摘要
以唐家山堰塞湖为例,利用ArcGIS中的水文分析模块处理唐家山所处的涪江流域的DEM数据,提取河网并划分子流域,然后根据堰塞湖在河网中的位置提取并计算集雨面积,再由改进的新安江模型进行洪水演进,实现对堰塞湖的灾害预测。在改进的新安江模型中,提出综合DEM划分的子流域以及雨量站的分布,计算流域面雨量的方法,以提高模型的精度。
This article takes Tangjiashan barrier lake as an example,through the hydrological module in ArcGIS,disposing DEM data of the drainage area where Tangjiashan barrier lake stood,acquiring stream net and dividing the drainage area into parts,then calculating the acreage of the rainy area and simulating the flood motion based on Xin＇anjiang model which has been ameliorated,and finally obtain flood forecasting.In order to improve the precision of the model of flood forecasting,this article puts forward a new solution which is based on DEM data and distribution of the rainfall station to calculate the acreage of the rainy area.
出处
《海洋测绘》
2010年第5期38-41,共4页
Hydrographic Surveying and Charting
