Influence of ice sheets on water conveyance capacity of water conveyance channel in ice age
Abstract: The prevalence of river ice in cold water projects has increased the load on hydraulic structures and affected normal water supply and power generation, causing huge losses to the people. The latitude of the mid-route of South-to-North Water Diversion project has a large range of latitudes and faces more severe problems of water transportation during glaciation. Therefore, it is necessary to carry out research on water transportation during the ice-age. Based on the midline project of South-to-North Water Diversion Project, the main process of ice hydraulics is analyzed, and a simulation model of water conveyance in ice channel of water conveyance channel is set up to study the water conveyance capacity of winter main canal. The results show that the overcurrent of the ice sheet under the same roughness condition is only slightly less than that of the ice sheet under the same roughness condition when the water conveyance method is adopted. The roughness of the ice sheet is 0.03 , When the water level is increased, the overcurrent capacity of the channel in the freezing period is 60.39% of the design flow rate. This research is of great practical significance to ensure the stable and safe operation of the ice water delivery project.
Key words: Glacier water transport; overcurrent capability; thickened ice sheet; operational control;