Impacts of Natural and Manmade Changes on the San Luis Rey River Environmentby Chenchayya T. Bathala, (M.ASCE), Parsons Brinckerhoff Quade &, Douglas, Inc, Orange, United States,
W. Jeffery Moncrief, (M.ASCE), Parsons Brinckerhoff Quade &, Douglas, Inc, Orange, United States,
Abstract: Almost all rivers continually change their position and shape based on various geomorphic and hydraulic factors, caused by natural as well as manmade activities on the riverine environment. These changes are reflected in aggradation, degradation and/or lateral migration of a river. Man's activities, however, appear to cause rapid and unexpected changes in watersheds and rivers in a relatively short period. This paper describes the impacts of both natural and manmade changes that occurred over a long period on the San Luis Rey River environment in the San Diego County, California. Based on an evaluation of these impacts, several recommendations are presented to protect and preserve the riverine environment.
Subject Headings: Rivers and streams | Hydraulics | Chemical degradation | Watersheds | North America | California | United States | San Diego
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