【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。更多还原

【Abstract】 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.更多还原