Publications
This list of Water Resources Mission Area publications includes both official USGS publications and journal articles authored by our scientists. A searchable database of all USGS publications can be accessed at the USGS Publications Warehouse.
Filter Total Items: 18468
Influence of redox environment and aqueous speciation on metal transport in groundwater: Preliminary results of tracer injection studies
No abstract available.
Authors
J. Davis, Kent D. Becher, B.A. Rea, A.S. Maest, S. P. Garabedian
Modelling within the stream-catchment continuum
No abstract available.
Authors
Kenneth E. Bencala, John H. Duff, Judson W. Harvey, A. P. Jackman, F.J. Triska
Tidal, Residual, Intertidal Mudflat (TRIM) Model and its Applications to San Francisco Bay, California
A numerical model using a semi-implicit finite-difference method for solving the two-dimensional shallow-water equations is presented. The gradient of the water surface elevation in the momentum equations and the velocity divergence in the continuity equation are finite-differenced implicitly, the remaining terms are finite-differenced explicitly. The convective terms are treated using an Eulerian
Authors
R. T. Cheng, V. Casulli, J. W. Gartner
Nitrogen isotopes as indicators of nitrate sources in Minnesota sand-plain aquifers
Nitrate concentrations in excess of national drinking-water standards (10 mg/1 as N) are present in certain sand-plain aquifers in central Minnesota. To investigate nitrate sources in the aquifers, nitrogen-isotope values of nitrate (δ15NNO3No3) were measured in shallow ground water from 51 wells in five land-use settings. The land-use settings and corresponding average nitrate concentrations (as
Authors
Stephen C. Komor, Henry W. Anderson
Solubility-product constant and thermodynamic properties for synthetic otavite, CdCO3(s), and aqueous association constants for the Cd(II)-CO2-H2O system
Considerable disparity exists in the published thermodynamic data for selected species in the Cd(II)-CO2-H2O system near 25°C and 1 atm pressure. Evaluation of published experimental and estimated data for aqueous cadmium-carbonate species suggests an association constant, pK, of −3.0 ± 0.4 for CdCO30, about −1.5 for CdHCO3+, and −6.4 ± 0.1 for Cd(CO3)22− (T = 298.15 K; P = 1 atm; I = 0). Examinat
Authors
S.L.S. Stipp, George A. Parks, D. Kirk Nordstrom, J.O. Leckie
The effects of Hurricane Hugo on suspended-sediment loads, Lago Loiza Basin, Puerto Rico
In the two main tributaries that enter Lago Loiza, Rio Grande de Loiza and Rio Gurabo, 99 600 tonnes of suspended sediment was transported by 58.2??106 m3 of runoff in a 48 h period. The storm-average suspended-sediment concentration in the Rio Grande de Loiza for Hurricane Hugo was 2290 mgl-1, the second lowest for the 12 storms that have been monitored at this site. In Rio Gurabo the storm-avera
Authors
A. Gellis
Assimilation efficiency for sediment-sorbed benzo(a)pyrene by Diporeia spp.
Two methods are currently available for determining contaminant assimilation efficiencies (AE) from ingested material in benthic invertebrates. These methods were compared using the Great Lakes amphipod Diporeia spp. and [14C]benzo(a)pyrene (BaP) sorbed to Florissant sediment (< 63 µm). The first approach, the direct measurement method, uses total organic carbon as a tracer and yielded AE values r
Authors
M.J. Lydy, P.F. Landrum
The role of permafrost and seasonal frost in the hydrology of northern wetlands in North America
Wetlands are a common landscape feature in the Arctic, Subarctic, and north Temperate zones of North America. In all three-zones, the occurrnce of seasonal frost results in similar surface-water processes in the early spring. For example, surface ice and snow generally melt before the soil frost thaws, causing melt water to flow into depressions, over the land surface and at times, across low topo
Authors
M.-K. Woo, Thomas C. Winter
Crude oil in a shallow sand and gravel aquifer—I. Hydrogeology and inorganic geochemistry
Changes in the distribution of inorganic solutes in a shallow ground water contaminated by crude oil document a series of geochemical reactions initiated by biodegradation of the oil. Upgradient of an oil body floating on the water table, oxidation of oil to carbonic acid dissolves carbonate minerals in the aquifer matrix. In this oxidized zone pH is depressed ∼1 pH unit, and the concentrations of
Authors
P.C. Bennett, D.E. Siegel, M.J. Baedecker, M. F. Hult
Red River of the North Basin, Minnesota, North Dakota, and South Dakota
This report describes the physical, chemical, and aquatic-biological characteristics that could affect regional water quality in the Red River of the North study unit. These characteristics define the overall environmental setting of the study unit. This report provides base line and historical information for future reports that will address specific water-quality issues and processes controlling
Authors
Jeffrey D. Stoner, David L. Lorenz, Gregg J. Wiche, Robert M. Goldstein
Hydrologic, chemical, and isotopic characterization of two small watersheds on Catoctin Mountain, north-central Maryland, U.S.A.
Two small (100 ha) watersheds located on Catoctin Mountain in north-central Maryland were intensively instrumented in 1990 and have been hydrologically, chemically, and isotopically monitored for 3 years. Dissolved concentrations of major ions (Ca2+, Mg2+, Na+, K+, total AI, CI-, NO3-, SO42- , HCO3-, and SiO2) and stable isotopic (D and 18O) values have been analyzed for most types of water (preci
Authors
Karen C. Rice, O.P. Bricker
Distributions of pesticides and organic contaminants between water and suspended sediment, San Francisco Bay, California
Suspended-sediment and water samples were collected from San Francisco Bay in 1991 during low river discharge and after spring rains. All samples were analyzed for organophosphate, carbamate, and organochlorine pesticides; petroleum hydrocarbons; biomarkers; and polynuclear aromatic hydrocarbons. The objectives were to determine the concentrations of these contaminants in water and suspended sedim
Authors
Joseph L. Domagalski, K.M. Kuivila