Computer Programming for Flow over Side Weirs

A procedure is presented for computing water surface profiles and discharge in an open channel with flow over side weirs. There is little restriction about the channel shape, variation of invert slope, convergence of the channel along the length of weir, etc. A criterion for determining whether flow will be subcritical or supercritical on a mild slope is also developed. The procedure is illustrated by some examples. Some deficiencies in available knowledge are noted.