【摘要】 尼洋河流域位于藏东南地区,由于受到来自印度洋季风的影响降水充沛,流域内海拔高差大,降水形式主要是降雨和降雪,尼洋河汛期主要集中在5~9月份,特别是5月份积雪大量消融,使得融雪径流在径流总量中占有相当重要的比例。采用融雪径流模型(SRM)对尼洋河2007年及2008年降水径流进行模拟。结果表明,SRM模型在水文气象基础资料相对缺乏的尼洋河流域有着较好的模拟精度,两年平均拟合确定系数R~2为0.776,平均体积差异系数D_v为6.219%。模型充分利用了流域积雪覆盖遥感数据,成为在以融雪径流为主而基础水文气象资料又相对缺乏流域应用的一大优势。更多还原

【Abstract】 The Niyang River basin is located in the southeastern Tibet,where has abundant precipitation under the influence of the Indian monsoon.There are huge difference between the elevations in the basin.The precipitation is mainly contributed by rainfall and snowfall.The Niyang River flood season is mainly concentrated from May to September,especially the snow cover largely melts in May that makes the snowmelt runoff account for a significant proportion of the total runoff.This paper applied the snowmelt runoff model(SRM) to simulate the precipitation of the Niyang River in 2007 and 2008.The results indicate that the SRM model has good simulation accuracy in the Niyang River basin,where are relatively lacking of hydrological and meteorological basic data.The two-year average fitted coefficient R~2 is 0.776 and the average volumetric difference coefficient D_v is 6.219%.The model makes full use of the remote sensing data of snow cover in the basin,which is a major advantage in the application of hydrological and meteorological data based on snowmelt runoff.更多还原