انجمن هیدرولیک ایران نشریه علمی هیدرولیک 2345-4237 5 1 2010 08 23 Estimation of Brink Depth for Prismatic Channels in Sub- critical Approach Flow برآورد عمق آب در لبه آبشار کانال های منشوری با جریان زیربحرانی در بالادست 81 89 85421 10.30482/jhyd.2010.85421 FA سیدوحید نبوی محمد کریم بیرامی Journal Article 2010 03 22 To measure flow discharge and study erosion at the brink of free overfalls, computation of End Depth<br />Relationship (EDR) is required in civil engineering practice. Based on the energy equation, a method<br />is presented to estimate EDR in channels for different cross sections. Using available experimental and<br />theoretical results of other studies, the proposed relationships were examined. This method yields<br />good results for rectangular, triangular, parabolic, inverted semicircular and inverted triangular<br />channels but fairly agrees with the experimental results in the case of trapezoidal and circular cross<br />sections. https://jhyd.iha.ir/article_85421_710244d1d3e14276f43fd8b4b8a0333d.pdf