基于MIKE21模型的小清河入海口感潮河段水动力模拟及洪水风险分析

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Hydrodynamic Simulation and Flood Risk Analysis of Tide-sensitive Section of Xiaoqing River Estuary Basedon MIKE 21 Model

HU Wenyan 1 ， ZHOU Sifang 2 ， XU Zhenghe'， PAN Weiyan 1 ，CONG Xin ⋅1 ，LI Yuqi 1 （1.School of Water Conservancy and Environment，Universityof Jinan，Jinan 25OO22，Shandong，China; 2.Shandong Hydrology and Water Environment Technology Co.，Ltd.，Jinan 25Oo14，Shandong，China）

Abstract：Toresearchthehydraulicchangecharacteristicsofriver estuaryandtheriskcaused bydiferent extreme hydrological events，atwo-dimensional hydrodynamicnumerical modelof thetide-sensitive sectionof Xiaoqing River estuary was establishedbyusing MIKE21model.Combinedwiththeflood protectionstandardof theriversection，fourcombinationsof floodand tide encounter weresetupto simulateand analyzethe characteristicsof the water flowchanges of the Xiaoqing River estuaryunder diferentfloodand tidecombinationscenarios，andanalyze theriskof the estuaryunder diferentscenariosaccording tothesimulationresults.Theresultsshowthatwhen therunoff conditions arethesame，the lowerthetidallevelinthelowerreachesoftide-sensitivesection is，thegreater thedecrease in water levelalong he courseis，andthe fastertheflowvelocityis.When thetidallevelsinthe lowerreachesarethesame，thegreater he runoff effect in theupperreachesof tide-sensitivesectionis，the greater the variationrangeofthewaterlevel along the course is，andthefastertheflowvelocityis.Thewatersurface transversedropofthefourcombinationsoffloodtides is gradually increasing inthebendsandtheriskoffloodtidecombinations1and2is higher，andallofthemreach the super-standard flood after the model simulation.

Keywords： tide-sensitive section; hydrodynamics； flood-tide combination；numerical simulation； Xiaoqing River

入海口是一个受陆地和海洋相互作用的特殊地带，具有生态平衡、水质净化、水文调节、航运港口等功能。（剩余8164字）