ABSTRACT
ArcGIS to provide hydrological analysis module is mainly used to create a surface water sport model, secondary analysis of surface water from where and to flow where the reproduction of the flow process of the water. The same time, through the application of hydrological analysis tools can also help to understand the basic concepts and key processes some of the drainage system and surface water flow process, and how ArcGIS hydrological analysis tools to get more hydrological information from the DEM data.
Based on the above research, the paper first analyzes the background and significance of the subject of this article, then introduces how to use ArcGIS hydrological analysis module to extract and study Yuanmou County watershed.
This paper focuses on extraction step described in detail, each step accompanied by a relevant picture to supporting research, the main use Arcgis9.3Hydrology hydrological processing tools package to extract the DEM river network Yuan mou counties basin analysis, described the basic principles of the river to generate experimental and Yuan mou County study area. Hydrology hydrological research successfully should ArcGIS9.3 to software processing toolkit and DEM Yuanmou County river basin hydrological information extraction. After comparative analysis, Hydrology hydrological processing toolkit and DEM extraction of river space distribution and the actual relatively consistent. DEM extraction of hydrological information to fully enhance the work efficiency at the same time guarantee the accuracy of information extraction, which has great significance for the construction of the digital watershed, agricultural engineering, planning and water resources management and so on.
Keywords: Hydrology model, hydrological analysis, DEM ,Information extraction