为分析圩院式防洪模式对流域防洪的影响,以秦淮河流域为研究区,构建HEC-HMS水文模拟模型,分析不透水率、允许水深、排涝模数的变化对流域洪峰和洪量模拟结果的影响。研究结果表明:随着流域不透水率从20%增大至70%时,圩垸式防洪模式下流域洪量和洪峰均呈现增大趋势;当圩垸允许水深增大时,圩垸式防洪模式下流域洪量呈递减趋势,而流域洪峰呈递增趋势;随着排涝模数的降低,流域的洪峰和洪量呈递减趋势。研究成果对秦淮河流域及相似流域的HEC-HMS模型洪水模拟及参数设置具有借鉴和指导意义。
Abstract
The impermeability of basin, allowable water depth and drainage modulus of polder are main parameters of basin flood simulation in the HEC-HMS (The Hydrologic Engineering Center’s Hydrologic Modeling System) model under polder flood control mode.The setting of these parameters has strong impact on the simulation results. Taking Qinhuai River Basin as research area, we constructed an HEC-HMS hydrological simulation model to analyze the influence of impermeability, allowable water depth and drainage modulus on flood peak and flood volume simulation results. Results revealed that with impermeability increasing from 20% to 70%, the flood volume and flood peak of river basin in polder flood control mode displayed consistent rising trend. When the allowable water depth of polder raise, the flood volume of the basin in the polder mode was decreasing, while the flood peak was increasing. Moreover, with the reduction of drainage modulus, the flood peak and flood volume of the basin were decreasing.
关键词
HEC-HMS模型 /
洪水模拟 /
参数变化 /
圩垸 /
秦淮河流域
Key words
HEC-HMS model /
flood simulation /
parameter change /
polder /
Qinhuai River Basin
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基金
国家自然科学基金青年项目(51309076);中央高校基金前瞻性项目(2014B05814);江苏省优势创新平台项目(3014-SYS1401)
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