096],[-73.228295,41.142602],[-73.235058,41.143996],[-73.247958,41.126396],[-73.262358,41.117496],[-73.286759,41.127896],[-73.296359,41.125696],[-73.31186,41.116296],[-73.33066,41.109996],[-73.372296,41.10402],[-73.392162,41.087696],[-73.400154,41.086299],[-73.41367,41.073258],[-73.435063,41.056696],[-73.450364,41.057096],[-73.468239,41.051347],[-73.477364,41.035997],[-73.493327,41.048173],[-73.516903,41.038738],[-73.516766,41.029497],[-73.522666,41.019297],[-73.528866,41.016397],[-73.531169,41.021919],[-73.530189,41.028776],[-73.532786,41.03167],[-73.535338,41.03192],[-73.551494,41.024336],[-73.561968,41.016797],[-73.567668,41.010897],[-73.570068,41.001597],[-73.583968,41.000897],[-73.584988,41.010537],[-73.595699,41.015995],[-73.603952,41.015054],[-73.643478,41.002171],[-73.651175,40.995229],[-73.657336,40.985171],[-73.659671,40.987909],[-73.658772,40.993497],[-73.659372,40.999497],[-73.655571,41.007697],[-73.654671,41.011697],[-73.655371,41.012797],[-73.662672,41.020497],[-73.670472,41.030097],[-73.679973,41.041797],[-73.687173,41.050697],[-73.694273,41.059296],[-73.716875,41.087596],[-73.722575,41.093596],[-73.727775,41.100696],[-73.639672,41.141495],[-73.632153,41.144921],[-73.614391,41.152915],[-73.564941,41.17517],[-73.514617,41.198434],[-73.509487,41.200814],[-73.482709,41.21276],[-73.518384,41.256719],[-73.550961,41.295422],[-73.548929,41.307598],[-73.549574,41.315931],[-73.548973,41.326297],[-73.544728,41.366375],[-73.543425,41.376622],[-73.543415,41.376754],[-73.541169,41.405994],[-73.537673,41.433905],[-73.537469,41.43589],[-73.536969,41.441094],[-73.536067,41.451331],[-73.535986,41.45306],[-73.535885,41.455236],[-73.535857,41.455709],[-73.535769,41.457159],[-73.534369,41.475894],[-73.534269,41.476394],[-73.534269,41.476911],[-73.53415,41.47806],[-73.534055,41.478968],[-73.533969,41.479693],[-73.530067,41.527194],[-73.521041,41.619773],[-73.520017,41.641197],[-73.518238,41.666734],[-73.516785,41.687581],[-73.511921,41.740941],[-73.510961,41.758749],[-73.505008,41.823773],[-73.504944,41.824285],[-73.501984,41.858717],[-73.498304,41.892508],[-73.496527,41.92238],[-73.492975,41.958524],[-73.489615,42.000092],[-73.487314,42.049638],[-73.432812,42.050587],[-73.29442,42.046984],[-73.293097,42.04694],[-73.231056,42.044945],[-73.229798,42.044877],[-73.127276,42.041964],[-73.053254,42.039861],[-73.008745,42.03886],[-72.999549,42.038653],[-72.863733,42.03771],[-72.863619,42.037709],[-72.847142,42.036894],[-72.813541,42.036494],[-72.816741,41.997595],[-72.774757,42.002129],[-72.766739,42.002995],[-72.766139,42.007695],[-72.763265,42.009742],[-72.763238,42.012795],[-72.761238,42.014595],[-72.759738,42.016995],[-72.761354,42.018183],[-72.76231,42.019775],[-72.762151,42.021527],[-72.760558,42.021846],[-72.758151,42.020865],[-72.757467,42.020947],[-72.754038,42.025395],[-72.751738,42.030195],[-72.753538,42.032095],[-72.757538,42.033295],[-72.755838,42.036195],[-72.714134,42.036608],[-72.695927,42.036788],[-72.643134,42.032395],[-72.607933,42.030795],[-72.606933,42.024995],[-72.590233,42.024695],[-72.582332,42.024695],[-72.573231,42.030141],[-72.528131,42.034295],[-72.509192,42.034217],[-72.45668,42.033999],[-72.317148,42.031907],[-72.249523,42.031626],[-72.135715,42.030245],[-72.135687,42.030245],[-72.102162,42.028899],[-72.063496,42.027347],[-71.987326,42.02688],[-71.89078,42.024368],[-71.80065,42.023569],[-71.799242,42.008065]]]},\"properties\":{\"name\":\"Connecticut\",\"nation\":\"USA \"}}]}","volume":"29","issue":"3","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"5059eca2e4b0c8380cd493c9","contributors":{"authors":[{"text":"Beres, Milan Jr.","contributorId":78095,"corporation":false,"usgs":true,"family":"Beres","given":"Milan","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":374049,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haeni, F.P.","contributorId":87105,"corporation":false,"usgs":true,"family":"Haeni","given":"F.P.","affiliations":[],"preferred":false,"id":374050,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016383,"text":"70016383 - 1991 - Tidal stirring and phytoplankton bloom dynamics in an estuary","interactions":[],"lastModifiedDate":"2016-07-27T10:56:00","indexId":"70016383","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2379,"text":"Journal of Marine Research","active":true,"publicationSubtype":{"id":10}},"title":"Tidal stirring and phytoplankton bloom dynamics in an estuary","docAbstract":"In South San Francisco Bay, estuarine phytoplankton biomass fluctuates at the time scale of days to weeks; much of this variability is associated with fluctuations in tidal energy. During the spring seasons of every year from 1980-1990, episodic blooms occurred in which phytoplankton biomass rose from a baseline of 2-4mg chlorophyll a m-3, peaked at 20-40 chlorophyll a m-3, then returned to baseline values, all within several weeks. Each episode of biomass increase occurred during neap tides, and each bloom decline coincided with spring tides. This suggests that daily variations in the rate of vertical mixing by tidal stirring might control phytoplankton bloom dynamics in some estuaries. Simulation experiments with a numerical model of phytoplankton population dynamics support this hypothesis. -from Author
