Sorption of chlorobenzenes to cape cod aquifer sediments
L.B. Barber II
1994, Environmental Science & Technology (28) 890-897
Sorption of tetra- and pentachlorobenzene by sediment from a glacial outwash aquifer on Cape Cod, MA, was evaluated. Particle size and mineralogical fractions (separated based on paramagnetic susceptibility) were characterized with respect to sediment organic carbon (SOC), mineralogy, surface area, metal oxide coatings, and spatial variability. SOC increases by a...
Relation between largest known flood discharge and elevation in Montana
Charles Parrett, Stephen R. Holnbeck
1994, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Previous studies relating unit discharge to elevation indicated that large floods in the Rocky Mountains may be limited by elevation. However, high-elevation data are sparse in Montana and the indications may not be entirely correct. Based on data at 19 sites in Montana, a strong log-linear relation exists between large-flood...
Effects of polar and nonpolar groups on the solubility of organic compounds in soil organic matter
C. T. Chiou, D. E. Kile
1994, Environmental Science & Technology (28) 1139-1144
Vapor sorption capacities on a high-organic-content peat, a model for soil organic matter (SOM), were determined at room temperature for the following liquids: n-hexane, 1,4-dioxane, nitroethane, acetone, acetonitrile, 1-propanol, ethanol, and methanol. The linear organic vapor sorption is in keeping with the dominance of vapor partition in peat SOM. These...
Evaluation of the method of collecting suspended sediment from large rivers by discharge-weighted pumping and separation by continuous- flow centrifugation
J. A. Moody, R.H. Meade
1994, Hydrological Processes (8) 513-530
A method for collecting suspended sediment samples has been developed that pumps a discharge-weighted volume of water from fixed depths at four to 40 locations across a river and separates the suspended sediment in the sample using a continuous-flow centrifuge. The efficacy of the method is evaluated by comparing the...
Measurement of saturated hydraulic conductivity in fine-grained glacial tills in Iowa: Comparison of in situ and laboratory methods
D. Roger Bruner, Alan J. Lutenegger
1994, Conference Paper, ASTM Special Technical Publication
Nested-standpipe and vibrating-wire piezometers were installed in Pre-Illinoian Wolf Creek and Albernett formations at the Eastern Iowa Till Hydrology Site located in Linn County, Iowa. These surficial deposits are composed of fine-grained glacial diamicton (till) with occasional discontinuous lenses of sand and silt. They overlie the Silurian (dolomite) aquifer which...
Model for dolomite formation in northwest Florida
C.R. Cooper, J.A. Tindall
1994, Journal of Hydrology (157) 367-391
Petrographic methods are used to examine the nature of the Floridan post-Oligocene unconformity and diagenetic responses in the associated carbonate units. The study addresses the depositional environment and the character of sediments associated with the unconformity, types and timing of diagenetic changes, and mode of dolomitization for the Suwannee Limestone...
Uranium-Series Ages of Travertines and Timing of the Last Glaciation in the Northern Yellowstone Area, Wyoming-Montana
N.C. Sturchio, K. L. Pierce, M.T. Murrell, M.L. Sorey
1994, Quaternary Research (41) 265-277
Uranium-series age determinations by mass spectrometric methods were done for travertines and associated carbonate veins related to clastic deposits of the last glaciation (Pinedale) in the northern Yellowstone area. Dramatic variations in the hydrologic head are inferred from variations in the elevation of travertine deposition with time and are consistent...
Hydrogeologic analysis of the saturated-zone ground-water system, under Yucca Mountain, Nevada
C. J. Fridrich, W.W. Dudley Jr., J. S. Stuckless
1994, Journal of Hydrology (154) 133-168
The configuration of the southward-sloping water table under Yucca Mountain is dominated by an abrupt decline of 300 m over a distance of less than 2 km. This northeast-striking zone of large...
Distribution and transport of selected anthropogenic organic compounds on Mississippi River suspended sediment (U.S.A.), May/June 1988
C.E. Rostad, W. E. Pereira, T.J. Leiker
1994, Journal of Contaminant Hydrology (16) 175-199
The distribution and transport of selected hydrophobic halogenated organic compounds on suspended sediment from the lower Mississippi River were determined using discharge-weighted sampling with concurrent discharge measurements. Trends in compound concentration from upstream to downstream and the effects of selected tributaries were determined. The compounds identified on the suspended sediment...
The use of slug tests to describe vertical variations in hydraulic conductivity
J.J. Butler Jr., Geoffrey C. Bohling, Z. Hyder, C.D. McElwee
1994, Journal of Hydrology (156) 137-162
Multilevel slug tests provide one means of obtaining estimates of hydraulic conductivity on a scale of relevance for contaminant transport investigations. A numerical model is employed here to assess the potential of multilevel slug tests to provide information about vertical variations...
The feasibility of recharge rate determinations using the steady-state centrifuge method
J. R. Nimmo, David A. Stonestrom, K.C. Akstin
1994, Soil Science Society of America Journal (58) 49-56
The establishment of steady unsaturated flow in a centrifuge permits accurate measurement of small values of hydraulic conductivity (K). This method can provide a recharge determination if it is applied to an unsaturated core sample from a depth at which gravity alone drives the flow. A K value determined at the in...
Ionic strength and DOC determinations from various freshwater sources to the San Francisco Bay
Y.R. Hunter, J.S. Kuwabara
1994, Bulletin of Environmental Contamination and Toxicology (52) 311-318
An exact estimation of dissolved organic carbon (DOC) within the salinity gradient of zinc and copper metals is significant in understanding the limit to which DOC could influence metal speciation. A low-temperature persulfate/oxygen/ultraviolet wet oxidation procedure was utilized for analyzing DOC samples adapted for ionic strength from major freshwater sources...
