Calculation of capacity of spillway № 2 Boguchanskoye HPP with free water overflow

The article considers a variant with the operation of spillway No. 2 Boguchanskaya HPP as main structure for period temporary hydroelectric complex. In process developing options skipping construction costs, calculation was made throughput free overflow through flat threshold at level 167.0m FSL=175m and forcing UVB to 185.0 m damping flow energy in water well. task calculations is obtain discharge characteristics considered option calculated flood hydrograph probability 0.2%. At same time, based on capacity 1, dependence turbine rate depth downstream, well transformation given probability, estimated 5500 m3/s, maximum head H=18 (determining) minimum 167.0 m. Weir refers weirs wide threshold. 2, operating mode, determined. change lateral compression coefficient depending middle outer working spans considered. outlines free-falling jets behind culverts mode are obtained, which makes it possible refine side walls spillway.