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Marine Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00222402","usgsCitation":"Cloern, J., 1991, Tidal stirring and phytoplankton bloom dynamics in an estuary: Journal of Marine Research, v. 49, no. 1, p. 203-221.","startPage":"203","endPage":"221","numberOfPages":"19","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":222852,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"49","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb37be4b08c986b325df3","contributors":{"authors":[{"text":"Cloern, J. E.","contributorId":59453,"corporation":false,"usgs":true,"family":"Cloern","given":"J. E.","affiliations":[],"preferred":false,"id":373334,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":1004067,"text":"1004067 - 1991 - Lead poisoning of a marbled godwit","interactions":[],"lastModifiedDate":"2022-03-07T15:27:57.684341","indexId":"1004067","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3580,"text":"The Prairie Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Lead poisoning of a marbled godwit","docAbstract":"A thin adult female marbled godwit (Limosa fedoa) found dead at Benton Lake National Wildlife Refuge, Montana, was found to have 17 ingested lead shot in its gizzard. Its liver contained 51.7 ppm lead (wet weight). Based on these necropsy findings a diagnosis of lead poisoning was made.
","language":"English","publisher":"Eagle Hill Publications","usgsCitation":"Locke, L.N., Smith, M.R., Windingstad, R.M., and Martin, S.J., 1991, Lead poisoning of a marbled godwit: The Prairie Naturalist, v. 23, no. 1, p. 21-24.","productDescription":"4 p.","startPage":"21","endPage":"24","numberOfPages":"4","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"links":[{"id":135196,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Benton Lake National Wildlife Refuge","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -111.38282775878906,\n 47.705372030204025\n ],\n [\n -111.33750915527344,\n 47.70490995475603\n ],\n [\n -111.31622314453125,\n 47.697516190510555\n ],\n [\n -111.3028335571289,\n 47.689890272830304\n ],\n [\n -111.28772735595703,\n 47.677177931734406\n ],\n [\n -111.27159118652344,\n 47.66423127417956\n ],\n [\n -111.25957489013672,\n 47.649893728326944\n ],\n [\n -111.25957489013672,\n 47.63971630732309\n ],\n [\n -111.25991821289062,\n 47.63069375368569\n ],\n [\n -111.25991821289062,\n 47.618661258713864\n ],\n [\n -111.26094818115234,\n 47.611718174784954\n ],\n [\n -111.28051757812499,\n 47.61588413576999\n ],\n [\n -111.30558013916016,\n 47.62190104905555\n ],\n [\n -111.31931304931639,\n 47.62537203020587\n ],\n [\n -111.3296127319336,\n 47.631387851583746\n ],\n [\n -111.34883880615234,\n 47.6441113460123\n ],\n [\n -111.36669158935545,\n 47.653825382654695\n ],\n [\n -111.3907241821289,\n 47.658219234272856\n ],\n [\n -111.41166687011719,\n 47.65151268066222\n ],\n [\n -111.42196655273438,\n 47.65636923655091\n ],\n [\n -111.40514373779295,\n 47.698902601182304\n ],\n [\n -111.38694763183594,\n 47.706527200903395\n ],\n [\n -111.38282775878906,\n 47.705372030204025\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"23","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1ae4b07f02db6a888a","contributors":{"authors":[{"text":"Locke, L. N.","contributorId":73539,"corporation":false,"usgs":true,"family":"Locke","given":"L.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":315091,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, M. R.","contributorId":40551,"corporation":false,"usgs":true,"family":"Smith","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":315088,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Windingstad, R. M.","contributorId":71124,"corporation":false,"usgs":true,"family":"Windingstad","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":315090,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Martin, S. J.","contributorId":70361,"corporation":false,"usgs":true,"family":"Martin","given":"S.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":315089,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70016788,"text":"70016788 - 1991 - Major element, REE, and Pb, Nd and Sr isotopic geochemistry of Cenozoic volcanic rocks of eastern China: Implications for their origin from suboceanic-type mantle reservoirs","interactions":[],"lastModifiedDate":"2023-12-09T01:09:35.74672","indexId":"70016788","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Major element, REE, and Pb, Nd and Sr isotopic geochemistry of Cenozoic volcanic rocks of eastern China: Implications for their origin from suboceanic-type mantle reservoirs","docAbstract":"Major- and rare-earth-element (REE) concentrations and U![\"single](\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\")
ThPb, SmNd, and RbSr isotope systematics are reported for Cenozoic volcanic rocks from northeastern and eastern China. These volcanic rocks, characteristically lacking the calc-alkaline suite of orogenic belts, were emplaced in a rift system which formed in response to the subduction of the western Pacific plate beneath the eastern Asiatic continental margin. The rocks sampled range from basanite and alkali olivine basalt, through olivine tholeiite and quartz tholeiite, to potassic basalts, alkali trachytes, pantellerite, and limburgite. These rock suites represent the volcanic centers of Datong, Hanobar, Kuandian, Changbaishan and Wudalianchi in northeastern China, and Mingxi in the Fujian Province of eastern China.
