Preliminary delineation of contaminated water-bearing fractures intersected by open-hole bedrock wells
John H. Williams, Randall W. Conger
1990, Groundwater Monitoring & Remediation (10) 118-126
Contaminated water‐bearing fractures intersected by open‐hole bedrock wells were preliminarily delineated through a combination of geophysical logging, vertical‐flow measurements, and downhole water sampling as part of remedial site investigations in southeastern New York. The wells investigated range from 100 to 450 feet in depth, have only shallow surface casing, and...
Landslides caused by the intense precipitation of Hurricane Hugo in El Yunque and surrounding areas
Matthew C. Larsen
1990, Report, Boletin Oficial de la Sociedad de Historia Natural de Puerto Rico
No abstract available....
Field methods for measurement of ground water redox chemical parameters
Katherine Walton-Day, Donald L. Macalady, Myron H. Brooks, Vernon T. Tate
1990, Groundwater Monitoring & Remediation (10) 81-89
An inexpensive, versatile, and portable system is presented, which facilitates rapid field determinations of redox potentials, pH, conductivity, ferrous and total iron, nitrite, specific conductance, dissolved oxygen, and temperature. Accuracy is facilitated by on‐site measurements of most parameters using specially constructed flow‐through cells and, for several...
The Ag-Mn-Pb-Zn vein, replacement, and skarn deposits of Uchucchacua, Peru; studies of structure, mineralogy, metal zoning, Sr isotopes, and fluid inclusions
M. Andrew Bussell
1990, Economic Geology (85) 1348-1383
Uchucchacua is an Ag-Mn-Pb-Zn vein, replacement, and skarn mineral district in the central Andes of Peru. Host rocks are massive Jumasha Formation shelf limestones of Turonian age that have been folded into an asymmetric northeast-verging anticline of Andean trend. Strata near the fold crest are cut by minor dacitic intrusions...
Influence of exchange flow between the channel and hyporheic zone on nitrate production in a small mountain stream
Frank J. Triska, John H. Duff, Ronald J. Avanzino
1990, Canadian Journal of Fisheries and Aquatic Sciences (47) 2099-2111
Variation in local exchange of flows between the channel and hyporheic zone produced temporally shifting concentration gradients of dissolved oxygen, nitrate, and ammonium in subsurface waters of a small, gravel-cobble bed stream. Channel water advected laterally supplied dissolved oxygen, and groundwater supplied ammonium to support hyporheic nitrification. Nitrate production was...
Simulation of lake evaporation with application to modeling lake level variations of Harney‐Malheur Lake, Oregon
Steven W. Hostetler, Patrick J Bartlein
1990, Water Resources Research (26) 2603-2612
A physically based eddy diffusion model for simulating the seasonal variation in lake temperature and evaporation is presented and validated. Because no lake‐specific fitting of the parameters of the model is necessary, the model can be used to simulate evaporation in studies of climate change and lake...
Water movement through an experimental soil liner
I.G. Krapac, K. Cartwright, S.V. Panno, B.R. Hensel, K.R. Rehfeldt, B.L. Herzog
1990, Waste Management and Research (9) 195-204
A field-scale soil liner was constructed to test whether compacted soil barriers in cover and liner systems could be built to meet the U.S. EPA saturated hydraulic conductivity requirement (⩽ 1 × 10−7 cm s−1). The 8 × 15 × 0.9 m liner was constructed in 15 cm compacted lifts using...
Paleontological analysis of a lacustrine carbonaceous uranium deposit at the Anderson mine, Date Creek basin, west-central Arizona (U.S.A.)
J. K. Otton, J.P. Bradbury, R. M. Forester, J.H. Hanley
1990, Ore Geology Reviews (5) 541-552
The Tertiary sedimentary sequence of the Date Creek basin area of Arizona is composed principally of intertonguing alluvial-fan and lacustrine deposits. The lacustrine rocks contain large intermediate- to, locally, high-grade uranium deposits that form one of the largest uranium resources in the United States (an estimated 670,000 tons of U3O8 at...
