摘要
以地理信息系统软件ArcGIS 10.0为平台,探讨了其水文分析模块在流域划分、地形分析、河网提取上所采用的算法和原理。并以三川河流域为例,基于数字高程模型(DEM)数据,详述了提取流域特征的方法和步骤,实现了流域边界、坡度、坡向、表面曲率及流域河网的自动提取。结果表明:上述成果均能较好地吻合流域的实际情况,该方法具有操作简单、灵活方便、成果精度高、提取速度快等特点。流域特征的自动提取为进一步研究水土保持、水文模型、流域规划及数字流域等提供了基础数据,具有重要的实际意义。
Taking the Arcgisl0. 0 of GIS software as a platform, the algorithm and principle ot hyclrologlcal anakyuc model including watershed division, terrain analysis, river network extraction, are discussed. Sanchuan River Basin is taken as an example, based on the digital elevation model （DEM） data, methods and steps of automated extraction of basin characteristics are detailedly introduced, basin characteristics such as basin boundary, slope, aspect, surface curvature and river network are automatically extracted. The re sults show that the above results are fit for the actual situation o{ river basin, this method has the characteristics of simple operation, flexibility and convenience, high precision, high extraction speed and so on. Automated extraction of basin characteristics affords basic data for the further research on soil-water conservation, hydrological model, basin planning and digital basin. Thus it has an important practical significance.
出处
《中国农村水利水电》
北大核心
2013年第3期34-37,共4页
China Rural Water and Hydropower
基金
山西省河道站"山西省数字流域构建"项目
