Operation scheme for maximum opening test of check gates in South-to-North Water Diversion Project
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Abstract:
The Middle Route Project (MRP) of South-to-North Water Diversion (SNWD) has 64 check gates. The check gates need to be tested under the flowing water from zero to the maximum opening to ensure the safe operation of the SNWD project. Certain operation measures need to be taken in order to complete the maximum opening test when the dividing gates have not yet met the design discharge. This article analyzed the feasibility of a maximum opening test based on a typical check gate, and compared the operation scheme across several specific conditions. After preliminary study, it selected the scheme of “adjusting the water level of local canal reaches with control gates”, where the hydraulic conditions of upstream and downstream control structures of the piloting check gate were adjusted to ensure relatively stable water supply and water level at the piloting check gate and the upstream and downstream canal reaches, thus realizing the maximum opening test.
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