基于地貌瞬时单位线的缺资料小流域水文预报  

Predictions in Ungauged Small Watersheds Based on Improved GIUH

作　　者：邹霞[1] 宋星原[1] 袁迪[1] 刘佳明[1] 张素琼[1] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072

出　　处：《人民黄河》2015年第1期11-14,共4页Yellow River

基　　金：国家自然科学基金资助项目(51379149);国家自然科学青年基金资助项目(51209162)

摘　　要：为使水文预报结果具有更高的精度,在地貌瞬时单位线通用公式的基础上,将面雨量的不均匀性反映到面积率上,从而对初始概率作了适当的调整。另外,考虑坡面汇流相对于河道汇流具有一定程度的滞时,将坡地作为特殊的河流引入地貌瞬时单位线,保持了地貌瞬时单位线计算结构的一致性。应用结果表明:改进的地貌瞬时单位线的平均误差为6.02%,而未改进的地貌瞬时单位线的误差为14.70%。In order to get higher precision of forecast results,combined with surface unevenness of areal precipitation,the initial probability was made an appropriate adjustments. At the same time,considering a certain degree of lag time compared overland flow concentration and subsurface flow concentration with channel flow concentration,the slope as a special river was introduced to geomorphological instantaneous unit,maintaining the computational structural consistency of geomorphological instantaneous unit. The application results show that the aver-age error of improved geomorphologic instantaneous unit hydrograph is 6. 02%,which is better than un-improved geomorphologic instanta-neous unit hydrograph with average error of 14. 70%.

关 键 词：坡面汇流 面雨量 缺资料小流域 地貌瞬时单位线 水文预报 

分 类 号：P338[天文地球—水文科学]