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Kenn D. Cartier

Publications and source records attributed to Kenn D. Cartier.

4 recordsLinked to original sources
USGS1994

Development and documentation of spatial data bases for the Lake Tahoe Basin, California and Nevada

A set of spatial data bases consisting of natural- resources and planimetric-base layers has been developed and documented for the Lake Tahoe Basin, California and Nevada. The data bases, in the form of geographic information system coverages, include surface geology, soils, timber type, riparian vegetation, land capability, stream channels, water bodies, roads, political boundaries, the Lake Tahoe Basin boundary, slope, aspect, drainage-basin boundaries, and hydrologic-monitoring sites. The data bases were developed from existing thematic maps, digital data, and hydrographic records. Data were compiled from maps and records of Federal, State, and local agencies. The scale of source materials ranged from 1:24,000 to 1:125,000 and their release dates. from 1964 to 1989. Documen- tation and summary information are included for each spatial data base.

California, Nevada↗
USGS1989

Methods for estimating monthly streamflow characteristics at ungaged sites in western Montana

Three methods were developed for estimating monthly streamflow characteristics for western Montana. The first method, based on multiple-regression equations, relates monthly streamflow characteristics to various basin and climatic variables. Standard errors range from 43 to 107%. The equations are generally not applicable to streams that receive or lose water as a result of geology or that have appreciable upstream storage or diversions. The second method, based on regression equations, relates monthly streamflow characteristics to channel width. Standard errors range from 41 to 111%. The equations are generally not applicable to streams with exposed bedrock, with braided or sand channel, or with recent alterations. The third method requires 12 once-monthly streamflow measurements at an ungaged site. They are then correlated with concurrent flows at some nearby gaged site, and the resulting relation is used to estimate the required monthly streamflow characteristic at the ungaged site. Standard errors range from 19 to 92%. Although generally substantially more reliable than the first or second method, this method may be unreliable if the measurement site and the gage site are not hydrologically similar. A procedure for weighting individual estimates, based on variance and degree of independence of individual estimating methods, was also developed. Standard errors range from 15 to 43% when all three methods are used. The weighted-average estimated from all three methods are generally substantially more reliable than any of the individual estimates.

Western Montana↗