"河北省不同分辨率DEM河网与流域特征提取分析"

rcGIS to extract the river network and watershed features. The main processes include DEM preprocessing, river network extraction, and watershed extraction. Through analysis, the study obtained the characteristics of river network and watershed under different resolutions in the study area. Keywords: horizontal resolution, raster DEM, river network, watershed extraction. The study focuses on the extraction and analysis of DEM river network and watershed in the Luanhe River basin in Hebei Province, using DEM data with resolutions of 30 meters and 90 meters. The study utilized the ArcGIS geographic information system software developed by ESRI for the extraction of river network and watershed features. The main processes involved in the study were DEM preprocessing, river network extraction, and watershed extraction. By analyzing the data, the study was able to identify the characteristics of the river network and watershed at different resolutions in the study area. The key findings of the study provide valuable insights into the impact of resolution on the extraction of river network and watershed features. This information is crucial for understanding the hydrological processes in the study area and can be used to support future studies and decision-making processes related to water resource management in Hebei Province. Overall, the study highlights the importance of considering the resolution of DEM data when extracting river network and watershed features. The findings of the study contribute to the growing body of knowledge on hydrological analysis and provide valuable information that can be used to improve water resource management practices in the Luanhe River basin and other similar regions. The study demonstrates the effectiveness of using ArcGIS software for extracting and analyzing river network and watershed features and underscores the significance of resolution in accurately representing topographic features in hydrological studies.