Ice regime analysis and safe dispatch research on long distance water diversion project in winter
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Abstract:
Administration Bureau of South-to-North Water Diversion Middle Route Project, Beijing 100038, China） Abstract: The paper analyzed the temporal and spatial distribution characteristics of ice regime and ice thickness, with ice regime prototype observation data at South-to-North Water Diversion Middle Route Project in 5 winters during 2011~2016. In the winter of 2015 to 2016, ice jam occurred in local canal, because of large discharge, 0.25m/s~0.67m/s flow velocity and cold air(- 18.6℃) . Combined with the dispatching mode of constant water level in front of the gate and canal pool flow characteristics, water control condition was proposed to avoid the formation of ice jam disaster. The upstream section of canal pool should be controlled with V?0.40m/s，Fr?0.065. the downstream section should be controlled with V?0.35m/s，Fr?0.055. It was recommended to increase the full line of ice regime observation and collect more ice observation data, in order to set up scientific basis to optimize the water supply operation scheduling and ice regime forecast in winter.
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