Solute transport with multiple equilibrium-controlled or kinetically controlled chemical reactions
John C. Friedly, Jacob Rubin
1992, Water Resources Research (28) 1935-1953
A new approach is applied to the problem of modeling solute transport accompanied by many chemical reactions. The approach, based on concepts of the concentration space and its stoichiometric subspaces, uses elements of the subspaces as primary dependent variables. It is shown that the resulting model equations are compact in...
Evaluation of the commercial freshwater mussel fishery on Wheeler Reservoir, Alabama. Final report.
Z.H. Bowen, S. P. Malvestuto, J. H. Crance, W. D. Davies
1992, Report
No abstract available....
Discussion of "The modeling process and model validation" by Chin-Fu Tsang
Leonard F. Konikow
1992, Groundwater (30) 622-623
No abstract available....
Annual survival rates of adult and immature eastern population tundra swans
James D. Nichols, J. Bart, Roland J. Limpert, William J.L. Sladen, James E. Hines
1992, Journal of Wildlife Management (56) 485-494
Tundra swans (Cygnus columbianus) of the eastern population were neckbanded in Maryland, North Carolina, and Alaska from 1966 through 1990. These swans were resighted and recaptured during autumn, winter, and spring, 1966-1990. Although the original motivation for this study involved swan movements, we wanted to use the resulting data to...
Fat fractal scaling of drainage networks from a random spatial network model
Michael R. Karlinger, Brent M. Troutman
1992, Water Resources Research (28) 1975-1981
An alternative quantification of the scaling properties of river channel networks is explored using a spatial network model. Whereas scaling descriptions of drainage networks previously have been presented using a fractal analysis primarily of the channel lengths, we illustrate the scaling of the surface area of the channels defining the...
Larval American shad: Effects of age and group size on swimming and feeding behavior
R. M. Ross, T. W. H. Backman
1992, Transactions of the American Fisheries Society (121) 508-516
We analyzed the behavior of 3–4‐d‐old prolarval and 28–33‐d‐old metalarval American shad Alosa sapidissima in groups of 3–1,000 fish per 22‐L glass tank, to determine whether (1) previously described juvenile behavior patterns first develop in larvae, (2) group size or density alters the behavior of larvae, and (3) schooling or other forms...
Band reporting rates of mallards in the Mississippi alluvial valley
Kenneth J. Reinecke, Charles W. Shaiffer, Don Delnicki
1992, Journal of Wildlife Management (56) 526-531
We captured 2,182 mallards (Anas platyrhynchos) in eastcentral Arkansas and marked 730 with standard bands, 728 with 10 reward bands, and 724 with 'dummy' radio transmitters during November 1986-89 to estimate band reporting rates in the Mississippi Alluvial Valley (MAV). Assuming all transmitters were reported, reporting rates were 0.16 (SE=0.049)...
Feeding flights of breeding double-crested cormorants at two Wisconsin colonies
T. W. Custer, C. Bunck
1992, Journal of Field Ornithology (63) 203-211
Unmarked Double-crested Cormorants (Phalacrocorax auritus) (n = 523) were followed by airplane from Cat Island and Spider Island, two nesting colonies in Wisconsin, to their first landing site. Cormorants flew an average of 2.0 km from Cat Island (maximum 40 km) and 2.4 km from Spider Island (maximum12 km)....
Small earthquakes, tectonic forces
Thomas C. Hanks
1992, Science (256) 1430-1432
Earthquake scaling and frequency-of-occurrence relations require that small earthquakes be just as important as larger ones in redistributing the forces that drive relative displacements across active faults of any dimension, including plate boundaries....
Microcrack interaction leading to shear fracture
David A. Lockner, Diane E. Moore, Ze’ev Reches
1992, Conference Paper, 33rd U.S. Symposium on Rock Mechanics
In this paper we draw upon recent laboratory results concerning the nucleation and growth of shear fractures in brittle rock. In homogeneous, crystalline rock such as granite, fault nucleation occurs rapidly and with only subtle changes in precursory microcrack patterns. Once nucleated, the fault grows rapidly, restricting microcrack damage to...
A key phase in the recruitment dynamics of coral reef fishes: post-settlement transition
L. Kaufman, J. L. Ebersole, Jim Beets, Carole McIvor
1992, Environmental Biology of Fishes (34) 109-118
Recent studies of recruitment dynamics in demersal fishes have placed major emphasis on presettlement mortality, and little on events bridging late larval and early juvenile periods. Observations on 68 taxa of Caribbean coral reef fishes before and during settlement revealed the existence of a distinct post-settlement life phase called the...
Ruby Mountains metamorphic core complex: deep crustal exposures exhumed from beneath the Pinon Range?
