Estimation of Brink Depth for Prismatic Channels in Sub- critical Approach Flow

Document Type : Technical Note



To measure flow discharge and study erosion at the brink of free overfalls, computation of End Depth
Relationship (EDR) is required in civil engineering practice. Based on the energy equation, a method
is presented to estimate EDR in channels for different cross sections. Using available experimental and
theoretical results of other studies, the proposed relationships were examined. This method yields
good results for rectangular, triangular, parabolic, inverted semicircular and inverted triangular
channels but fairly agrees with the experimental results in the case of trapezoidal and circular cross