Study on Hydraulic Response Characteristics of Canal Pools Under Flow Regulation and Gate Control Conditions
The issue of hydraulic regulation in long-distance open channel water transfer projects is directly related to the safety and efficient operation of the project.When the water supply demand changes,adopting reasonable incoming flow regulation and gate control schemes is key to achieving downstream water supply targets.This paper takes the initial operation stage of the Hanjiang-to-Weihe River Valley Water Diversion Project as the subject of research,establishes a hydrodynamic mathematical model,and focuses on the simulation calculation and theoretical analysis of the hydraulic characteristics of tunnels and distribution pools.It compares the response time and water level changes in the diversion pool under different incoming water flow regulation or gate opening control conditions when the target flow rate is reached in the Heihe water supply connection tunnel.The results show that when the sluice gate is fully open,the larger the in-coming flow of the Qinling Tunnel varies,the earlier the downstream water level fluctuation appears,and the shorter the channel response time,with the hydraulic response time decreasing logarithmically with increasing supply flow;When the incoming flow of the Qinling Tunnel remains unchanged,the supply flow increases with the opening of the intake gate,and the hydraulic response time increases exponentially with the increase of supply flow;Maintaining the incoming flow unchanged and only controlling the gate opening can easily cause the water level in the distribution pool to exceed the crest of the side weir,resulting in water spillage.The research results can be used for reference to optimize the scheduling strategy and improve the dynamic response ability of water transmission system.
万方数据
维普