","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(91)90127-4","issn":"0012821X","usgsCitation":"Basu, A.R., Wang, J., Huang, W., Xie, G., and Tatsumoto, M., 1991, Major element, REE, and Pb, Nd and Sr isotopic geochemistry of Cenozoic volcanic rocks of eastern China: Implications for their origin from suboceanic-type mantle reservoirs: Earth and Planetary Science Letters, v. 105, no. 1-3, p. 149-169, https://doi.org/10.1016/0012-821X(91)90127-4.","productDescription":"21 p.","startPage":"149","endPage":"169","numberOfPages":"21","costCenters":[],"links":[{"id":479770,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/0012-821x(91)90127-4","text":"Publisher Index Page"},{"id":225184,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"105","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4c0fe4b0c8380cd6999f","contributors":{"authors":[{"text":"Basu, A. R.","contributorId":99697,"corporation":false,"usgs":true,"family":"Basu","given":"A.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":374500,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wang, Junwen","contributorId":17768,"corporation":false,"usgs":true,"family":"Wang","given":"Junwen","email":"","affiliations":[],"preferred":false,"id":374497,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Huang, Wankang","contributorId":11771,"corporation":false,"usgs":true,"family":"Huang","given":"Wankang","email":"","affiliations":[],"preferred":false,"id":374496,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Xie, Guanghong","contributorId":83677,"corporation":false,"usgs":true,"family":"Xie","given":"Guanghong","email":"","affiliations":[],"preferred":false,"id":374499,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tatsumoto, M.","contributorId":76798,"corporation":false,"usgs":true,"family":"Tatsumoto","given":"M.","email":"","affiliations":[],"preferred":false,"id":374498,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70016343,"text":"70016343 - 1991 - The neutral oil in commercial linear alkylbenzenesulfonate and its effect on organic solute solubility in water","interactions":[],"lastModifiedDate":"2023-10-19T01:21:18.751516","indexId":"70016343","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"The neutral oil in commercial linear alkylbenzenesulfonate and its effect on organic solute solubility in water","docAbstract":"No abstract available.
","language":"English","publisher":"American Chemical Society","doi":"10.1021/es00016a008","issn":"0013936X","usgsCitation":"Chiou, C.T., Kile, D.E., and Rutherford, D., 1991, The neutral oil in commercial linear alkylbenzenesulfonate and its effect on organic solute solubility in water: Environmental Science & Technology, v. 25, no. 4, p. 660-665, https://doi.org/10.1021/es00016a008.","productDescription":"6 p.","startPage":"660","endPage":"665","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":223107,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"4","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505bae10e4b08c986b323ee7","contributors":{"authors":[{"text":"Chiou, C. T.","contributorId":97080,"corporation":false,"usgs":true,"family":"Chiou","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":373231,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kile, D. E.","contributorId":22758,"corporation":false,"usgs":true,"family":"Kile","given":"D.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":373230,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rutherford, D.W.","contributorId":21244,"corporation":false,"usgs":true,"family":"Rutherford","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":373229,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70016430,"text":"70016430 - 1991 - Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California","interactions":[{"subject":{"id":20452,"text":"ofr90573 - 1990 - Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California","indexId":"ofr90573","publicationYear":"1990","noYear":false,"title":"Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California"},"predicate":"SUPERSEDED_BY","object":{"id":70016430,"text":"70016430 - 1991 - Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California","indexId":"70016430","publicationYear":"1991","noYear":false,"title":"Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California"},"id":1}],"lastModifiedDate":"2018-09-25T11:10:14","indexId":"70016430","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California","docAbstract":"The occurrence of selenium in agricultural drain water from the western San Joaquin Valley, California, has focused concern on the semiconfined ground-water flow system, which is underlain by the Corcoran Clay Member of the Tulare Formation. A two-step procedure is used to calibrate a preliminary model of the system for the purpose of determining the steady-state hydraulic properties. Horizontal and vertical hydraulic conductivities are modeled as functions of the percentage of coarse sediment, hydraulic conductivities of coarse-textured (Kcoarse) and fine-textured (Kfine) end members, and averaging methods used to calculate equivalent hydraulic conductivities. The vertical conductivity of the Corcoran (Kcorc) is an additional parameter to be evaluated.\n\nIn the first step of the calibration procedure, the model is run by systematically varying the following variables: (1) Kcoarse/Kfine, (2) Kcoarse/Kcorc, and (3) choice of averaging methods in the horizontal and vertical directions. Root mean square error and bias values calculated from the model results are functions of these variables. These measures of error provide a means for evaluating model sensitivity and for selecting values of Kcoarse, Kfine, and Kcorc for use in the second step of the calibration procedure. In the second step, recharge rates are evaluated as functions of Kcoarse, Kcorc, and a combination of averaging methods. The associated Kfine values are selected so that the root mean square error is minimized on the basis of the results from the first step.