2024 Volume 80 Issue 4 Article ID: 23-00165
In the flood management planning of the river in which weir(s) is/are placed or operation of tipping weir, weir hydraulics should be considered from various directions. But most of the previous studies exclusively directed towards discharge evaluation, and evaluation of the water level just upstream of the weir, which is particularly important for water flood management of the river in which weir(s) is/are set, is extremely rare. Also, as far as we searched for, there exist no study evaluating weir height which is required to suppress upstream water level at desired value under the designated discharge. In this paper, we derived the equations for each of the discharge, upstream water level and weir height of the submerged flow over sharp-crested weirs, from downstream water level plus two quantities other than itself. The calculation showed good agreement with the results of the previous experiments carried out precisely and systematically.
