Relations between stream temperature discharge, and stream/groundwater interaction along several mountain streams
James Constantz, G. Zellweger
B.T. Guy, J. Bernard, editor(s)
1995, Book chapter, Mountain hydrology
No abstract available....
Occurrence and distribution of pesticides in streams of the Midwestern United States
D. A. Goolsby, William A. Battaglin
1995, Book chapter, Agrochemical environmental fate: State of the art
No abstract available. ...
Isotope tracers on water and solute sources in catchments
Carol Kendall, C. Sklash, Thomas D. Bullen
1995, Book chapter, Solute modelling in catchment systems
No abstract available. ...
Transport of reacting solutes in rivers and streams
Robert L. Runkel, Kenneth E. Bencala
Vijay P. Singh, editor(s)
1995, Book chapter, Environmental hydrology
In this chapter we discuss the major processes affecting solutes in rivers and streams. Here a solute is generally defined as any substance or entity that is transported downstream by the flowing waters. Under this definition, solutes may be pollutants, such as pesticides and hydrocarbons, or naturally occurring substances such...
The role of climate in estuarine variability
D. H. Peterson, D. Cayan, J. DiLeo, M. Noble, M. Dettinger
1995, American Scientist (83) 58-67
No abstract available. ...
Year-to-year fluctuation of the spring phytoplankton bloom in south San Francisco Bay: An example of ecological variability at the land-sea interface
James E. Cloern, Alan D. Jassby
1995, Book chapter, Ecological time
Estuaries are transitional ecosystems at the interface of the terrestrial and marine realms. Their unique physiographic position gives rise to large spatial variability, and to dynamic temporal variability resulting, in part, from a variety of forces and fluxes at the oceanic and terrestrial boundaries. River flow, in particular, is an...
A computer model of long-term salinity in San Francisco Bay: Sensitivity to mixing and inflows
R.J. Uncles, D. H. Peterson
1995, Environment International (21) 647-656
A two-level model of the residual circulation and tidally-averaged salinity in San Francisco Bay has been developed in order to interpret long-term (days to decades) salinity variability in the Bay. Applications of the model to biogeochemical studies are also envisaged. The model has been used to simulate daily-averaged salinity in...
The California Desert Conservation Area database for vegetation, wildlife, soils and hydrology with examples of research needs for land management
K.H. Berry, T.A. Rado, P.D. Mack
J.L. Latting, P.G. Rowlands, editor(s)
1995, Book chapter, The California desert: An Introduction to natural resources and man's Impact
No abstract available at this time...
The global topography mission gains momentum
Tom Farr, Diane Evans, Howard Zebker, David Harding, Jack Bufton, Timothy Dixon, S. Vetrella, Dean B. Gesch
1995, Eos, Transactions, American Geophysical Union (76) 213-216
An accurate description of the surface elevation of the Earth is of fundamental importance to many branches of Earth science. Continental topographic data are required for studies of hydrology, ecology, glaciology, geomorphology, and atmospheric circulation. For example, in hydrologic and terrestrial ecosystem studies, topography exerts significant control on intercepted solar...
Mantle helium in ground waters of eastern North America: Time and space constraints on sources
T. Torgersen, S. Drenkard, M. Stute, P. Schlosser, A. Shapiro
1995, Geology (23) 675-678
Mantle helium in continental environments is generally considered to be the result of active volcanism and/or active extension. The latest episodes of volcanism in northeastern North America are the track of the New England hotspot (95–190 Ma) and the closure of the Iapetus sea (before 300 Ma). Thus, the identification...
Characterization of a high-transmissivity zone by well test analysis: Steady state case
Claire R. Tiedeman, Paul A. Hsieh, Sarah B. Christian
1995, Water Resources Research (31) 27-37
A method is developed to analyze steady horizontal flow to a well pumped from a confined aquifer composed of two homogeneous zones with contrasting transmissivities. Zone 1 is laterally unbounded and encloses zone 2, which is elliptical in shape and is several orders of magnitude more transmissive than zone 1....
Fluxes of water and solute in a coastal wetland sediment. l. The contribution of regional groundwater discharge
William K. Nuttle, Judson W. Harvey
1995, Journal of Hydrology (164) 89-107
Upward discharge of fresh groundwater into a mid-Atlantic intertidal wetland contributed 62% of the water needed to replace evapotranspiration losses from the sediment during an 11 day period in September. Infiltration during flooding by tides provided most of the balance; thus there was a net advection of salt into the...
Mapping the response of riparian vegetation to possible flow reductions in the Snake River, Idaho
W. Carter Johnson, Mark D. Dixon, Robert W. Simons, Susan Jenson, Kevin Larson
1995, Geomorphology (13) 159-173
This study was initiated to determine the general effects of potential flow reductions in the middle Snake River (Swan Falls Dam downstream to the Idaho-Oregon border) on its riparian vegetation. Considerable water from the river is currently used to irrigate the adjacent Snake River Plain, and increased demand for water...
Influence of gut content in immature aquatic insects on assessments of environmental metal contamination
D.J. Cain, S. N. Luoma, E.V. Axtmann
1995, Canadian Journal of Fisheries and Aquatic Sciences (52) 2736-2746
We evaluated the effect of metal associated with the gut content in immature aquatic insects (larvae and nymphs) on spatial and interspecific comparisons of whole-body metal concentrations. Four species, common to cobble-bottom rivers and streams, were collected along an established contamination gradient in the Clark Fork River, and from tributaries...
