Construction and application of river-lake-flood detention basin aggregation flood routing model
To improve the accuracy and efficiency of flood simulation within flood detention basin and maximize its benefits,a river-lake-flood detention basin aggregation flood routing model was proposed based on the Great Lake Model.On this basis,a flood simulation scheme that considers the application of flood detention basins has been established.Taking the actual water in-flow in the Poyang Lake area in 2020 as the boundary condition,and taking 1st July 2020 as starting time point,the real-time scheduling simulation of the flood was carried out under the influence of whether or not applying the farming polders.The simula-tion results show that the proposed model can reasonably and quickly simulate the water level change process over Poyang Lake when the flood detention basin has been applied.After the farming polders are applied,the effect of flood falling is remarkable,with the highest water level in the lake area being reduced by 0.2～0.3 m.Without flood diversion,the highest water level at Hukou Station would exceed the guaranteed water level.The study can provide more accurate hydrological information to support flood detention area scheduling and drought-flood disaster defense.
flood detention basinfarming polder areaflood routingGreat Lake ModelPoyang Lake
万方数据
维普
