Pathways of nutrient loading and impacts on plant diversity in a New York peatland
Judith Z. Drexler, B. L. Bedford
2002, Wetlands (22) 263-281
Nutrient loading is a subtle, yet serious threat to the preservation of high diversity wetlands such as peatlands. Pathways of nutrient loading and impacts on plant diversity in a small peatland in New York State, USA were determined by collecting and analyzing a suite of hydrogeological, hydro-chemical, soil, and vegetation...
Preliminary comparison of landscape pattern-normalized difference vegetation index (NDVI) relationships to central plains stream conditions
J. A. Griffith, E. A. Martinko, J. L. Whistler, K. P. Price
2002, Journal of Environmental Quality (31) 846-859
We explored relationships of water quality parameters with landscape pattern metrics (LPMs), land use–land cover (LULC) proportions, and the advanced very high resolution radiometer (AVHRR) normalized difference vegetation index (NDVI) or NDVI-derived metrics. Stream sites (271) in Nebraska, Kansas, and Missouri were sampled for water quality parameters, the index of...
Subsurface geometry and evolution of the Seattle fault zone and the Seattle Basin, Washington
Uri S. ten Brink, P.C. Molzer, M. A. Fisher, R.J. Blakely, R.C. Bucknam, T. Parsons, R. S. Crosson, K. C. Creager
2002, Bulletin of the Seismological Society of America (92) 1737-1753
The Seattle fault, a large, seismically active, east-west-striking fault zone under Seattle, is the best-studied fault within the tectonically active Puget Lowland in western Washington, yet its subsurface geometry and evolution are not well constrained. We combine several analysis and modeling approaches to study the fault geometry and evolution, including...
Site effects in Avcilar, West of Istanbul, Turkey, from strong- and weak-motion data
O. Ozel, E. Cranswick, M. Meremonte, M. Erdik, E. Safak
2002, Bulletin of the Seismological Society of America (92) 499-508
Approximately 1000 people were killed in the collapse of buildings in Istanbul, Turkey, during the 17 August 1999 I??zmit earthquake, whose epicenter was roughly 90 km east of the city. Most of the fatalities and damage occurred in the suburb of Avcilar that is 20 km further west of the...
Prioritizing conservation potential of arid-land montane natural springs and associated riparian areas
B.C. Thompson, P. L. Matusik-Rowan, K.G. Boykin
2002, Journal of Arid Environments (50) 527-547
Using inventory data and input from natural resource professionals, we developed a classification system that categorizes conservation potential for montane natural springs. This system contains 18 classes based on the presence of a riparian patch, wetland species, surface water, and evidence of human activity. We measured physical and biological components...
Percolation flux and Transport velocity in the unsaturated zone, Yucca Mountain, Nevada
I.C. Yang
2002, Applied Geochemistry (17) 807-817
The percolation flux for borehole USW UZ-14 was calculated from 14C residence times of pore water and water content of cores measured in the laboratory. Transport velocity is calculated from the depth interval between two points divided by the difference in 14C residence times. Two methods were used to calculate...
Effects of ENSO on weather-type frequencies and properties at New Orleans, Louisiana, USA
G.J. McCabe, R.A. Muller
2002, Climate Research (20) 95-105
Examination of historical climate records indicates a significant relation between the El Nino/Southern Oscillation (ENSO) and seasonal temperature and precipitation in Louisiana. In this study, a 40 yr record of twice daily (06:00 and 15:00 h local time) weather types are used to study the effects of ENSO variability on...
Nitrate in aquifers beneath agricultural systems
M. R. Burkart, J.D. Stoner
2002, Conference Paper, Water Science and Technology
Research from several regions of the world provides spatially anecdotal evidence to hypothesize which hydrologic and agricultural factors contribute to groundwater vulnerability to nitrate contamination. Analysis of nationally consistent measurements from the U.S. Geological Survey's NAWOA program confirms these hypotheses for a substantial range of agricultural systems. Shallow unconfined aquifers...
Rare earth element variations resulting from inversion of pigeonite and subsolidus reequilibration in lunar ferroan anorthosites
O.B. James, C. Floss, J. J. McGee
2002, Geochimica et Cosmochimica Acta (66) 1269-1284
We present results of a secondary ion mass spectrometry study of the rare earth elements (REEs) in the minerals of two samples of lunar ferroan anorthosite, and the results are applicable to studies of REEs in all igneous rocks, no matter what their planet of origin. Our pyroxene analyses are used to determine solid-solid REE distribution coefficients (D = CREE in...
Presence of organoarsenicals used in cotton production in agricultural water and soil of the Southern United States
A.J. Bednar, J.R. Garbarino, J. F. Ranville, T.R. Wildeman
2002, Journal of Agricultural and Food Chemistry (50) 7340-7344
Arsenicals have been used extensively in agriculture in the United States as insecticides and herbicides. Mono- and disodium methylarsonate and dimethylarsinic acid are organoarsenicals used to control weeds in cotton fields and as defoliation agents applied prior to cotton harvesting. Because the toxicity of most organoarsenicals is less than that...
