变动单位线与纳西瞬时单位线在洪水预报中的应用  

Variable Unit Hydrograph and Nash IUH in Flood Forecasting Application

作　　者：雷璐[1] 宋星原[1] 罗鹏[1] 杨琳[1] 

机构地区：[1]武汉大学水资源与水电工程国家重点实验室,湖北武汉430072

出　　处：《水电能源科学》2011年第3期51-53,共3页Water Resources and Power

基　　金：国家自然科学基金资助项目(51079099)

摘　　要：针对洪水预报中采用不同的地面汇流方式影响预报精度的问题,将变动单位线与纳西瞬时单位线法分别应用于湖南省嘉禾子流域的地面汇流部分,采用遗传算法优选产汇流参数,并比较了两种方法的汇流结果。结果表明,采用变动单位线法的建模结果优于纳西瞬时单位线法的建模结果。Different methods of surface routing affect the flood forecasting precision.Variable unit hydrograph and Nash instantaneous unit hydrograph are chosen to surface routing in Jiahe sub-basin of Ouyanghai reservoir in Hunan Province.Then,genetic algorithm is used to optimize the convergence model parameters.Finally,the concentration results of two methods are compared. It shows that the modeling result with variable unit hydrograph is better than that of Nash instantaneous unit hydrograph.

关 键 词：变动单位线 纳西瞬时单位线 三水源新安江模型 洪水预报 遗传算法 

分 类 号：TV122[水利工程—水文学及水资源] P333[天文地球—水文科学]