Flood routing simulation of hongze lake detention basin based on Mike Flood
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Abstract:
Gauged cross section data is used for 1-D hydrodynamic model, and both high resolution DEM and topographic map of 1:10000 is used for 2-D hydrodynamic model. A 1D-2D coupled mathematical model is established to simulate flood routing in Hongze Lake Detention Basin based on Mike Flood. The historical flood data in 2003 and 2007 is used to calibrate and verify the parameters in this model. Calculation of design flood plan(P=1%) is used for model simulation in which design inflow is used for upper boundary of model and Q-H curves of Sanhe Gate, Erhe Gate and Gaoliangjian Gate is used for lower boundary of model. Hongze Lake Detention Basin begins impound when the water level of Jiangba station exceed 14.33m. The dynamic distribution of risk elements in the study area indicates that the model has rationality in simulation. With the increase in flood magnitude, flooded area, flooded duration and other risk factors showed a change of trend. It can be used for flood routing analysis in detention basin.