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Page 2547, results 63651 - 63675

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An assessment of optical properties of dissolved organic material as quantitative source indicators in the Santa Ana River basin, Southern California
Brian A. Bergamaschi, Erica Kalve, Larry Guenther, Gregory O. Mendez, Kenneth Belitz
2005, Scientific Investigations Report 2005-5152
The ability to rapidly, reliably, and inexpensively characterize sources of dissolved organic material (DOM) in watersheds would allow water management agencies to more quickly identify problems in water sources, and to more efficiently allocate water resources by, for example, permitting real-time identification of high-quality water suitable for ground-water recharge, or...
Literature review for Texas Department of Transportation Research Project 0-4695: Guidance for design in areas of extreme bed-load mobility, Edwards Plateau, Texas
Franklin T. Heitmuller, William H. Asquith, Xing Fang, David B. Thompson, Keh-Han Wang
2005, Open-File Report 2005-1234
A review of the literature addressing sediment transport in gravel-bed river systems and structures designed to control bed-load mobility is provided as part of Texas Department of Transportation research project 0–4695: Guidance for Design in Areas of Extreme Bed-Load Mobility. The study area comprises the western half of the Edwards...
Estimating the magnitude and frequency of floods for streams in west-central Florida, 2001
Kathleen M. Hammett, Michael J. DelCharco
2005, Scientific Investigations Report 2005-5080
Flood discharges were estimated for recurrence intervals of 2, 5, 10, 25, 50, 100, 200, and 500 years for 94 streamflow stations in west-central Florida. Most of the stations are located within the 10,000 square-mile, 16-county area that forms the Southwest Florida Water Management District. All stations had at least...
Evidence of cold climate slope processes from the New Jersey Coastal Plain: Debris flow stratigraphy at Haines Corner, Camden County, New Jersey
Wayne L. Newell
2005, Open-File Report 2005-1296
Excavations through surficial deposits across the New Jersey Coastal Plain commonly reveal homogenized surficial sediments, deformed sedimentary structures, chaotically rearranged bed-forms, and wedge-shaped cracks filled with sand from the top-most layers of extant soil profiles. As a whole, these abundant, broadly distributed phenomena are best explained as artifacts of...
Nutrients, organic compounds, and mercury in the Meduxnekeag River watershed, Maine, 2003
Charles W. Schalk, Lan Tornes
2005, Scientific Investigations Report 2005-5111
In 2003, the U.S. Geological Survey, in cooperation with the Houlton Band of Maliseet Indians, sampled streambed sediments and surface water of the Meduxnekeag River watershed in northeastern Maine under various hydrologic conditions for nutrients, hydrophobic organic compounds, and mercury. Nutrients were sampled to address concerns related to summer algal...
Surface complexation studied via combined grazing-incidence EXAFS and surface diffraction: Arsenate on hematite (0001) and (10-12)
G. Waychunas, T. Trainor, P. Eng, J. Catalano, G. Brown, J. Davis, J. Rogers, J. Bargar
2005, Analytical and Bioanalytical Chemistry (383) 12-27
X-ray diffraction [crystal-truncation-rod (CTR)] studies of the surface structure of moisture-equilibrated hematite reveal sites for complexation not present on the bulk oxygen-terminated surface, and impose constraints on the types of inner-sphere sorption topologies. We have used this improved model of the hematite surface to analyze grazing-incidence EXAFS results for arsenate...
Development and use of in-stream PIT-tag detection systems to assess movement behavior of fish in tributaries of the Columbia River Basin, USA
P.J. Connolly, I.G. Jezorek, E.F. Prentice
2005, Conference Paper
We have developed detector systems for fish implanted with Passive Integrated Transponder (PIT) tags to assess their movement behavior and habitat use within fast flowing streams. Fish tested have primarily been wild anadromous and resident forms of rainbow trout Oncorhynchus mykiss and cutthroat trout O. clarki. Longitudinal arrangements of two-...
Lag and seasonality considerations in evaluating AVHRR NDVI response to precipitation
Lei Ji, Albert J. Peters
2005, Photogrammetric Engineering and Remote Sensing (71) 1053-1061
Assessment of the relationship between the normalized difference vegetation index (NDVI) and precipitation is important in understanding vegetation and climate interaction at a large scale. NDVI response to precipitation, however, is difficult to quantify due to the lag and seasonality effects, which will vary due to vegetation cover type, soils...
Historical and simulated changes in channel characteristics of the Kalamazoo River, Plainwell to Otsego, Michigan
Cynthia M. Rachol, Faith A. Fitzpatrick, Tiffiny Rossi
2005, Scientific Investigations Report 2005-5044
In a study to understand the historical effects of the construction and decommissioning of dams on the Kalamazoo River, Plainwell to Otsego, Michigan, and to simulate channel changes that may result if the dams were removed, early to mid-1800s General Land Office surveys and aerial photographs from 1938, 1981, and...
A 24 h investigation of the hydrogeochemistry of baseflow and stormwater in an urban area impacted by mining: Butte, Montana
Chris Gammons, Christopher L. Shope, Terence E. Duaime
2005, Hydrological Processes (19) 2737-2753
Changes in water quality during a storm event were continuously monitored over a 24 h period at a single location along an urban stormwater drain in Butte, Montana. The Butte Metro Storm Drain (MSD) collects groundwater baseflow and stormwater draining Butte Hill, a densely populated site that has been severely...
Environmental setting, water budget, and stream assessment for the Broad Run watershed, Chester County, Pennsylvania
Peter J. Cinotto, Andrew G. Reif, Leif E. Olson
2005, Scientific Investigations Report 2005-5156
The Broad Run watershed lies almost entirely in West Bradford Township, Chester County, Pa., and drains 7.08 square miles to the West Branch Brandywine Creek. Because of the potential effect of encroaching development and other stresses on the Broad Run watershed, West Bradford Township, the Chester County Water Resources Authority,...
Charting color from the eye of the beholder
Edward Landa, Mark Fairchild
2005, American Scientist (93) 436-436
Everyone knows the particular shade of yellow that adorns all school buses across the United States. But how do we define exactly what shade this is, and reproduce the same color from coast to coast? Much of the standardization of colors stems from the century-old work of Alfred Munsell, who...
Controls on the physical properties of gas-hydrate-bearing sediments because of the interaction between gas hydrate and porous media
Myung W. Lee, Timothy S. Collett
2005, Scientific Investigations Report 2005-5143
Physical properties of gas-hydrate-bearing sediments depend on the pore-scale interaction between gas hydrate and porous media as well as the amount of gas hydrate present. Well log measurements such as proton nuclear magnetic resonance (NMR) relaxation and electromagnetic propagation tool (EPT) techniques depend primarily on the bulk volume of gas...