يادداشت تحقيقاتي: برآورد عمق آب در لبه آبشار كانال هاي منشوري با جريان زير بحراني در بالادست

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

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 sections.