1989•Applied Engineering in AgricultureRequires access
Scour at the Straight Drop Spillway with High Tailwater
Charles E. Rice, Kem C. Kadavy
Open publisher page 0 citations
Abstract
Tests made to determine the effect of high tailwater and long duration flows on scour downstream of the straight drop spillway are described in this paper. Results are presented on performance with the standard design basin, the basin with a nappe-shaped weir crest, and basins with rounded abutments at the entrance to the stilling basin. The basins with the rounded abutments performed best and the standard design basin performed poorest. Based on these tests, from a hydraulic performance standpoint, the straight drop spillway should be designed using rounded abutments with a 2H or larger radius of rounding (H is the specific head in the approach channel).