\n\nThe results of the two-step procedure indicate that the spatial distribution of hydraulic conductivity that best produces the measured hydraulic head distribution is created through the use of arithmetic averaging in the horizontal direction and either geometric or harmonic averaging in the vertical direction. The equivalent hydraulic conductivities resulting from either combination of averaging methods compare favorably to field- and laboratory-based values.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1991.tb00562.x","issn":"0017467X","usgsCitation":"Phillips, S.P., and Belitz, K., 1991, Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California: Ground Water, v. 29, no. 5, p. 702-715, https://doi.org/10.1111/j.1745-6584.1991.tb00562.x.","productDescription":"14 p.","startPage":"702","endPage":"715","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":222971,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":272974,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.1991.tb00562.x"}],"country":"United States","state":"California","otherGeospatial":"San Joaquin Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -121.8438,35.0589 ], [ -121.8438,38.1663 ], [ -118.6734,38.1663 ], [ -118.6734,35.0589 ], [ -121.8438,35.0589 ] ] ] } } ] }","volume":"29","issue":"5","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"5059f315e4b0c8380cd4b5b6","contributors":{"authors":[{"text":"Phillips, Steven P. 0000-0002-5107-868X sphillip@usgs.gov","orcid":"https://orcid.org/0000-0002-5107-868X","contributorId":1506,"corporation":false,"usgs":true,"family":"Phillips","given":"Steven","email":"sphillip@usgs.gov","middleInitial":"P.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":373491,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Belitz, Kenneth 0000-0003-4481-2345 kbelitz@usgs.gov","orcid":"https://orcid.org/0000-0003-4481-2345","contributorId":442,"corporation":false,"usgs":true,"family":"Belitz","given":"Kenneth","email":"kbelitz@usgs.gov","affiliations":[{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true},{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":376,"text":"Massachusetts Water Science Center","active":true,"usgs":true},{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"preferred":true,"id":373490,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016509,"text":"70016509 - 1991 - Terraces on the Florida escarpment: Implications for erosional processes","interactions":[],"lastModifiedDate":"2017-10-04T14:20:31","indexId":"70016509","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Terraces on the Florida escarpment: Implications for erosional processes","docAbstract":"SeaBeam bathymetric data and GLORIA (Geologic LOng-Range Inclined Asdic) sidescan sonar images of a 175-km-long section of the Florida escarpment in the eastern Guff of Mexico show that this carbonate escarpment has been eroded since its initial formation, but its morphology suggests that erosional processes have not acted uniformly on the escarpment. Parts of the escarpment are notched by box canyons that have extremely steep headwalls and may be sites off active ground-water sapping. The intercanyon areas commonly have previously unrecognized terraces below 2600 m. Above 2600 m, the escarpment is steeper and has no terraces. The terraces may reflect differences in platform strata exposed at the escarpment that are responding differently to erosional processes.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1991)019<0897:TOTFEI>2.3.CO;2","issn":"00917613","usgsCitation":"Twichell, D., Paull, C.K., and Parson, L., 1991, Terraces on the Florida escarpment: Implications for erosional processes: Geology, v. 19, no. 9, p. 897-900, https://doi.org/10.1130/0091-7613(1991)019<0897:TOTFEI>2.3.CO;2.","productDescription":"4 p.","startPage":"897","endPage":"900","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":223427,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Gulf of Mexico","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -83.968505859375,\n 25.005972656239187\n ],\n [\n -79.47509765625,\n 25.005972656239187\n ],\n [\n -79.47509765625,\n 29.907329376851553\n ],\n [\n -83.968505859375,\n 29.907329376851553\n ],\n [\n -83.968505859375,\n 25.005972656239187\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"19","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba54ee4b08c986b320972","contributors":{"authors":[{"text":"Twichell, D.C.","contributorId":84304,"corporation":false,"usgs":true,"family":"Twichell","given":"D.C.","affiliations":[],"preferred":false,"id":373755,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Paull, C. K.","contributorId":86845,"corporation":false,"usgs":false,"family":"Paull","given":"C.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":373756,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parson, L.M.","contributorId":69156,"corporation":false,"usgs":true,"family":"Parson","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":373754,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70016954,"text":"70016954 - 1991 - Origin of late dolomite cement by CO2-saturated deep basin brines: evidence from the Ozark region, central United States","interactions":[],"lastModifiedDate":"2024-01-23T12:12:47.389089","indexId":"70016954","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Origin of late dolomite cement by CO2-saturated deep basin brines: evidence from the Ozark region, central United States","docAbstract":"Studies of fluid inclusions in regionally extensive late dolomite cement (LDC) throughout the Ozark region show that CO2 effervescence was widespread during dolomite precipitation. On the basis of quantitative analyses of inclusion fluids, reaction-path modeling shows that LDC with trace amounts of sulfides can be deposited by effervescence of a CO2-saturated basin brine as it migrates to shallower levels and lower confining pressures. This precipitation mechanism best explains occurrences of LDC in the Ozark region and may account for LDC found in sedimentary basins worldwide.