Keith A. Howard
James Hugh Trexler, Ted Flanigan, Donna Flanigan, M.W. Hansen, Larry Garside, editor(s)
1992, Book chapter, Structural geology and petroleum potential of southwest Elko County, Nevada: the guidebook to the Nevada Petroleum Society annual field trip, June 1992
Global hypocenter data base
Water Resources Division, U.S. Geological Survey
1992, Report
No abstract available....
Evaluating wilderness recreational opportunities: application of an impact matrix
Thomas J. Stohlgren, David J. Parsons
1992, Environmental Management (16) 397-403
An inventory of the severity and spatial distribution of wilderness campsite impacts in Sequoia and Kings Canyon National Parks identified a total of 273 distinct nodes of campsites or “management areas.” A campsite impact matrix was developed to evaluate management areas based on total impacts (correlated to the total area...
Effect of membrane filtration artifacts on dissolved trace element concentrations
Arthur J. Horowitz, Kent A. Elrick, Mark R. Colberg
1992, Water Research (26) 753-763
Among environment scientists, the current and almost universally accepted definition of dissolved constituents is an operational one-only those materials which pass through a 0.45-μm membrane filter are considered to be dissolved. Detailed laboratory and field studies on Fe and Al indicate that a number of factors associated...
Associations between benthic flora and diel changes in dissolved arsenic, phosphorus, and related physico-chemical parameters
James S. Kuwabara
1992, Freshwater Science (11) 218-222
Diel relationships between physical and chemical parameters and biomass were examined along a 57-km reach of Whitewood Creek, South Dakota, between 29 August and 2 September 1988. A time lag of ∼3-6 h for fluctuations in soluble reactive phosphorus (SRP) concentrations (ranging from 0.1 to 0.5 μM at the downstream...
Reply to Dr. Stoesselfs comment on “Reaction paths and equilibrium end-points in solid-solution aqueous-solution systems”
Pierre D. Glynn, Eric J. Reardon, Niel Plummer, Eurybiades Busenberg
1992, Geochimica et Cosmochimica Acta (56) 2559-2572
In reply to the Critical Comment of R. K. Stoessell (this issue), limiting activity coefficients of bromide in halite (γNaBr) have been calculated by least-squares fitting of Simons et al.'s (1952) bromide distribution coefficient data for the Na(Cl,Br)-NaOH-H2O system at 35°C. Regular and subregular solidsolution model fits give γNaBr...
Solute transport with multisegment, equilibrium-controlled, classical reactions: Problem solvability and feed forward method's applicability for complex segments of at most binary participants
Jacob Rubin
1992, Water Resources Research (28) 1681-1702
The feed forward (FF) method derives efficient operational equations for simulating transport of reacting solutes. It has been shown to be applicable in the presence of networks with any number of homogeneous and/or heterogeneous, classical reaction segments that consist of three, at most binary participants. Using a sequential (network type...
Fate of alkylbenzenesulfonates and dialkyltetralinsulfonates in sewage contaminated ground water
Jennifer A. Field, Larry B. Barber, E. Michael Thurman, Billy L. Moore, David L. Lawrence, David A. Peake
1992, Environmental Science & Technology (26) 1140-1148
No abstract available....
A solute flux approach to transport in heterogeneous formations: 2. Uncertainty analysis
Allen M. Shapiro, V.D. Cvetkovic
1992, Water Resources Research (28) 1377-1388
Uncertainty in the mass flux for advection dominated solute movement in heterogeneous porous media is investigated using the Lagrangian framework developed in paper 1 by Dagan et al. (this issue). Expressions for the covariance of the mass flux and cumulative mass flux are derived as functions of the injection volume...
A solute flux approach to transport in heterogeneous formations: 1. The general framework
V.D. Cvetkovic, Allen M. Shapiro
1992, Water Resources Research (28) 1369-1376
It is common to represent solute tranport in heterogeneous formations in terms of the resident concentration C (x, t), regarded as a random space function. The present study investigates the alternative representation by q , the solute mass flux at a point of a control plane normal to the mean flow. This representation is...
Geology and saline resources of Danby Playa, southeastern California
J.P. Calzia
1992, Book chapter, Old routes to the Colorado
No abstract available ...
Three's a crowd in California
Andrew J. Michael
1992, Nature (357) 111-112
No abstract available....
Consumption of atmospheric methane by desert soils
Robert G. Striegl, T.A. McConnaughey, D.C. Thorstenson, E.P. Weeks, J.C. Woodward
1992, Nature (357) 145-147
Atmospheric concentrations of methane, a greenhouse gas, are increasing at a rate of about 1% yr-1 (refs 1–4). Oxidation by methylotrophic bacteria in soil is the largest terrestrial sink for atmospheric CH4, and is estimated to consume about 30 x 1012 g CH4 yr-1 (refs 4–6). Spatial and temporal variability in the rate of...
Preface
John R. Dyni
1992, Fuel (71) 1347-1348
No abstract available....