Use of isotopic data to estimate water residence times of the Finger Lakes, New York
Robert L. Michel, Thomas F. Kraemer
1995, Journal of Hydrology (164) 1-18
Water retention times in the Finger Lakes, a group of 11 lakes in central New York with similar hydrologic and climatic characteristics, were estimated by use of a tritium-balance model. During July 1991, samples were collected from the 11 lakes and selected tributary streams and were analyzed for tritium, deuterium,...
Phosphate dynamics in an acidic mountain stream: Interactions involving algal uptake, sorption by iron oxide, and photoreduction
Cathy M. Tate, Robert E. Broshears, Diane M. McKnight
1995, Limnology and Oceanography (40) 938-946
Acid mine drainage streams in the Rocky Mountains typically have few algal species and abundant iron oxide deposits which can sorb phosphate. An instream injection of radiolabeled phosphate (32P0,) into St. Kevin Gulch, an acid mine drainage stream, was used to test the ability of a dominant algal species, Ulothrix...
Assessing nonpoint-source pollution risk: A GIS application
Kenneth J. Lull, James A. Tindall, Donald F. Potts
1995, Journal of Forestry (93) 35-40
No abstract available....
Fate, bioavailability and toxicity of silver in estuarine environments
S. N. Luoma, Y.B. Ho, G.W. Bryan
1995, Marine Pollution Bulletin (31) 44-54
The chemistry and bioavailability of Ag contribute to its high toxicity in marine and estuarine waters. Silver is unusual, in that both the dominant speciation reaction in seawater and the processes important in sorbing Ag in sediments favour enhanced bioavailability. Formation of a stable chloro complex favours dispersal of dissolved...
How wet is wet? Precipitation constraints on late Quaternary climate in the southern Arabian Peninsula
W.W. Wood, Jeffrey L. Imes
1995, Journal of Hydrology (164) 263-268
It is generally recognized that the southern Arabian Peninsula has had two wet periods in the late Quaternary. To quantify ‘wet’ a 28 000 year old capillary surface associated with a paleowater-table was mapped and used as a surrogate for the water table in a ground-water model. Analysis of this...
Applications of isotopes to tracing sources of solutes and water in shallow systems
Carol Kendall, David P. Krabbenhoft
1995, Conference Paper, International Symposium on Groundwater Management - Proceedings
New awareness of the potential danger to water supplies posed by the use of agricultural chemicals has focused attention on the nature of groundwater recharge and the mobility of various solutes, especially nitrate and pesticides, in shallow systems. A better understanding of hydrologic flowpaths and solute sources is required to...
Frequent outburst floods from South Tahoma Glacier, Mount Rainier, USA: Relation to debris flows, meteorological origin, and implications for subglacial hydrology
J. S. Walder, C. L. Driedger
1995, Journal of Glaciology (41) 1-10
Destructive debris flows occur frequently at glacierized Mount Rainier volcano, Washington, U.S.A. Twenty-three such flows have occurred in the Tahoma Creek valley since 1967. Hydrologic and geomorphic evidence indicate that all or nearly all of these flows began as outburst floods from South Tahoma Glacier. Flood waters...
Fluxes of water and solute in a coastal wetland sediment. 2. Effect of macropores on solute exchange with surface water
J. W. Harvey, W.K. Nuttle
1995, Journal of Hydrology (164) 109-125
Chloride was highly concentrated relative to seawater in matrix porewater but was comparatively dilute in macropores. Concentration differences in pore-size classes declined with depth until indistinguishable below 10 cm. The segregated chloride distribution can be explained if recharge to the sediment occurred by downward infiltration in macropores and discharge occurred...
Relation between stream-water quality and geohydrology during base-flow conditions, Roberts creek watershed, Clayton County, Iowa
Stephen J. Kalkhoff
1995, Water Resources Bulletin (31) 593-604
An investigation to determine the relation between stream water quality and geohydrology in the Roberts Creek watershed, Clayton County, Iowa, was conducted during selected base-flow periods in 1988-90. Discharge measurements were made and water samples collected for analyses of nutrients and selected herbicides in 19 subbasins along the main stem...
Mercury cycling in the Allequash Creek watershed, northern Wisconsin
D. P. Krabbenhoft, J.M. Benoit, Christopher L. Babiarz, J.P. Hurley, A.W. Andren
1995, Water, Air, & Soil Pollution (80) 425-433
Although there have been recent significant gains in our understanding of mercury (Hg) cycling in aquatic environments, few studies have addressed Hg cycling on a watershed scale in particular, attention to Hg species transfer between watershed components (upland soils, groundwater, wetlands, streams, and lakes) has been lacking. This study describes...
Concentrations, transport and biological effects of dormant spray pesticides in the San Francisco Estuary, California
K.M. Kuivila, C.G. Foe
1995, Environmental Toxicology and Chemistry (14) 1141-1150
The transport and biological effects of dormant spray pesticides were examined in the San Francisco Estuary, California, by measuring dissolved- pesticide concentrations and estimating toxicity using bioassays at a series of sites in January and February 1993. Distinct pulses of pesticides, including diazinon, methidathion, and chlorpyrifos, were detected in the...