An integrated exploration study is presented to locate low-temperature geothermal reservoirs in the Honey Lake area of northern California. Regional studies to locate the geothermal resources included gravity, infra-red, water-temperature, and water-quality analyses. Five anomalies were mapped from resistivity surveys. Additional study of three anomalies by temperature-gradient and seismic methods was undertaken to define structure and potential of the geothermal resource. The gravity data show a graben structure in the area. Seismic reflection data indicate faults associated with surface-resistivity and temperature-gradient data. The data support the interpretation that the shallow reservoirs are replenished along the fault zones by deeply circulating heated meteoric waters.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1365-2478.1991.tb00313.x","usgsCitation":"Schimschal, U., 1991, Integrated exploration for low-temperature geothermal resources in the Honey Lake Basin, California: Geophysical Prospecting, v. 39, no. 2, p. 279-291, https://doi.org/10.1111/j.1365-2478.1991.tb00313.x.","productDescription":"13 p.","startPage":"279","endPage":"291","numberOfPages":"13","costCenters":[],"links":[{"id":224472,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Honey Lake Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -120.12227145807901,\n 40.27126914321664\n ],\n [\n -120.12227145807901,\n 40.51461906219083\n ],\n [\n -120.6566182403823,\n 40.51461906219083\n ],\n [\n -120.6566182403823,\n 40.27126914321664\n ],\n [\n -120.12227145807901,\n 40.27126914321664\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"39","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-04-27","publicationStatus":"PW","scienceBaseUri":"505a3c5ee4b0c8380cd62cad","contributors":{"authors":[{"text":"Schimschal, Ulrich","contributorId":92258,"corporation":false,"usgs":true,"family":"Schimschal","given":"Ulrich","email":"","affiliations":[],"preferred":false,"id":374965,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016938,"text":"70016938 - 1991 - Paleoshorelines, reefs, and a rising sea: South Florida, USA","interactions":[],"lastModifiedDate":"2017-09-14T11:40:23","indexId":"70016938","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2220,"text":"Journal of Coastal Research","active":true,"publicationSubtype":{"id":10}},"title":"Paleoshorelines, reefs, and a rising sea: South Florida, USA","docAbstract":"The porous limestone bedrock, thin sediment cover, and tectonic stability of the Florida Platform during the past 15 ka BP provide an exceptionally suitable setting for reconstruction of paleoshorelines and onshore projection of future shorelines in a rising-sea scenario. Paleoshorelines for 8, 6, 4 and 2 ka BP show that 1) a series of limestone islands formed, then drowned, along the outer platform; 2) a distinct trough, called Hawk Channel, separated the outer islands from shore; 3) the lower Keys flooded earlier and more rapidly than the rest of the Keys; and 4) Florida Bay and tidal passes through the middle Keys into the bay developed within the past 4 ka BP. Projection of future shorelines onto land shows that most land forming the Florida Keys would flood in a rise of 1 to 2 m and that a rise of little more than 5 m would submerge all land. Offshore reefs would die, while nearshore reefs would shift landward as the mainland shoreline migrated northward. -from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Coastal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"07490208","usgsCitation":"Lidz, B.H., and Shinn, E., 1991, Paleoshorelines, reefs, and a rising sea: South Florida, USA: Journal of Coastal Research, v. 7, no. 1, p. 203-229.","productDescription":"27 p.","startPage":"203","endPage":"229","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":225040,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":345767,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://journals.fcla.edu/jcr/article/view/78436"}],"country":"United States","state":"Florida","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -82.28759765625,\n 24.407137917727667\n ],\n [\n -79.7607421875,\n 24.407137917727667\n ],\n [\n -79.7607421875,\n 25.64152637306577\n ],\n [\n -82.28759765625,\n 25.64152637306577\n ],\n [\n -82.28759765625,\n 24.407137917727667\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"7","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a744fe4b0c8380cd77592","contributors":{"authors":[{"text":"Lidz, B. H.","contributorId":30651,"corporation":false,"usgs":true,"family":"Lidz","given":"B.