A pore-pressure diffusion model for estimating landslide-inducing rainfall
M.E. Reid
1994, Journal of Geology (102) 709-717
Many types of landslide movement are induced by large rainstorms, and empirical rainfall intensity/duration thresholds for initiating movement have been determined for various parts of the world. In this paper, I present a simple pressure diffusion model that provides a physically based...
Hydrologic features of the Truckee and Carson River Basins and adjacent areas, western Nevada and eastern California
Jeffrey V. Trionfante, Lorri A. Peltz
1994, Open-File Report 93-368
No abstract available....
Hydraulic properties of a fractured-rock aquifer, Lee Valley, San Diego County, California
Charles A. Kaehler, Paul A. Hsieh
1994, Water Supply Paper 2394
No abstract available....
National Water-Quality Assessment Program--Southern High Plains, Texas and New Mexico
Dennis G. Woodward, Cecilia G. Diniz
1994, Open-File Report 94-71
BACKGROUND In 1991, the U.S. Geological Survey (USGS) began a National Water-Quality Assessment (NAWQA) program. The long-term goals of the NAWQA program are to describe the status of, and trends in, the quality of a large, representative part of the Nation's surface- and ground-water resources and to identify the major natural...
Herbicides and nitrate in near-surface aquifers in the midcontinental United States, 1991
Dana W. Kolpin, Michael R. Burkart, E. Michael Thurman
1994, Water Supply Paper 2413
The occurrence and distribution of selected herbicides, atrazine metabolites, and nitrate were determined for near-surface aquifers (within 50 feet of land surface) in the corn- and soybean-producing region of the midcontinental United States. The study region included all or parts of Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North...
Organic compounds downstream from a treated-wastewater discharge near Dallas, Texas, March 1987
P.M. Buszka, L.B. Barber II, M.P. Schroeder, L.D. Becker
1994, Water-Resources Investigations Report 93-4194
Water and streambed-sediment samples were collected on March 9 and 10,1987 from one site upstream and three sites downstream of the discharge from a municipal wastewater-treatment plant on Rowlett Creek near Dallas, Texas. To extract and separate organic compounds, purgeand-trap, closed-loop stripping, and pH-adjusted solvent extraction methods were used for...
Major ions, nutrients, and trace elements in the Mississippi River near Thebes, Illinois, July through September 1993
Howard E. Taylor, Ronald C. Antweiler, Terry I. Brinton, David A. Roth, John A. Moody
1994, Circular 1120-D
Extensive flooding in the upper Mississippi River Basin during summer 1993 had a significant effect on the water quality of the Mississippi River. To evaluate the change in temporal distribution and transport of dissolved constituents in the Mississippi River, six water samples were collected by a discharge-weighted method from July...
National Water-Quality Assessment (NAWQA) Program, Long Island-New Jersey (LINJ) Coastal Drainages Study Unit : Scope of the Long Island-New Jersey Coastal Drainages Study-Unit investigation
Mark A. Ayers
1994, Fact Sheet 030-94
Scope of the Long Island-New Jersey Coastal Drainages Study-Unit InvestigationIn 1991, the U.S. Geological Survey (USGS) began a National Water-Quality Assessment (NAWQA) Program to document the status of and trends in quality of a large representative part of the Nation's water resources and to provide a sound scientific understanding of...
Ground-water resources of southern Tangipahoa Parish and adjacent areas, Louisiana
T.R. Rapp
1994, Water-Resources Investigations Report 92-4182
Groundwater resources in southern Tangipahoa Parish and adjacent areas were studied to determine their potential for development as an alternative to the Mississippi River as a water-supply source for Jefferson Parish. Eight major aquifers consisting of thick sand units that underlie the study area are, in descending order: (1) shallow,...
Regional Aquifer-System Analysis Program of the U.S. Geological Survey, 1978-1992
Ren Jen Sun, Richard H. Johnston
1994, Circular 1099
The major ground-water systems of the United States have been investigated by the U.S. Geological Survey (USGS) through its Regional Aquifer-System Analysis (RASA) Program. During the first 15 years of the program (1978-92), 25 regional aquifer systems, including the most heavily pumped aquifers in the Nation, were intensively studied. As...
Rainfall, evapotranspiration, total soil-water potential, and soil-water content at a sagebrush site and a replacement-vegetation site near Fort Defiance, Arizona, 1989-91
C. L. Thomas
1994, Open-File Report 94-43
The Navajo Nation Forestry Department established a growth of four species of native grasses and two species of native shrubs on formerly sagebrush- covered land about 6 miles north of Fort Defiance, Arizona. The native grasses and shrubs grew under conditions of natural precipitation and soil fertility. This provided alternate...
Nonpoint and Point Sources of Nitrogen in Major Watersheds of the United States
Larry J. Puckett
1994, Water-Resources Investigations Report 94-4001
Estimates of nonpoint and point sources of nitrogen were made for 107 watersheds located in the U.S. Geological Survey's National Water-Quality Assessment Program study units throughout the conterminous United States. The proportions of nitrogen originating from fertilizer, manure, atmospheric deposition, sewage, and industrial sources were found to vary with climate,...
South Cascade Glacier, Washington; hydrologic and meteorological data, 1957-67
M.E. Sullivan
1994, Open-File Report 94-77
Historic hydrologic and meteorological data are compiled for South Cascade Glacier, Washington, USA, a site selected by the U.S. Geological Survey for long-term study of the response of a glacier to climate change and its effect on water resources. The data consist of stream discharge and meteorological data, including precipitation,...
