过渡段水力设计的任务和要求:过渡段的作用是联接控制段和陡槽,使单宽流量小,溢流前缘长的宽浅式进口与宽深合适,开挖和衬砌工程量较省的陡槽有机地结合起来。过渡段大多是变宽、变坡、甚至在平面上曲折的明槽:水力条件比较复杂。在工程实际中,因受地形,地质和泄量等具体条件的限制,要变动I流堰和陡槽的位置或轴线是比较难办的,只有选用合适的过渡段,才能改善水流 The tasks and requirements of the hydraulic design of the transitional section: The role of the transitional section is to connect the control section and the steep groove, so that the single-width flow is small, the wide and shallow inlet with long overflow edge is suitable, the excavation and lining work are more provincial The chute organic combination. Most of the transitional section is widening, changing slope, even in the plane of the meandering trough: hydraulic conditions are more complex. In engineering practice, it is difficult to change the position or axis of the weir and the chute because of the specific conditions of the terrain, geology and discharge, etc. Only by choosing the appropriate transitional section can the water flow be improved