Applicability of NASQAN data for ecosystem assessments on the Missouri River
Dale W. Blevins, James Fairchild
2001, Hydrological Processes (15) 1347-1362
The effectiveness of ecological restoration efforts on large developed rivers is often unknown because comprehensive ecological monitoring programs are often absent. Although Eulerian water-quality monitoring programs, such as the National Stream Quality Accounting Network (NASQAN) program, are more common, they are usually not designed for ecological assessment. Therefore, this paper...
Declining scaup populations: A retrospective analysis of long-term population and harvest survey data
A. D. Afton, M.G. Anderson
2001, Journal of Wildlife Management (65) 781-796
We examined long-term databases concerning population status of scaup (lesser [Aythya affinis] and greater scaup [A. marila] combined) and harvest statistics of lesser scaup to identify factors potentially limiting population growth. Specifically, we explored evidence for and against the general hypotheses that scaup populations have declined in association with declining...
Optimal estimation of suspended-sediment concentrations in streams
D. J. Holtschlag
2001, Hydrological Processes (15) 1133-1155
Optimal estimators are developed for computation of suspended-sediment concentrations in streams. The estimators are a function of parameters, computed by use of generalized least squares, which simultaneously account for effects of streamflow, seasonal variations in average sediment concentrations, a dynamic error component, and the uncertainty in concentration measurements. The parameters...
Distribution of oxygen-18 and deuteriun in river waters across the United States
Carol Kendall, Tyler B. Coplen
2001, Hydrological Processes (15) 1363-1393
Reconstruction of continental palaeoclimate and palaeohydrology is currently hampered by limited information about isotopic patterns in the modern hydrologic cycle. To remedy this situation and to provide baseline data for other isotope hydrology studies, more than 4800, depth- and width-integrated, stream samples from 391 selected sites within the USGS...
Seismic reflection images of shallow faulting, northernmost Mississippi embayment, north of the New Madrid seismic zone
J.H. McBride, W.J. Nelson
2001, Bulletin of the Seismological Society of America (91) 128-129
High-resolution seismic reflection surveys document tectonic faults that displace Pleistocene and older strata just beyond the northeast termination of the New Madrid seismic zone, at the northernmost extent of the Mississippi embayment. These faults, which are part of the Fluorspar Area fault complex in southeastern Illinois, are directly in line...
Assessing ecosystem effects of reservoir operations using food web-energy transfer and water quality models
L. Saito, B. M. Johnson, J. Bartholow, R.B. Hanna
2001, Ecosystems (4) 105-125
We investigated the effects on the reservoir food web of a new temperature control device (TCD) on the dam at Shasta Lake, California. We followed a linked modeling approach that used a specialized reservoir water quality model to forecast operation-induced changes in phytoplankton production. A food web–energy transfer model was...
National-scale, field-based evaluation of the biota - Sediment accumulation factor model
Charles S. Wong, Paul D. Capel, Lisa H. Nowell
2001, Environmental Science & Technology (35) 1709-1715
The biota - sediment accumulation factor (BSAF) model has been suggested as a simple tool to predict bioaccumulation of hydrophobic organic compounds (HOCs)in fish and other aquatic biota from measured concentrations in sediment based on equilibrium partitioning between the sediment organic carbon and biotic lipid pools. Currently, evaluation of this...
Modeling consolidation and dewatering near the toe of the northern Barbados accretionary complex
P. Stauffer, B.A. Bekins
2001, Journal of Geophysical Research B: Solid Earth (106) 6369-6383
At the toe of the northern Barbados accretionary complex, temperature and pore water chemistry data indicate that fluid flow is channeled along the décollement and other shallow thrust faults. We examine mechanisms that may prevent consolidation and maintain high permeability over large sections of the décollement. High-resolution bulk density data...
Economic development and conservation of biological and cultural diversity in Yunnan Province, China
Rey C. Stendell, Richard L. Johnson, J.P. Mosesso, X. Zhang
2001, Environmental Development and Sustainability (2) 333-345
Chinese and American scientists are co-operating to develop concepts, strategies, agreements, and proposals in support of an economic development and sustainable ecosystems project in Yunnan Province, People's Republic of China. Yunnan's Provincial Government has initiated a major programme to develop and further utilise its biological resources to help improve economic...
Degradation of marine ecosystems and decline of fishery resources in marine protected areas in the US Virgin Islands
C.S. Rogers, J. Beets
2001, Environmental Conservation (28) 312-322
The large number of marine protected areas (MPAs) in the Caribbean (over 100) gives a misleading impression of the amount of protection the reefs and other marine resources in this region are receiving. This review synthesizes information on marine resources in two of the first MPAs established in the USA,...
Observation of the geology and geomorphology of the 1999 Marsokhod test site
R. A. De Hon, N.G. Barlow, M. K. Reagan, E. Arthur Bettis III, C.T. Foster Jr., V. C. Gulick, L.S. Crumpler, J.C. Aubele, M. G. Chapman, K. L. Tanaka
2001, Journal of Geophysical Research E: Planets (106) 7665-7682
The Marsokhod rover returned data from six stations that were used to decipher the geomorphology and geology of a region not previously visited by members of the geomorphology field team. Satellite images and simulated descent images provided information about the regional setting. The landing zone was on an alluvial apron...
