GIS技术在水力学模型构建中的应用

Application of GIS Technology on the Construction of Hydraulic Modeling

以无结构不规则网格水力学模型和ArcGIS软件为例,介绍了GIS技术在水力学模型构建的数据前处理中的应用,包括网格拓扑关系的建立、网格高程和建筑物面积属性提取、道路高程和宽度的提取、河道宽度及河段上下游关系提取等的方法和技巧,充分利用软件中的分析工具,避免了手工逐一提取存在的耗时和误差问题,为提高水力学模型构建效率和准确性提供了参考。

Taking hydraulic models with unstructured irregular meshes and ArcGIS software as example, the application of GIS technology on the construction of hydraulic model is introduced, including topological relationship building for meshes, extraction of elevation and building areas in meshes, elevation and width of roads, as well as upstream and downstream relationship calculation of different reaches, etc, By using existing analysis tools in the software, the methods and techniques can avoid the problems of time consuming and error which are unavoidable when extracting attributes manually. It also provides reference for improving the efficiency and accuracy of hydraulic modeling.