2021 Volume 77 Issue 1 Pages 54-58
In this paper, an attempt is made to formulate the upstream water level of the flow over weirs with rectangular longitudinal cross-section in order to give basic information for flood manage planning of the river with weir(s). Experimental data by Govinda Rao and Muranlidhar, which gave the discharge coefficient relating the flow pattern over the crest, were selected as base data. Equations for the upstream water level as the functions of the critical depth, hc, were obtained with application limits almost correspondent to those of the formula by Govinda Rao and Muranlidhar. The obtained formulas gave proper evaluation of the upstream water level in spite of the need for a little correction.