Nitrogen input to the Gulf of Mexico
D. A. Goolsby, W.A. Battaglin, Brent T. Aulenbach, R. P. Hooper
2001, Conference Paper
Historical streamflow and concentration data were used in regression models to estimate the annual flux of nitrogen (N) to the Gulf of Mexico and to determine where the nitrogen originates within the Mississippi Basin. Results show that for 1980-1996 the mean annual total N flux to the Gulf of Mexico...
Understanding aquatic animal virus survival and trafficking and its role in risk assessment
S. LaPatra, R. Troyer, W. Shewmaker, G. Jones, Gael Kurath
C.J. Rogers, editor(s)
2001, Conference Paper, Proceedings of the Office International des Epizooties (OIE) International Conference on Risk Analysis in Aquatic Animal Health
The stability of infectious agents in different media and under different physical and chemical environments has been extensively studied for some viruses and virtually ignored for others. Gaps in our knowledge are due in part to difficulties in reproducing virus «life cycles» and determination if the agent is in fact...
Avian communities in baylands and artificial salt evaporation ponds of the San Francisco Bay estuary
John Y. Takekawa, C.T. Lu, R.T. Pratt
2001, Hydrobiologia (466) 317-328
San Francisco Bay wetlands, seasonal and tidal marshes between the historic low and high tide lines, are now highly fragmented because of development during the past 150 years. Artificial salt pond systems in the Bay are hypersaline and typically support simple assemblages of algae and invertebrates. In order to establish...
Time series of suspended-solids concentration, salinity, temperature, and total mercury concentration in San Francisco Bay during water year 1998
Catherine A. Ruhl, David H. Schoellhamer
2001, Report
Many physical processes affect how constituents within San Francisco Bay vary. Processes and their associated time scales include turbulence (seconds), semidiurnal and diurnal tides (hours), the spring-neap tidal cycle (days), freshwater flow (weeks), seasonal winds (months), ecological and climatic changes (years), and geologic changes (thousands of years). Continuous time series...
Digital geologic map of the Fawnskin 7.5' quadrangle, San Bernardino County, California
F. K. Miller, J. C. Matti, H.J. Brown, R. E. Powell, P. M. Cossette, Gregory Morton
2001, Open-File Report 98-579
Version 1.1 of this Open-File Report contains a digital geologic map and map database of the Fawnskin 7.5' quadrangle, San Bernardino County, California, that includes: 1. ARC/INFO (Environmental Systems Research Institute) version 7.2.1 double-precision coverages of the various elements of the geologic map 2. A PostScript (.ps) file to plot the geologic...
Volcanoes of the Wrangell Mountains and Cook Inlet region, Alaska: selected photographs
Christina A. Neal, Robert G. McGimsey, Michael F. Diggles
2001, Data Series 39
Alaska is home to more than 40 active volcanoes, many of which have erupted violently and repeatedly in the last 200 years. This CD-ROM contains 97 digitized color 35-mm images which represent a small fraction of thousands of photographs taken by Alaska Volcano Observatory scientists, other researchers, and private citizens....
Water resources data Texas, water year 2000, volume 5. Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-5
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 5 contains records for...
Water resources data Texas, water year 2000, volume 4. Colorado River basin, Lavaca River basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-4
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 4 contains records for...
Water resources data Texas, water year 2000, volume 3. San Jacinto River basin, Brazos River basin, San Bernard River basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-3
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 3 contains records...
Hydrogeology and ground-water quality of the county road a disposal site on the Bad River Indian Reservation, Ashland County, Wisconsin: 1997-98
C. P. Dunning, Douglas J. Yeskis
2001, Water-Resources Investigations Report 2001-4082
The County Road A disposal site, located on the Bad River Indian Reservation, Ashland County, Wisconsin, contains papermill sludge generated by a former mill in the City of Ashland. Since the time of disposal (1968-1970) the site has been the subject of investigations by the U.S. Bureau of Indian Affairs,...
hypoDD-A Program to Compute Double-Difference Hypocenter Locations
Felix Waldhauser
2001, Open-File Report 2001-113
HypoDD is a Fortran computer program package for relocating earthquakes with the double-difference algorithm of Waldhauser and Ellsworth (2000). This document provides a brief introduction into how to run and use the programs ph2dt and hypoDD to compute double-difference (DD) hypocenter locations. It gives a short overview of the DD...
Water resources data Texas, water year 2000, volume 2. Trinity River basin
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-2
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 2 contains records for...
Water resources data, Washington, water year 1999
T. J. Zembrzuski, W.D. Wiggins, R. R. Smith, G.P. Ruppert, S.M. Knowles, V.F. Renslow
2001, Water Data Report WA-99-1
The Water Resources Division of the U.S. Geological Survey (USGS), in cooperation with State, local, and other Federal agencies, obtains a large amount of data pertaining to the water resources of Washington each water year. These data, accumulated during many water years, constitute a valuable data base for developing an...
Water resources data, West Virginia, water year 2000
S.M. Ward, B.C. Taylor, G.R. Crosby
2001, Water Data Report WV-00-1
The Water Resources Division of the U.S. Geological Survey, in cooperation with State and Federal agencies, obtains a large amount of data pertaining to the water resources of West Virginia each water year. These data, accumulated during many water years, constitute a valuable data base for developing an improved understanding...
