Geothermal resources of the western arm of the Black Rock Desert, northwestern Nevada: Part II, aqueous geochemistry and hydrology
A. H. Welch, A. M. Preissler
1990, Water-Resources Investigations Report 87-4062
The western arm of the Black Rock Desert, Nevada, includes several distinct hydrothermal systems, some of which exceed 150 C and may exceed 200 C at depth, determined on the basis of chemical geothermometry. The cation composition of the thermal water appears to be controlled by aluminosilicate minerals that are...
Potentiometric surface of the alluvial aquifer and hydrologic conditions in the Santa Isabel-Juana Diaz area, Puerto Rico, March to April, 1987
Felix Rodriguez-del-Rio, Fernando Gómez-Gómez
1990, Water-Resources Investigations Report 89-4116
No abstract available. ...
Laboratory simulation of the effects of overburden stress on the specific storage of shallow artesian aquifers
Nicasio Sepulveda, A. L. Zack
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
A laboratory experiment to measure the specific storage of an aquifer material was conducted. A known dead load, simulating an overburden load, was applied to a sample of completely saturated aquifer material contained inside a cylinder. After the dead load was applied, water was withdrawn from the sample, causing the...
Influence of seasonal growth, age, and environmental exposure on Cu and Ag in a bivalve indicator, Macoma balthica, in San Francisco Bay
Daniel J. Cain, Samuel N. Luoma
1990, Marine Ecology Progress Series (60) 45-55
Temporal and spatial variations in Cu and Ag in the deposit-feeding clam Macoma balthica and in surficial sediments were analysed at 8 stations in San Francisco Bay at near-monthly intervals for periods ranging from 3 to 10 yr during 1977 to 1986. Strong seasonal variations in metal concentrations of M....
Chemical weathering in the Loch Vale Watershed, Rocky Mountain National Park, Colorado
M. Alisa Mast, James I. Drever, Jill Baron
1990, Water Resources Research (26) 2971-2978
Mineralogic, hydrologic, and geochemical data were used to determine the source of solutes to surface waters draining the Loch Vale Watershed (LVWS), an alpine-subalpine drainage located in the Front Range of Colorado. The flux of dissolved solids from LVWS is primarily controlled by interactions between snowmelt and materials derived from...
The chemistry of iron, aluminum, and dissolved organic material in three acidic, metal-enriched, mountain streams, as controlled by watershed and in-stream processes
Diane M. McKnight, Kenneth E. Bencala
1990, Water Resources Research (26) 3087-3100
Several studies were conducted in three acidic, metal-enriched, mountain streams, and the results are discussed together in this paper to provide a synthesis of watershed and in-stream processes controlling Fe, Al, and DOC (dissolved organic carbon) concentrations. One of the streams, the Snake River, is naturally acidic; the other two,...
Discussion of “Gas‐Transfer Measurements Using Headspace Analysis of Propane” by John R. Thene and John S. Gulliver (November/December, 1990, Vol. 116, No. 6)
Ronald E. Rathbun
1990, Journal of Environmental Engineering (118) 454-456
No abstract available....
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...
Comment on "Temperature dependence of the aqueous solubilities of highly chlorinated dibenzo-p-dioxins"
Cary T. Chiou, Milton Manes
1990, Environmental Science & Technology (24) 1755-1756
No abstract available....
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...
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....
Overview of the effects and influence of the activity of Mount St. Helens in the 1980s
Donald W. Peterson
1990, Geoscience Canada (17) 163-166
The cataclysmic eruption of Mount St. Helens on May 18, 1980, made an enormous impact on the science of volcanology. The eruption was in daylight in clear weather, which provided an unprecedented opportunity to investigate relations among observations, products, and effects of a large explosive eruption. The May 18 events...
