Identification of hydraulic conductivity structure in sand and gravel aquifers: Cape Cod data set
J.R. Eggleston, S.A. Rojstaczer, J.J. Peirce
1996, Water Resources Research (32) 1209-1222
This study evaluates commonly used geostatistical methods to assess reproduction of hydraulic conductivity (K) structure and sensitivity under limiting amounts of data. Extensive conductivity measurements from the Cape Cod sand and gravel aquifer are used to evaluate two geostatistical estimation methods, conditional mean as an estimate and ordinary kriging, and...
Summary of the Snake River plain Regional Aquifer-System Analysis in Idaho and eastern Oregon
G. F. Lindholm
1996, Professional Paper 1408-A
Regional aquifers underlying the 15,600-square-mile Snake River Plain in southern Idaho and eastern Oregon was studied as part of the U.S. Geological Survey's Regional Aquifer-System Analysis program. The largest and most productive aquifers in the Snake River Plain are composed of Quaternary basalt of the Snake River Group, which underlies...
Glutathione conjugation and contaminant transformation
Jennifer A. Field, E.M. Thurman
1996, Environmental Science & Technology (30) 1413-1418
The recent identification of a novel sulfonated metabolite of alachlor in groundwater and metolachlor in soil is likely the result of glutathione conjugation. Glutathione conjugation is an important biochemical reaction that leads, in the case of alachlor, to the formation of a rather difficult to detect, water-soluble, and therefore highly...
Use of ground-penetrating radar and continuous seismic-reflection profiling on surface-water bodies in environmental and engineering studies
F.P. Haeni
1996, Journal of Environmental & Engineering Geophysics (1) 27-35
Ground‐penetrating radar (GPR) and continuous seismic‐reflection profiling (CSP) on shallow rivers, lakes, and ponds are efficient and economical ways of obtaining subsurface hydrologic and geologic information for environmental and engineering studies. These methods are similar in that they produce continuous subsurface profiles, are easy to use in some applications, and...
Fluid inclusions and biomarkers in the Upper Mississippi Valley zinc-lead district; implications for the fluid-flow and thermal history of the Illinois Basin
E. Lanier Rowan, Martin B. Goldhaber
1996, Bulletin 2094-F
The Upper Mississippi Valley zinc-lead district is hosted by Ordovician carbonate rocks at the northern margin of the Illinois Basin. Fluid inclusion temperature measurements on Early Permian sphalerite ore from the district are predominantly between 90?C and I50?C. These temperatures are greater than can be explained by their reconstructed burial...
Vegetation, substrate and hydrology in floating marshes in the Mississippi River Delta Plain wetlands, USA
C.E. Sasser, J. G. Gosselink, E.M. Swenson, C.M. Swarzenski, N.C. Leibowitz
1996, Vegetatio (122) 129-142
In the 1940s extensive floating marshes (locally called ‘flotant’) were reported and mapped in coastal wetlands of the Mississippi River Delta Plain. These floating marshes included large areas of Panicum hemitomon-dominated freshwater marshes, and Spartina patens/Scirpus olneyi brackish marshes. Today these marshes appear to be quite different in extent and...
Solute transport along ground-water flows paths near the Nassau/Suffolk County border, Long Island, New York
P.E. Misut, C. J. Brown
1996, Book, Hydrology and hydrogeology of urban and urbanizing areas: a collection of papers presented at the conference held in Boston, Massachusetts, April 21-24, 1996
Benthic processes in South San Francisco Bay: The role of organic inputs and bioturbation
J.M. Caffrey, Douglas E. Hammond, James S. Kuwabara, L.G. Miller, R.R. Twilley
J.T. Hollibaugh, editor(s)
1996, Book chapter, San Francisco Bay: The ecosystem
No abstract available....
Developing a temporal database of urban development for the Baltimore/Washington region
Janet S. Tilley, William Acevedo, Timothy W. Foresman, Walter Prince
1996, Conference Paper, ASPRS/ACSM Annual Convention and Exhibition, Baltimore, Md., 20–26 April 1996, Proceedings
The U.S. Geological Survey (USGS), the University of Maryland Baltimore County (UMBC), and the U.S. Bureau of the Census are working together as a multiagency, multidisciplinary team in developing a temporal database that documents the growth of the Baltimore-Washington metropolitan region. This database consists of urban development, principal transportation, shoreline,...
