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E. James Crompton

Publications and source records attributed to E. James Crompton.

4 recordsLinked to original sources
USGS2008

Traveltime data for the Truckee River between Tahoe City, California, and Vista, Nevada, 2006 and 2007

Traveltime measurements were made during 2006 and 2007 along the Truckee River between Tahoe City, Calif., and Vista, Nev. Fluorescent rhodamine WT dye was injected at various locations along the river during streamflows ranging from 143 to 2,660 cubic feet per second. The resulting data, presented in tabular and graphic form, may be useful to water-quality modelers or water-resources managers concerned with predicting the movement of soluble contaminants accidentally spilled into the Truckee River. The data provided in this report also could be used to determine the dispersion-related characteristics (duration and magnitude of pollutant concentrations) that may be expected in the Truckee River.

California, Nevada↗
USGS2002

Estimated flood flows in the Lake Tahoe basin, California and Nevada

Lake Tahoe, the largest alpine lake in North America, covers about 192 square miles (mi 2 ) of the 506-mi 2 Lake Tahoe Basin, which straddles the border between California and Nevada (Fig. 1). In cooperation with the Nevada Department of Transportation (NDOT), the U.S. Geological Survey (USGS) estimates the flood frequencies of the streams that enter the lake. Information about potential flooding of these streams is used by NDOT in the design and construction of roads and highways in the Nevada portion of the basin. The stream-monitoring network in the Lake Tahoe Basin is part of the Lake Tahoe Interagency Monitoring Program (LTIMP), which combines the monitoring and research efforts of various Federal, State, and regional agencies, including both USGS and NDOT. The altitude in the basin varies from 6,223 feet (ft) at the lake's natural rim to over 10,000 ft along the basin's crest. Precipitation ranges from 40 inches per year (in/yr) on the eastern side to 90 in/yr on the western side (Crippen and Pavelka, 1970). Most of the precipitation comes during the winter months as snow. Precipitation that falls from June through September accounts for less than 20 percent of the annual total.

California, Nevada↗
USGS1995

Potential hydrologic effects of mining in the Humboldt River Basin, northern Nevada

This report provides a general assessment of effects that the current and potential mining activities during the next 5 years may have on the water resources in each of the 34 hydrographic areas in the Humboldt River Basin of northern Nevada. Nearly 40 active gold mines are operating in the basin; of these, 15 are large-scale, open-pit mines. The potential effects of mining were assessed for seven water-resource characteristics or features at various distances from the mining operations. These characteristics are ground-water levels, springs, perennial streams, shallow ground-water areas, sediment transport, agricultural irrigation, and fish and wildlife habitat. The characteristics and features were evaluated at two distances; local (within 2 miles of the operation) and areal (from 2 to 6 miles away from the operation). Additionally, ground-water levels were evaluated at the regional distances: local (with 2 miles of the operation) and areal (from 2 to 6 miles away from the operation). Additionally, ground-water levels were levels were evaluated at the regional distance (more than 6 miles away from the operation). A numerical ranking scale, ranging from a large change expected to no change expected, was developed for each characteristic and feature. For each hydrographic area in the basin, a single value was assigned for each characteristic at each distance. This value represents the greatest change expected to occur in that hydrographic area. The study results show that the greatest changes are expected in two hydro- graphic areas: Pumpernickel Valley and Kelly Creek Area.

Water-Resources Investigations Report↗