| Since ancient times,floods have brought great threats to human society.With the rapid development of human society,the continuous deterioration of the ecological environment and the acceleration of urbanization,the losses caused by flood disasters are also increasing.For the healthy development of regional economy,national security and social stability,flood disasters have caused serious negative impacts.Therefore,flood disasters have also become a hot issue for researchers in related fields.Hubei Province is known as the "Province of Thousand Lakes".There are many lakes in the province.Naturally,the impact of flooding is more obvious.This has also had a serious impact on the economic development of the society and the safety of people’s lives.Therefore,people’s demand for waterlogging and disaster reduction is becoming increasingly urgent.This paper aims at the waterlogging process in the Jinshui River Basin in 2016,through the establishment of a two-dimensional hydrodynamic model for coupling,and inverts the occurrence process of the flood disaster in 2016.By analyzing the development process of the waterlogging disaster,we find out the important factors affecting the waterlogging disaster,so as to help future floods.Disaster research and reducing the risk and loss of flood disasters provide a certain basis.The main research contents and conclusions of this article are as follows:(1)Through the analysis of the submerged area and water depth,combined with the degree of waterlogging loss and standard setting,the 2016 waterlogging loss was calculated.Different from the flood loss rate method used in the flood risk map compilation project,this project uses the Hubei Province policy agricultural insurance information as the waterlogging loss standard for different types of agricultural products per unit area,which is more in line with the actual situation of the project area,and the results can be the analysis of future flood inundation losses Provide a certain reference.(2)The development of economic crop cultivation and fish farming will lead to rapid growth of losses in the study area in the future when faced with the same level of waterlogging.(3)Through the analysis of climate change,land use change,secondary pumping capacity change,establishment of temporary water storage area,return of farmland to lake,change of agricultural structure and other single factor changes,the study area will be analyzed in 2016.The causes of waterlogging disasters are attributed to five major factors:high rainfall intensity,historical land development,insufficient drainage capacity,lack of storage capacity,and changes in agricultural structure.Among these five factors,the possibility of artificially controlling rainfall intensity is very low;the problems of insufficient drainage capacity and lack of storage capacity can be solved by engineering measures;historical land development is an established fact,making it difficult to implement measures to increase storage capacity.High;changes in agricultural structure are affected by social development,and overall the value of waterlogging per unit area will increase in the future.(4)Focusing on improving the waterlogging capacity and regulating storage capacity,the study area’s waterlogging prevention plan analysis was carried out.It is recommended to adopt comprehensive measures to control waterlogging by setting up temporary water storage areas,returning farmland to lakes and increasing the waterlogging capacity of secondary pumping stations.Significantly increasing the drainage capacity of the secondary pumping station can significantly reduce the area and depth of waterlogging,but the improvement of the drainage capacity of the secondary pumping station has an upper limit;temporary water storage areas with appropriate areas and depths and areas returning to lakes can effectively store waterlogged water. |
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