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":374918,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shinn, E.A.","contributorId":38610,"corporation":false,"usgs":true,"family":"Shinn","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":374919,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016597,"text":"70016597 - 1991 - Fault stability inferred from granite sliding experiments at hydrothermal conditions","interactions":[],"lastModifiedDate":"2024-02-13T01:09:24.071654","indexId":"70016597","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Fault stability inferred from granite sliding experiments at hydrothermal conditions","docAbstract":"Seismicity on crustal faults is concentrated in the depth interval 1–3 to 12–15km. Tse and Rice (1986) suggested that the lower bound on seismicity is due to a switch with increasing temperature from velocity weakening (destabilizing) to velocity strengthening (stabilizing) friction. They inferred this transition from friction data for dry granite; however, pore fluids exist at elevated temperatures throughout the crust, and may strongly influence strength and sliding behavior. We present new data from sliding experiments on granite at elevated T (23° to 600°) plus elevated PH2O (100 MPa),
","largerWorkType":{"id":2,"text":"Article"},"language":"English","publisher":"American Geophysical Union","doi":"10.1029/91GL00469","issn":"00948276","usgsCitation":"Blanpied, M., Lockner, D., and Byerlee, J., 1991, Fault stability inferred from granite sliding experiments at hydrothermal conditions: Geophysical Research Letters, v. 18, no. 4, p. 609-612, https://doi.org/10.1029/91GL00469.","productDescription":"4 p.","startPage":"609","endPage":"612","numberOfPages":"4","costCenters":[],"links":[{"id":479713,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/91gl00469","text":"Publisher Index Page"},{"id":222962,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"18","issue":"4","noUsgsAuthors":false,"publicationDate":"2012-12-07","publicationStatus":"PW","scienceBaseUri":"505a0f1be4b0c8380cd53784","contributors":{"authors":[{"text":"Blanpied, M.L.","contributorId":61961,"corporation":false,"usgs":true,"family":"Blanpied","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":373994,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lockner, D.A. 0000-0001-8630-6833","orcid":"https://orcid.org/0000-0001-8630-6833","contributorId":85603,"corporation":false,"usgs":true,"family":"Lockner","given":"D.A.","affiliations":[],"preferred":false,"id":373996,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Byerlee, J.D.","contributorId":69982,"corporation":false,"usgs":true,"family":"Byerlee","given":"J.D.","affiliations":[],"preferred":false,"id":373995,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70016733,"text":"70016733 - 1991 - Development and application of a hillslope hydrologic model","interactions":[],"lastModifiedDate":"2023-02-02T11:56:57.589053","indexId":"70016733","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","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":"Development and application of a hillslope hydrologic model","docAbstract":"A vertically integrated two-dimensional lateral flow model of soil moisture has been developed. Derivation of the governing equation is based on a physical interpretation of hillslope processes. The lateral subsurface-flow model permits variability of precipitation and evapotranspiration, and allows arbitrary specification of soil-moisture retention properties. Variable slope, soil thickness, and saturation are all accommodated. The numerical solution method, a Crank-Nicolson, finite-difference, upstream-weighted scheme, is simple and robust. A small catchment in northeastern Kansas is the subject of an application of the lateral subsurface-flow model. Calibration of the model using observed discharge provides estimates of the active porosity (0.1 cm3/cm3) and of the saturated horizontal hydraulic conductivity (40 cm/hr). The latter figure is at least an order of magnitude greater than the vertical hydraulic conductivity associated with the silty clay loam soil matrix. The large value of hydraulic conductivity derived from the calibration is suggestive of macropore-dominated hillslope drainage. The corresponding value of active porosity agrees well with a published average value of the difference between total porosity and field capacity for a silty clay loam.
