Scour Control Downstream of Block Ramps

摘要

Scour control downstream of a hydraulic structure is an important topic in river engineering. A block ramp is a structure that can be built with a low-environmental impact stilling basin realized by means of a sill that controls the scour hole. The scour that occurs downstream of block ramps is analyzed and the effect of rock sills on scour geometry is evaluated. Experiments have been carried out with ramp slopes varying between 1V:4H to 1V:12H. Three different sill types were tested for a total of 300 experiments among which about 140 tests involved rock sills. Useful equations for the design of the stilling basin are proposed.