Opportunities to protect instream flows and wetland uses of water in Florida
Nina Burkardt
1990, Report
This document combines the efforts of several individuals, agencies, and organizations toward a common objective: the identification, description, and preliminary evaluation of promising opportunities for protecting instream uses of water under existing laws in Florida. this report is intended for the use of State and Federal planning and management personnel who...
A sensitivity analysis of nine diversity and seven similarity indices
Terrence P. Boyle, Gary M. Smillie, Jana C. Anderson, David R. Beeson
1990, Research Journal of the Water Pollution Control Federation (62) 749-762
Indices summarizing community structure are used to evaluate fundamental community ecology, species interaction, biogeographical factors, and environmental stress. Some of these indices are insensitive to gross community changes induced by contaminants of pollution. Sixteen indices commonly used to assess the status of aquatic communities in water quality studies were evaluated...
Stoichiometry of mineral reactions from mass balance computations for acid mine waters, Iron Mountain, California
Charles N. Alpers, D. Kirk Nordstrom
1990, Book chapter, Acid-mine drainage : Designing for closure
No abstract available....
Effects of winter undernutrition on body composition and physiological profiles of white-tailed deer
Glenn D. DelGiudice, L. David Mech, Ulysses S. Seal
1990, Journal of Wildlife Management (54) 539-550
We examined the effects of undernutrition and recovery on body composition and blood and urinary profiles of 6 captive white-tailed deer (Odocoileus virginianus) between 18 December 1984 and 3 May 1985. Deer were weighed, and blood and urine were collected every 2 weeks from 10 January to 3 May. At...
Photosynthetic pathways in freshwater aquatic plants
Jon E. Keeley
1990, Trends in Ecology and Evolution (5) 330-333
Recent studies show that generalizations about photosynthetic pathways, derived from terrestrial plant studies, do not apply to aquatic plants. Crassulacean acid metabolism (CAM) photosynthesis is of selective value not only in arid environments, where it enhances water-use efficiency, but also in aquatic plants of oligotrophic waters, where it enhances competitive...
In situ retention-transport response to nitrate loading and storm discharge in a third-order stream
Frank J. Triska, Vance C. Kennedy, Ronald J. Avanzino, Gary W. Zellweger, Kenneth E. Bencala
1990, Journal of the North American Benthological Society (9) 229-239
Nitrate retention was assayed in a 264-m reach of a third-order stream, Little Lost Man Creek, Humboldt County, California, USA. Nitrate budgets (24-48 hours) were calculated under background conditions, and during four other intervals of modified nitrate concentration caused by nutrient amendment or storm-enhanced discharge. Under background, low-flow conditions, the...
Guidelines for the collection, treatment, and analysis of water samples: U.S. Geological Survey Western Region field manual
Marc A. Sylvester, Lester R. Kister, W. B. Garrett
1990, Report
No abstract available....
Selenium and other elements in juvenile striped bass from the San Joaquin Valley and San Francisco Estuary, California
Michael K. Saiki, Donald U. Palawski
1990, Archives of Environmental Contamination and Toxicology (19) 717-730
Concentrations of selenium and other trace elements were determined in 55 whole body samples of juvenile anadromous striped bass (Morone saxatilis) from the San Joaquin Valley and San Francisco Estuary, California. The fish (≤1 yr old—the predominant life stage in the San Joaquin Valley) were collected in September–December...
Variations in suspended sediment and associated trace element concentrations in selected riverine cross sections
Arthur J. Horowitz, Frank A. Rinella, Paul J. Lamothe, Timothy L. Miller, Thomas K. Edwards, Richard L. Roche, David A. Rickert
1990, Environmental Science and Technology (24) 1313-1320
Detailed sampling and subsequent analyses of riverine suspended sediment obtained from six rivers in the United States indicate substantial differences in suspended sediment concentrations and possibly in some associated trace elements, depending on whether depth- and width-integrated, point, or pumping samples are used. In addition, the data from time-series, depth-integrated...
