一种无资料流域综合单位线计算方法  

A Method Deriving Synthetic Unit Hydrographs of Ungauged Basins

作　　者：王小赞[1] 孔凡哲[1] 郭良[2] WANG Xiao-zan;KONG Fan-zhe;GUO Liang(School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China;Research Center on Flood and Drought Disaster Reduction of the Ministry of Water Resources,Beijing 100038,China)

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]水利部防洪抗旱减灾工程技术研究中心,北京100038

出　　处：《水电能源科学》2019年第11期24-27,40,共5页Water Resources and Power

基　　金：全国山洪灾害防治建设与管理(中央本级)项目(JZ0145B2017)

摘　　要：综合单位线是无资料流域水文分析和水文预报的主要工具。为丰富综合单位线方法,构建一个新的流域特征,即面积-距离/坡度函数(f-LLP),分析单位线峰现时间(Tqmax)与f-LLP函数中最大f值对应的LLP(LLPfmax)之间的关系,借助概化的单位线几何形状,计算单位线。利用白土岗、娄子沟及西峡三流域进行率定,采用以子流域为计算单元的流域水文模型和分布式单位线计算方法,率定小流域单位线,得到Tqmax与LLPfmax之间的线性关系及单位线几何形状的概化方法。将该方法应用于裴河流域,结果表明该方法拟合度较高,可为无资料流域的水文预报与分析提供参考。Synthetic unit hydrograph(SUH)is a widely accepted tool in hydrological analysis and hydrological forecast in ungauged basins.In order to enrich the SUH method,a new basin characteristic was established,which is defined as area-length/slope function(f-LLP).The relationship between the time to peak of UH(Tqmax)and the LLPcorresponding to the maximum value of f(LLPfmax)was analyzed.With the help of generalized UH’s shape,the complete UH was derived.Baitugang,Louzigou and Xixia basins were used for calibration.By using the watershed hydrologic model with sub-basins being computation units and the method deriving distributed UH,the UH’s of sub-basins were derived so that the generalized UH’s shape and the liner relationship between Tqmaxand LLPfmaxwere obtained.Experience was performed in Peihe basin with a high degree of fitting being obtained.It is concluded that the method presented can been used as reference for hydrological analysis and hydrological forecast in ungauged basins.

关 键 词：无资料流域 综合单位线 峰现时间 流域特征 

分 类 号：TV121.2[水利工程—水文学及水资源]