Effects of dams on beach sand supply

In 1975 a regional sediment management study was initiated as a joint applied research project of the Environmental Quality Laboratory, California Institute of Technology, and the Shore Processes Laboratory, Scripps Institution of Oceanography. The project is a broad-based, long-term multidisciplinary effort intended to define the regional sediment budget for coastal Southern California (Figure 1), and to quantify the effects of various human activities on changes in that budget.