Solute transport with multisegment, equilibrium-controlled reactions: A feed forward simulation method
Jacob Rubin
1990, Water Resources Research (26) 2029-2055
The feed forward method (FF method) is one of the ways of formulating operational equations which simulate transport of solutes influenced by equilibrium-controlled reaction networks. The FF method provides increased solution efficiency by adapting its formulations to some of the network's fundamental features. In this study the FF method is...
Factors influencing mercury concentrations in walleyes in northern Wisconsin lakes
J.G. Wiener, R.E. Martini, T.B. Sheffy, G.E. Glass
1990, Transactions of the American Fisheries Society (119) 862-870
We examined relations between mercury concentrations in walleyes Stizostedion vitreum and the characteristics ofclear‐water Wisconsin lakes, which spanned a broad range of pH values (5.0–8.1) and acid‐neutralizing capacities (–9 to 1,017 μeq/L). Total concentrations of mercury in axial muscle tissue of walleyes (total length, 25–56 cm) varied from 0.12...
Use of tree-ring chemistry to document historical ground-water contamination events
Don A. Vroblesky, Thomas M. Yanosky
1990, Groundwater (28) 677-684
The annual growth rings of tulip trees (Liriodendron tulipifera L.) appear to preserve a chemical record of ground-water contamination at a landfill in Maryland. Zones of elevated iron and chlorine concentrations in growth rings from trees immediately downgradient from the landfill are closely correlated temporally with activities in the landfill...
Flume experiments on the alignment of transverse, oblique, and longitudinal dunes in directionally varying flows
David M. Rubin, Hiroshi Ikeda
1990, Sedimentology (37) 673-684
For more than a century geologists have wondered why some bedforms are orientated roughly transverse to flow, whereas others are parallel or oblique to flow. This problem of bedform alignment was studied experimentally using subaqueous dunes on a 3–6-m-diameter sand-covered turntable on the floor of a 4-m-wide flume.In each experiment,...
Human impacts on bear habitat use
David J. Mattson
1990, Bears: Their Biology and Management (8) 33-56
: Human effects on bear habitat use are mediated through food biomass changes, bear tolerance of humans and their impacts, and human tolerance of bears. Large-scale changes in bear food biomass have been caused by conversion of wildlands and waterways to intensive human use, and by the introduction of exotic...
Regional water quality
Janet Hren, Carolyn J. Oblinger Childress, J. Michael Norris, Thomas H. Chaney, Donna N. Myers
1990, Environmental Science and Technology (24) 1122-1127
No abstract available....
Water-vapor pressure in nests of the San Miguel Island Song Sparrow
Michael D. Kern, Mark K. Sogge, Charles van Riper III
1990, The Condor (92) 761-767
The water-vapor pressure (PN) in nests of the San Miguel Island race of Song Sparrows (Melospiza melodia micronyx) averaged 16 torr, but varied considerable between nests and within individual nests during successive days of incubation. Large daily fluctuations occurred throughout the incubation period and did not parallel concurrent changes...
Development of an aquifer management model AQMAN3D
Juan Carlos Puig, L. I. Rolon-Collazo, Ishmael Pagan-Trinidad
J.H. Krishna, Vicente Quinones-Aponte, Fernando Gomez-Gomez, G.L. Morris, editor(s)
1990, Conference Paper, Tropical hydrology and Caribbean water resources : proceedings of the International Symposium on Tropical Hydrology and Fourth Caribbean Islands Water Resources Congress
A computer code that enables the use of the USGS Modular groundwater flow model for aquifermanagement modeling has been developed. Aquifermanagement techniques integrate groundwater flow modeling with linear quadratic optimization methods for the solution of various aquifer management problems. The model AQMAN3D, is a modified version of a previously developed two-dimensional AQMAN <span...