","language":"English","publisher":"Elsevier","doi":"10.1016/0309-1708(91)90012-D","usgsCitation":"Blain, C.A., and Milly, P., 1991, Development and application of a hillslope hydrologic model: Advances in Water Resources, v. 14, no. 4, p. 168-174, https://doi.org/10.1016/0309-1708(91)90012-D.","productDescription":"7 p.","startPage":"168","endPage":"174","numberOfPages":"7","costCenters":[],"links":[{"id":225181,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0017e4b0c8380cd4f5ab","contributors":{"authors":[{"text":"Blain, C. A.","contributorId":45843,"corporation":false,"usgs":false,"family":"Blain","given":"C.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":374344,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milly, P. C. D.","contributorId":100489,"corporation":false,"usgs":true,"family":"Milly","given":"P. C. D.","affiliations":[],"preferred":false,"id":374345,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016510,"text":"70016510 - 1991 - Selectivity and effectiveness of extractants used to release metals associated with organic matter","interactions":[],"lastModifiedDate":"2019-03-28T06:36:46","indexId":"70016510","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Selectivity and effectiveness of extractants used to release metals associated with organic matter","docAbstract":"Partial extraction procedures can be used to release metals associated with organic matter in natural materials. Reagents commonly employed for this purpose include hydrogen peroxide, Na hypochlorite and Na pyrophosphate. This study tested the selectivity of these reagents by comparing the amount of Fe, Mn, Zn and Cu they released from sulfide and oxide minerals and determined the ability of these reagents to release the same metals from peat. Sodium hypochlorite and Na pyrophosphate released between 0.2 and 8.7% of the total metal content of the Fe, Cu and Zn minerals. In contrast, three commonly used hydrogen peroxide reagents released significantly more metals from the oxides and sulfides. Percentages of Zn and Mn released from the peat samples were comparable for all extractions tested. Per cent Cu released from peat by Na pyrophosphate was very low compared to that released by hydrogen peroxide/HNO3 or na hypochlorite. A smaller fraction of Fe was released from peat by Na hypochlorite than by the other reagents. Iron release by Na hypochlorite correlates with the organic carbon content of the peat samples. A universal extractant for metals associated with organic matter in all types of samples has not been identified. Sodium hypochlorite and Na pyrophosphate are better than hydrogen peroxide in selectively releasing metals bound to organic matter because they do not release significant amounts of metals from oxide and sulfide minerals.
Underwater observation of active submarine lava flows from Kilauea volcano, Hawaii, in March-June 1989 revealed both pillow lava and highly channelized lava streams flowing down a steep and unconsolidated lava delta. The channelized streams were 0.7-1.5 m across and moved at rates of 1-3 m/s. The estimated flux of a stream was 0.7 m3/s. Jets of hydrothermal water and gas bubbles were associated with the volcanic activity. The rapidly moving channelized lava streams represent a previously undescribed aspect of submarine volcanism.
Porkchop Geyser, in Yellowstone National Park, was the site of a small hydrothermal explosion on September 5, 1989. In the early 1960s, this was a quiescent spring with an intermittent seeping discharge. Infrequent geyser eruptions 3-5 m high started in 1971, and in 1985 the geyser began erupting as a perpetual spouter 6-9 m high. Perpetual spouting at the latter height continued until just before the catastrophic hydrothermal event when the geyser column suddenly rose to a height of 20-30 m, followed immediately by the explosive ejection of sinter blocks up to 1.88 m in maximum dimension and formation of an irregular crater 13.9 m long and 11.7 m wide. The ejected blocks show a variety of siliceous deposits indicative of changing environments of deposition with time, and possibly of prior hydrothermal explosive activity at this site.
Water samples from Porkchop were collected and analyzed once in the 1920s, again in 1951, ten times between 1960 and mid-1989, and once in January 1990 after the explosion. Chemical geothermometry shows an increase in the temperature of last water-rock equilibration of about 60 to 70 °C from 1962 through 1989. This may have been the result of drawing water progressively from different and hotter regions of a single reservoir or mixing waters from two different reservoirs with a progressively larger proportion of water being drawn from the hotter reservoir from 1962 through 1989. Boiling of ascending fluids coming from hotter subsurface regions resulted in an increase in the proportion of steam to water discharged by the geyser. A constriction at the exit of the geyser tube throttled the flow of water and steam and allowed water in shallow cavities adjacent to the geyser tube to become heated to the boiling point at pressures greater than normal hydrostatic. We hypothesize that a sudden breaking loose of this constriction, likely triggered by a seasonal increase in subsurface boiling throughout Norris Basin, allowed water and steam to be discharged from Porkchop much more rapidly than previously. This resulted in a drop in pressure within the geyser tube, causing water in adjacent connected chambers to become superheated. An ensuing rapid flashing of superheated water to steam within relatively confined spaces resulted in the hydrothermal explosion.