USDA Forest Service

Pacific Southwest Research Station

Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Predicting and managing changes in nearshore water quality

Aquatic InvasivesPrincipal Investigators:
Geoff Schladow, University of California-Davis
Rick Susfalk, Desert Research Institute
Alan Heyvaert, Desert Research Institute
Sudeep Chandra, University of Nevada-Reno
Francisco Rueda, University of Granada
Fabian Bombardelli, University of California-Davis

Proposal [pdf]

Final Report [pdf]

Please contact Dr. Geoff Schladow with questions regarding the final report.

Project Summary

This project brought together a broad range of scientists and engineers to start filling in the many knowledge gaps that exist with respect to the nearshore zone of Lake Tahoe. The nearshore zone in any lake is invariably complex. This zone is where the watershed influences first impact the lake and are therefore present at their full impact or largest concentrations; it is where the water depth is continually varying; it is where the interactions between the sediments of the benthic zone and the water column are greatest; it is where temperature extremes are greatest (warmest water in summer and coldest water in winter); and, it is where human interactions with the lake and impacts on the lake are greatest.

The research undertaken here focused on the following key areas: measurement of the current driven physical processes of the nearshore, in particular sediment re-suspension; the modeling of wind driven waves across the surface of Lake Tahoe and their impact on sediment re-suspension; the development of a three-dimensional hydrodynamic model that can be used to understand the currents in the lake and their impact on issues such as transport of contaminants and invasive species; a refinement of the three-dimensional hydrodynamic model using a nested grid approach in which small within the nearshore zone can be better represented and studied; a survey of the algae that coat the rocks of the nearshore zone of Lake Tahoe; the invasive species, most of which have their introduction in the nearshore and continue to live there; and, measurements on the influence of urban runoff on the water of the nearshore.