Excess density compensation of island herpetofaunal assemblages
G.H. Rodda, K. Dean-Bradley
2002, Journal of Biogeography (29) 623-632
Aim Some species reach extraordinary densities on islands. Island assemblages have fewer species, however, and it is possible that island species differ from their mainland counterparts in average mass. Island assemblages could be partitioned differently (fewer species or smaller individuals) from mainland sites without differing in aggregate biomass (density compensation)....
Methods to achieve accurate projection of regional and global raster databases
E. Lynn Usery, Jeong Chang Seong, Dan Steinwand
2002, Open-File Report 2001-181
Modeling regional and global activities of climatic and human-induced change requires accurate geographic data from which we can develop mathematical and statistical tabulations of attributes and properties of the environment. Many of these models depend on data formatted as raster cells or matrices of pixel values. Recently, it has been...
Distribution of grizzly bears in the Greater Yellowstone Ecosystem, 1990-2000
Charles C. Schwartz, Mark A. Haroldson, Kerry A. Gunther, D. Moody
2002, Ursus (13) 203-212
The Yellowstone grizzly bear (Ursus arctos horribilis) has been expanding its range during the past 2 decades and now occupies historic habitats that had been vacant. A current understanding of the distribution of grizzly bears within the ecosystem is useful in the recovery process and to help guide the state...
Chapter A5. Processing of water samples
Franceska D. Wilde, editor(s)
2002, Techniques of Water-Resources Investigations 09-A5
The National Field Manual for the Collection of Water-Quality Data (National Field Manual) describes protocols and provides guidelines for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation's surface-water and ground-water resources. This chapter addresses methods to be used in processing water samples...
Effects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. Euliss
2002, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds...
Volcanoes of the Alaska Peninsula and Aleutian Islands, Alaska: selected photographs
Christina A. Neal, Robert G. McGimsey
2002, Data Series 40
This CD-ROM contains 97 digital images of volcanoes along the Aleutian volcanic arc in Alaska. Perspectives include distant aerial shots, ground views of volcanic products and processes, and dramatic views of eruptions in progress. Each image is stored as a .PCD file in five resolutions. Brief captions, a location map,...
Geochemistry of surface and pore water at USGS coring sites in wetlands of South Florida, 1994 and 1995
William H. Orem, Harry E. Lerch, Peter Rawlik
2002, Open-File Report 97-454
In this report, we present preliminary data on surface and pore water geochemistry from 22 sites in south Florida sampled during 1994 and 1995. These results are part of a larger study designed to evaluate the role of biogeochemical processes in sediments in the cycling of carbon, nitrogen, phosphorus, and...
Measuring streamflow in Virginia (2002 revision)
Roger M. Moberg, Karen C. Rice, Eugene D. Powell
2002, Open-File Report 95-713
The U.S. Geological Survey (USGS), U.S. Department of the Interior, is the Nation's largest Earth-science information agency. Among its many responsibilities, such as map making and providing information on earthquakes and other natural hazards, the USGS provides information on the Nation's water resources. The USGS has collected and analyzed hydrologic...
Water resources data Texas, water year 2001, volume 5. Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins
Susan C. Gandara
2002, Water Data Report TX-01-5
Water-resources data for the 2001 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 2001, volume 4. Colorado River basin, Lavaca River basin, and intervening coastal basins
Susan C. Gandara
2002, Water Data Report TX-01-4
Water-resources data for the 2001 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 2001, volume 3. San Jacinto River basin, Brazos River basin, San Bernard River basin, and intervening coastal basins
Susan C. Gandara
2002, Water Data Report TX-01-3
Water-resources data for the 2001 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...
Water resources data Texas, water year 2001, volume 2. Trinity River basin
Susan C. Gandara
2002, Water Data Report TX-01-2
Water-resources data for the 2001 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 Texas, water year 2001, volume 6. Ground water
Dana L. Barbie
2002, Water Data Report TX-01-6
Water-resources data for the 2001 water year for Texas consists of records of stage, discharge, and water quality of streams; stage and contents in lakes and reservoirs; and water levels and water quality in wells. Volume 6 contains water levels for 908 observation wells and water-quality data for 155 monitoring...
Water Resources Data, Puerto Rico and the U.S. Virgin Islands, Water Year 2001
Pedro L. Diaz, Zaida Aquino, Carlos Figueroa-Alamo, Rene Garcia, Ana V. Sanchez
2002, Water Data Report PR-01-1
The Water Resources Division of the U.S. Geological Survey, in cooperation with local and Federal agencies obtains a large amount of data pertaining to the water resources of the Commonwealth of Puerto Rico and the Territory of the U.S. Virgin Islands each water year. These data, accumulated during many water...
Water Resources Data--Nebraska, Water Year 2002
D.E. Hitch, S.H. Hull, V.C. Walczyk
2002, Water Data Report NE-02-1
The Water Resources Discipline of the U.S. Geological Survey (USGS), in cooperation with State and local agencies, obtains a large amount of data pertaining to the water resources of Nebraska each water year. These data, accumulated during many water years, constitute a valuable data base for developing an improved understanding...
