Calculation of Water Surface Profile at Non-uniform Flow by Step Method When Square Post Put Interval on the Side Wall of Open Channel

Abstract

When square post put an interval on the side wall of open channel, water surface profile is variable by acceleration and deceleration of velocity at continued sudden contraction and sudden enlargement. when waterway is tunnel, flow patern is changed from open channel to pipe. lt have an influence to construction's safety by conveyance and pressure.
In this paper, we watch a separation region formed behind a square post, meet the equation of continuity at outside of a separation region, water surface profile of non-uniform flow was able to calculate easily by step method.