PIANC Smart Rivers 2022

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Under the background of abnormal and complex changes in the global climate, due to multiple factors such as natural factors and human activities, severe floods have occurred frequently in some areas due to excessive floods.Under normal circumstances, the key structures including the sluice and ship lock discharge the flood of corresponding standards by the sluice. However, in the case of exceeding the standard flood, it is a realistic choice worthy of consideration to include the ship lock into the flood discharge channel and alleviate the flood control pressure in the upstream section of the ship lock.
This paper mainly discusses the feasible methods and measures of using the ship lock emergency discharge to deal with the problem of exceeding the standard flood. Taking a project as an example, the relationship between water level and flow under different discharge modes under the condition of exceeding the standard flood is estimated by theoretical formula, and the feasibility analysis of relevant discharge modes is carried out based on the upper limit of flow velocity. The distribution of discharge flow and downstream velocity field under the condition of gate opening operation are calculated. According to the distribution of flow velocity field, the scope of protection of the downstream side zone is delineated.Suggestions on optimal layout measures for tank protection, anti-scour grooves, slope protection, etc. are put forward.
Finally, according to the research results and the actual requirements of the project, the operation scheduling requirements related to the ship lock in the case of excessive floods are put forward, and relevant emergency preparations are made in advance to avoid destructive disasters.

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