Analysis on the Influence of Flood Drainage of Cao’e River Sluice on the Hydrodynamics of Waiguantang River

Abstract In order to fully study the impact of Cao’e River Sluice drainage on the external pipe pond and improve the water quality of Shaoxing plain river network, this paper establishes a two-dimensional hydrodynamic model, analyzes the rivers and lakes in Shaoxing plain, and uses the established model to simulate the initial conditions. Through the comparative analysis of the information of the two-dimensional numerical hydrodynamic model and the condition of the river network, we can draw the following conclusions: under normal circumstances, the decline rate of the water surface elevation in Waiguantang river is faster than that in the river network, the overall water surface elevation is relatively stable, and the water surface elevation decreases with the increase of water source distance. The variation range of velocity from the source is large, which is different from the uniform change of water surface elevation. Therefore, the occurrence of flood disaster can be reduced through accurate data analysis.