Dimethylsulfoniopropionate as a potential methanogenic substrate in Mono Lake sediments
P.T. Visscher, J.R. Guidetti, Charles W. Culbertson, Ronald S. Oremland
1996, Book chapter, Biological and environmental chemistry of DMSP and related sulfonium compounds
A high concentration of dimethylsulfoniopropionate (DMSP) was found in the water column (0.1–1.8 µM particulate plus dissolved) of Mono Lake, CA, an alkaline, hypersaline waterbody. The dense Artemia monica population contained high levels of DMSP (1.7–2.5 mmol.g-1 wet weight), presumably as an osmolyte. Death of these brine shrimp caused accumulation of...
Microbial cycling of methyl bromide
Ronald S. Oremland
M.E. Lidstrom, F.R. Tabita, editor(s)
1996, Book chapter, Microbial growth on C1 compounds
Environmental concern about brominated halocarbons like methyl bromide (MeBr) is focused on their potential to destroy stratospheric ozone. Photocatalysis of MeBr and other halocarbons in the stratosphere results in the liberation of reactive CI and Br atoms. Because Br atoms are perhaps as much as 100-fold more efficient at attacking...
The supply and carbon content of suspended sediment from the Sacramento River to San Francisco Bay: Carbon and nitrogen concentrations and transports
Laurence E. Schemel, S. Hager, D. Childers
J.T. Hollibaugh, editor(s)
1996, Book chapter, San Francisco Bay: The ecosystem
No abstract available....
Investigation of methane production and consumption by use of stable isotopes
Kinga M. Revesz, Tyler B. Coplen, Mary Jo Baedecker, P. D. Glynn, M. F. Hult
1996, Book chapter, Isotopes in water resources management
No abstract available. ...
A history of the Water Resources Division, U.S. Geological Survey; Volume VI, May 1, 1957 to June 30, 1966; the years of change
Hugh H. Hudson, Joseph S. Cragwell Jr.
1996, Report
Luna B. Leopold became chief of the Water Resources Division in May 1957 and stepped down in January 1966 to resume his research'in geomorphology. Ernest L. Hendricks succeeded'Leopold as chief of the Division in May 1966. The dates May 1, 1957, and June 30,1966, bracket a period of profound change in the organization and programs and...
Estimation of rates of aerobic hydrocarbon biodegradation by simulation of gas transport in the unsaturated zone
Matthew A. Lahvis, Arthur L. Baehr
1996, Water Resources Research (32) 2231-2249
The distribution of oxygen and carbon dioxide gases in the unsaturated zone provides a geochemical signature of aerobic hydrocarbon degradation at petroleum product spill sites. The fluxes of these gases are proportional to the rate of aerobic biodegradation and are quantified by calibrating a mathematical transport model to the oxygen...
Effect of snow and firn hydrology on the physical and chemical characteristics of glacial runoff
A. G. Fountain
1996, Hydrological Processes (10) 509-521
Near-surface processes on glaciers, including water flow over bare ice and through seasonal snow and firn, have a significant effect on the speed, volume and chemistry of water flow through the glacier. The transient nature of the seasonal snow profoundly affects the water discharge and chemistry. Water flow through snow...
Characterization of metal adsorption variability in a sand and gravel aquifer, Cape Cod, Massachusetts, U.S.A
C. C. Fuller, J.A. Davis, J.A. Coston, E. Dixon
1996, Journal of Contaminant Hydrology (22) 165-187
Several geochemical properties of an aquifer sediment that control metal-ion adsorption were investigated to determine their potential use as indicators of the spatial variability of metal adsorption. Over the length of a 4.5-m-long core from a sand and gravel aquifer, lead (Pb2+) and zinc (Zn2+) adsorption at constant chemical conditions...
