Sponsored by the Water Resources Engineering (Hydraulics) Divsion of ASCE. This collection contains 75 papers and 321 abstracts presented at conferences sponsored by the Water Resources Engineering (Hydraulics) Division of ASCE from 1991 through 1998. The collection contains many new and expanded versions of the original papers and is designed to assist the practitioner with the concepts in evaluating stream instability and scour at bridges. Topics include: history of bridge scour research; bridge scour determination; stream stability and geomorphology; construction scour; instrumentation for measuring and monitoring; field measurement; computer and physical modeling of bridge scour; scour at culverts; and economic and risk analysis. One important paper contains 384 field measurements of local scour at piers made by the U.S. Geological Survey.

Proceedings of the National Conference on Hydraulic Engineering held in San Francisco, California, July 25-30, 1993. This collection contains 400 papers discussing the reduction of humanmade and natural disasters through hydraulic engineering. Topics include: disaster and hazard reduction; wetland and tidal hydraulics; mechanics of debris flows; sediment transport; bridge scour; three-dimensional flow modeling; computational hydraulics; California water issues; and probabilistic approaches to hydraulics. Engineers who are involved with these hydraulic engineering issues will find this proceedings an excellent source of information.