摘要
初损率(λ)和波速(V)是HEC-HMS洪水模型的两个关键参数,其率定对于提高水文模型的模拟精度具有重要意义。针对这两个参数的特点,提出对其率定的循环渐近法,以福建晋江西溪流域为例,率定相应参数,构建HEC-HMS洪水模型。结果表明:(1)循环渐近法可以较好地率定初损率和波速,参数率定结果合理,模型模拟精度整体较高;(2)起涨流量与初损率密切相关,起涨流量越大,初损率就越小;降雨强度对洪水波波速具有显著影响,降雨强度越大,波速也越大;这两组经验关系的建立有助于拓展模型在洪水预报等工作中的应用。
Initial abstraction ratio and flood wave velocity are two key parameters in HEC-HMS model. Their values determinated reasonably during the calibration are of great significance to improve the simulation accuracy of the model. Approximate circulating method is proposed and Xixi watershed is selected as a study area to set up the HEC-HMS model. Results showed that：（ 1） Values of initial abstraction ratio and flood wave velocity were properly determinated and the accuracy of the model is high with the application of Approximate Circulating method in the calibration of the model.（ 2） Regression analysis indicated that the initial abstraction ratio was closely related to the initial discharge and flood wave velocity was depending on rainfall intensity. The establishment of two empirical formulas is helpful for the model＇s application in flood forecast.
作者
刘传铭
陈兴伟
吴杰峰
LIU Chuanming CHEN Xingwei WU Jiefeng(College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China Fujian Province Engineering Research Center for Monitoring and Assessing Terrestrial Disasters, Fuzhou 350007, China State Key Laboratory Breeding Base of Humid Subtropical Mountain Ecology, Fuzhou 350007, China)
出处
《灾害学》
CSCD
2017年第4期219-223,共5页
Journal of Catastrophology
基金
福建省高校产学合作科技重大项目(2015Y4002)
关键词
参数率定
循环渐近法
洪水
HEC-HMS
西溪流域
parameter calibration
approximate circulating method
flood
HEC-HMS
Xixi watershed
