Analysis of Rainstorm and Flood in the Lixiahe River Region in 2023
The Lixiahe river region boasts a flat terrain,a complex river network,and a water regime that spreads slowly,making it susceptible to super-alert flood process.In order to study the characteristics of rainfall during the Meiyu period in 2023,Pearson Ⅲ frequency curve method,anomaly analysis method and hourly process chart method of rainfall level were used to analyze the storm flood characteristics by comparing the rainfall during the historical Meiyu pe-riod.The conclusion is that there is no rainfall and extreme rainfall in some areas.There is an extremely heavy rainstorm in the maximum one-day rainfall,and 8.4%of places have an extremely heavy rainstorm in the maximum three-day rain-fall.The short duration high intensity rainfall process and topography of river network in the Lixiahe river region are the main reasons for occurrence of super-alert flood process.The drainage along the river and five major ports has a signifi-cant impact on the water level changes in the Lixiahe river region during the flood process.
Lixiahe River regionMeiyu periodrainstorm and floodP-Ⅲ curveanomaly analysiscoverage area
NETL
NSTL
万方数据