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1991)103<1114:CLTARS>2.3.CO;2","usgsCitation":"Fournier, R., Thompson, J., Cunningham, C.G., and Hutchinson, R., 1991, Conditions leading to a recent small hydrothermal explosion at Yellowstone National Park: Geological Society of America Bulletin, v. 103, no. 8, p. 1114-1120, https://doi.org/10.1130/0016-7606(1991)103<1114:CLTARS>2.3.CO;2.","productDescription":"7 p.","startPage":"1114","endPage":"1120","numberOfPages":"7","costCenters":[],"links":[{"id":223429,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Yellowstone National Park","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -111.2564548380432,\n 45.091181880233194\n ],\n [\n -111.2564548380432,\n 43.10320259097256\n ],\n [\n -108.61973608804327,\n 43.10320259097256\n ],\n [\n -108.61973608804327,\n 45.091181880233194\n ],\n [\n -111.2564548380432,\n 45.091181880233194\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"103","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9b6e4b0c8380cd4d747","contributors":{"authors":[{"text":"Fournier, R.O.","contributorId":73584,"corporation":false,"usgs":true,"family":"Fournier","given":"R.O.","email":"","affiliations":[],"preferred":false,"id":373761,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, J. M.","contributorId":77142,"corporation":false,"usgs":true,"family":"Thompson","given":"J. M.","affiliations":[],"preferred":false,"id":373763,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cunningham, C. G.","contributorId":76741,"corporation":false,"usgs":true,"family":"Cunningham","given":"C.","middleInitial":"G.","affiliations":[],"preferred":false,"id":373762,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hutchinson, R. A.","contributorId":62218,"corporation":false,"usgs":true,"family":"Hutchinson","given":"R. A.","affiliations":[],"preferred":false,"id":373760,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70016651,"text":"70016651 - 1991 - Sensitivity analysis of a ground-water-flow model","interactions":[],"lastModifiedDate":"2012-03-12T17:18:50","indexId":"70016651","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Sensitivity analysis of a ground-water-flow model","docAbstract":"A sensitivity analysis was performed on 18 hydrological factors affecting steady-state groundwater flow in the Upper Floridan aquifer near Albany, southwestern Georgia. Computations were based on a calibrated, two-dimensional, finite-element digital model of the stream-aquifer system and the corresponding data inputs. Flow-system sensitivity was analyzed by computing water-level residuals obtained from simulations involving individual changes to each hydrological factor. Hydrological factors to which computed water levels were most sensitive were those that produced the largest change in the sum-of-squares of residuals for the smallest change in factor value. Plots of the sum-of-squares of residuals against multiplier or additive values that effect change in the hydrological factors are used to evaluate the influence of each factor on the simulated flow system. The shapes of these 'sensitivity curves' indicate the importance of each hydrological factor to the flow system. Because the sensitivity analysis can be performed during the preliminary phase of a water-resource investigation, it can be used to identify the types of hydrological data required to accurately characterize the flow system prior to collecting additional data or making management decisions.","largerWorkTitle":"Symposium on Ground Water","conferenceTitle":"Proceedings of the International Symposium on Ground Water in Practice","conferenceDate":"29 July 1991 through 2 August 1991","conferenceLocation":"Nashville, TN, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872628175","usgsCitation":"Torak, L.J., 1991, Sensitivity analysis of a ground-water-flow model, in Symposium on Ground Water, Nashville, TN, USA, 29 July 1991 through 2 August 1991, p. 40-45.","startPage":"40","endPage":"45","numberOfPages":"6","costCenters":[],"links":[{"id":224648,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d21e4b08c986b318288","contributors":{"editors":[{"text":"Lennon Gerard P.Rouhani Shahrokh","contributorId":128299,"corporation":true,"usgs":false,"organization":"Lennon Gerard P.Rouhani Shahrokh","id":536338,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Torak, Lynn J. ljtorak@usgs.gov","contributorId":401,"corporation":false,"usgs":true,"family":"Torak","given":"Lynn","email":"ljtorak@usgs.gov","middleInitial":"J.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":374136,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016720,"text":"70016720 - 1991 - Assessment of fracture-sampling techniques for laboratory tests on core","interactions":[],"lastModifiedDate":"2012-03-12T17:18:50","indexId":"70016720","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Assessment of fracture-sampling techniques for laboratory tests on core","docAbstract":"As part of the site characterization work to be done at Yucca Mountain in Nye County, Nevada, a candidate site for the first mined-geologic repository for high-level nuclear waste, laboratory tests are proposed to evaluate fluid flow in single fractures. Laboratory and onsite tests were conducted to develop methods for collecting rock-core samples containing single fractures for the subsequent laboratory tests. Techniques for collecting rock cores with axial (parallel to the core axis) and radial (perpendicular to the core axis) fractures are discussed.","largerWorkTitle":"High Level Radioactive Waste Management","conferenceTitle":"Proceedings of the 2nd Annual International Conference on High Level Radioactive Waste Management","conferenceDate":"28 April 1991 through 3 May 1991","conferenceLocation":"Las Vegas, NV, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872628310","usgsCitation":"Severson, G., and Boernge, J., 1991, Assessment of fracture-sampling techniques for laboratory tests on core, in High Level Radioactive Waste Management, Las Vegas, NV, USA, 28 April 1991 through 3 May 1991, p. 285-290.","startPage":"285","endPage":"290","numberOfPages":"6","costCenters":[],"links":[{"id":224939,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee31e4b0c8380cd49c02","contributors":{"editors":[{"text":"Anon","contributorId":128316,"corporation":true,"usgs":false,"organization":"Anon","id":536342,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Severson, G.R.","contributorId":43807,"corporation":false,"usgs":true,"family":"Severson","given":"G.R.","email":"","affiliations":[],"preferred":false,"id":374305,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boernge, J.M.","contributorId":51923,"corporation":false,"usgs":true,"family":"Boernge","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":374306,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}