Hydraulic Model Study of Twin Buttes Dam Fuse Plug Spillway

摘要

A 1 to 150 scale hydraulic model study of the proposed fuse plug embankment at Twin Buttes Dam in San Angelo, Texas was performed to investigate the discharge capacity of the fuse plug spillway. A secondary consideration was the effect of the mesquite trees located in the long approach channel to the fuse plug spillway. A technique was developed to estimate the equivalent sand grain roughness of the mesquite trees by simulating the trees in a 1 to 30 scale model and performing a momentum balance between two locations. The roughness was then simulated in the 1 to 150 scale hydraulic model, and a discharge rating curve through the fuse plug spillway was completed.