HEC-HMS模型在不同水文气象分区中的改进  

Application of HEC-HMS model in different hydrometeorological regions

作　　者：杨子菁 刘攀 王起峰[2] 李致家[1] 黄迎春[1] 童睿轩 YANG Zijing;LIU Pan;WANG Qifeng;LI Zhijia;HUANG Yingchun;TONG Ruixuan(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250013,China)

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]山东电力工程咨询院有限公司,山东济南250013

出　　处：《河海大学学报（自然科学版）》2023年第2期26-34,共9页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(52079035,51909059);江苏省自然科学基金(BK20190492)。

摘　　要：采用前期影响雨量Pa替换前5 d降水量以评估前期土壤湿润程度、线性内插增加CN值的分级以及根据不同水文气象分区选用适宜初损率λ等改进措施对HEC-HMS半分布式水文模型产流模块中的SCS-CN方法进行改进,并于县北沟、呈村、平和3个中小流域进行验证,探讨了反算法率定SCS模型参数的局限性;通过率定不同流域前期影响雨量下的最适宜CN值(C_(x))并回归C_(x)-P_(a)关系,分析了实际湿润程度随前期影响雨量变化的规律。研究结果表明,当湿润区和半湿润区流域初损率取值0.05和0.20时HEC-HMS模型能取得较好的模拟精度。In order to make the HEC-HMS model universally applied in different hydrometeorological regions,the SCS-CN method in the HEC-HMS’s director runoff module was improved according to the small and medium-sized watersheds of Xianbeigou,Chengcun and Pinghe.The improvement measures include replacing the previous 5 days’rainfall with the antecedent impaction precipitation P a to evaluate the previous soil wetness,adopting the linear interpolation to increase the classification of CN(C_(x))and selecting the appropriate initial loss rateλaccording to the different meteorological and hydrometeorological region.The limitation of the inverse algorithm in the calibration of SCS model parameters is discussed.By calibrating the optimal C_(x) under the pre-affected rainfall in different watersheds and regressing the C_(x)-P_(a) relationship,we explored the law of the change of actual wetness with the pre-affected rainfall.The results show that when the optimal initial loss rate is 0.05 in the humid region and 0.20 in the sub-humid region,a better simulation accuracy can be achieved.The improved method can effectively improve the application effect of HEC-HMS,and provide a reference for the rainfall and runoff simulation in the region with insufficient data.

关 键 词：SCS-CN法 HEC-HMS模型 径流曲线数 初损率 反算法 水文气象分区 

分 类 号：P333[天文地球—水文科学]