Soil-vegetation correlations in the Connecticut River floodplain of Western Massachusetts
Peter Veneman, Ralph W. Tiner
1990, Report
As part of a national study analyzing the relation between hydric soils and wetland vegetation, the vegetation associated with a series of known soils was sampled along the Connecticut River floodplain in Massachusetts. Weighted average and index average (presence/absence) values were calculated for vegetation using wetland ecological index values...
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...
Hazardous wastes from large-scale metal extraction. A case study
Johnnie N. Moore, Samuel N. Luoma
1990, Environmental Science & Technology (24) 1278-1285
No abstract available...
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...
Field trip guide - American Water Resources Association
Matthew C. Larsen, Thalia D. Veve
1990, Conference Paper, International Symposium on Tropical Hydrology and Fourth Caribbean Islands Water Resources Congress
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...
Measurement of in situ rates of selenate removal by dissimilatory bacterial reduction in sediments
Ronald S. Oremland, Nisan A. Steinberg, Ann S. Maest, Laurence G. Miller, James T. Hollibaugh
1990, Environmental Science & Technology (24) 1157-1164
A radioisotope method for measurement of bacteria respiratory reduction of selenate to elemental selenium in aquatic sediments was devised. Sediments were labeled with [75Se]selenate, incubated, and washed, and 75Se0(s) was determined as counts remaining in the sediments. Core profiles of selenate reduction, sulfate reduction, and denitrification were made simultaneously in...
Rainfall-soil moisture relations in landslide-prone areas of a tropical rain forest, Puerto Rico
Matthew C. Larsen, Angel J. Torres-Sanchez
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
Soil moisture conditions are not well documented in steep, tropical landslide-prone terrain. In the 11,330 ha Caribbean National Forest (CNF) in northeastern Puerto Rico more than 170 landslides that occurred from one to approximately 60 years ago have been mapped. Most of these landslides are shallow, with failure depths of...
Hydrochemistry of the South Coastal Plain Aquifer System of Puerto Rico and its relation to surface-water recharge
Fernando Gomez-Gomez
Fernando Gomez-Gomez, Vicente Quinones-Aponte, A.I. Johnson, editor(s)
1990, Conference Paper, Proceedings of the International Symposium on Tropical Hydrology
Using 222Rn to examine groundwater/surface discharge interaction in the Rio Grande de Manati, Puerto Rico
K. Kelly Ellins, A. Roman-Mas, A. Lee
1990, Journal of Hydrology (115) 319-341
222Rn was used in the karst drainage basin of the Rio Grande de Manati in Puerto Rico to study groundwater/surface flow relationships. Locations of groundwater influx along two sections of the Rio Grande de Manati were identified. The 222Rn measurements were used together with stream discharge data in a mass balance...
Application of the Stefan-Maxwell Equations to determine limitations of Fick's law when modeling organic vapor transport in sand columns
Arthur L. Baehr, Clifford J. Bruell
1990, Water Resources Research (26) 1155-1163
The organic component of the vapor phase of a porous medium contaminated by an immiscible organic liquid can be significant enough to violate the condition of a dilute species diffusing in a bulk phase assumed by Fick's law. The Stefan-Maxwell equations provide a more comprehensive model for quantifying steady state...
A method for testing whether model predictions fall within a prescribed factor of true values, with an application to pesticide leaching
Rudolph S. Parrish, Charles N. Smith
1990, Ecological Modelling (51) 59-72
A quantitative method is described for testing whether model predictions fall within a specified factor of true values. The technique is based on classical theory for confidence regions on unknown population parameters and can be related to hypothesis testing in both univariate and multivariate situations. A capability index is defined...
The quantification of instream flow rights to water
Robert T. Milhous
1990, Book, Proceedings of the American Geophysical Union, Tenth Annual Hydrology Days
Energy development of all types continues to grow in the Rocky Mountain Region of the western United States. Federal resource managers increasingly need to balance energy demands, their effects on the natural and human landscape, and public perceptions towards these issues. The Western Energy Citation Clearinghouse (WECC v.1.0), part of...
