ANNUAL REPORT OF COMMITTEE ON SURFACE DRAINAGE OF HIGHWAYS, JANUARY 1958

HYDRAULIC RESEARCH HAS CONTINUED DURING 1957 ON BACKWATER CAUSED BY BRIDGES, FLOW DISTRIBUTION THROUGH MULTIPLE BRIDGES, SCOUR AROUND BRIDGE ABUTMENTS, EFFECT OF CULVERT INLET DESIGN ON DISCHARGE CAPACITY, HYDRAULIC ROUGHNESS OF CONCRETE PIPE, PRESSURE CHANGES AT STORM DRAIN JUNCTIONS, AND PEAK RUNOFF RATES FROM URBAN WATERSHEDS, TO MENTION ONLY THE MAJOR PROJECTS KNOWN TO THE COMMITTEE. AN EQUALLY LONG LIST HAS BEEN COMPILED FOR PROBLEMS ON WHICH RESEARCH IS NEEDED. /AUTHOR/