Hydrogeology of the Hawaii Scientific Drilling Project borehole KP-1 1. Hydraulic conditions adjacent to the well bore
Frederick L. Paillet, D. M. Thomas
1996, Journal of Geophysical Research B: Solid Earth (101) 11675-11682
Temperature and formation resistivity logs obtained in borehole KP-1 of the Hawaii Scientific Drilling Project indicate that the adjacent formation is characterized by several zones of distinctly different average temperature and water salinity. A series of hydraulic analyses and water sampling programs were conducted to rule out the possibility of...
Movement of nitrate fertilizer to glacial till and runoff from a claypan soil
D. W. Blevins, D.H. Wilkison, B. P. Kelly, S. R. Silva
1996, Journal of Environmental Quality (25) 584-593
Although water from 20 to 25% of shallow farmstead wells in northern Missouri has concentrations of nitrate (NO3/-) exceeding 10 mg L-1 as nitrogen (N), many potential sources for this NO3/- are usually present. A field experiment was designed to trace and isolate the amount of a single application of...
Flow to a well in a water-table aquifer: An improved laplace transform solution
A.F. Moench
1996, Ground Water (34) 593-604
An alternative Laplace transform solution for the problem, originally solved by Neuman, of constant discharge from a partially penetrating well in a water-table aquifer was obtained. The solution differs from existing solutions in that it is simpler in form and can be numerically inverted without the need for time-consuming numerical...
A catastrophic flood caused by drainage of a caldera lake at Aniakchak Volcano, Alaska, and implications for volcanic hazards assessment
C. F. Waythomas, J. S. Walder, R. G. McGimsey, C.A. Neal
1996, Geological Society of America Bulletin (108) 861-871
Aniakchak caldera, located on the Alaska Peninsula of southwest Alaska, formerly contained a large lake (estimated volume 3.7 × 109 m3) that rapidly drained as a result of failure of the caldera rim sometime after ca. 3400 yr B.P. The peak discharge of the resulting flood was estimated using three methods:...
Effects of glacial meltwater inflows and moat freezing on mixing in an ice-covered antarctic lake as interpreted from stable isotope and tritium distributions
L.G. Miller, G. R. Aiken
1996, Limnology and Oceanography (41) 966-976
Perennially ice-covered lakes in the McMurdo Dry Valleys have risen several meters over the past two decades due to climatic warming and increased glacial meltwater inflow. To elucidate the hydrologic responses to changing climate and the effects on lake mixing processes we measured the stable isotope (??18O and ??D) and...
The influence of landscape position on lake chemical responses to drought in northern Wisconsin
K.E. Webster, T.K. Kratz, C.J. Bowser, J.J. Magnuson, W. J. Rose
1996, Limnology and Oceanography (41) 977-984
Climatic shifts to drier conditions during drought alter the hydrologic pathways of water and solute flow to aquatic ecosystems. We examined differences in drought-induced trends in the semiconservative cations, Ca+Mg, in seven northern Wisconsin lakes. These spanned the range of hydrologic settings in the region, including hydraulically mounded, groundwater flowthrough,...
Analysis of fractures intersecting Kahi Puka Well 1 and its relation to the growth of the island of Hawaii
Roger H. Morin, Frederick L. Paillet
1996, Journal of Geophysical Research B: Solid Earth (101) 11695-11699
As part of the Hawaii Scientific Drilling Project, Kahi Puka Well 1 penetrated about 275 m of Mauna Loa basalts overlying a sequence of Mauna Kea flow units as it was drilled and cored to a total depth of 1053 m below land surface. A borehole televiewer (BHTV) was run...
Hydrologic impact of Great Flood of 1993 in south-central Kansas
M. Sophocleous, A.J. Stern, S.P. Perkins
1996, Journal of Irrigation and Drainage Engineering (122) 203-210
The writers analyze the hydrologic budget and quantify the ground-water recharge impact of the Great Flood of 1993 on the Great Bend Prairie aquifer of south-central Kansas. During the summer of 1993, rainfall totals exceeded normal levels by 200% in the northern portion of the study area, while air temperature...
