水资源与水工程学报2017，Vol.28Issue(6)：8-13,6.DOI:10.11705/j.issn.1672-643X.2017.06.02
基于DEM和ArcGIS的浐灞流域水文特征提取研究
Research on hydrological characteristics extraction of Chanba Basin based on DEM and ArcGIS
摘要
Abstract
Based on DEM data in ArcGIS environment, the gradient, topographic features of the slope in Chanba basin, the flow direction, river network density and the number of rivers under different water catchment threshold were extracted. The results showed that the relation between drainage threshold and drainage density or watershed area followed a power-exponential function, and the higher the threshold value was, the sparser the network was. The optimum threshold value of the basin was 8000, which de-termined by the second order derivative, which avoided the subjective randomness. The best threshold of river network was extracted by ArcGIS nested software TauDEM, and the river network was stratified by Strahler method. The extracted river network matches well with Chanba natural water system. The topog-raphy and hydrology characteristics of the basin are in line with the general situation of the basin, which can be used as hydrologic model parameters directly to provide data support for the ecological environment management of Chanba River Basin. The method improves the efficiency of the hydrological model, and has the advantage of high precision and low cost.关键词
DEM/ArcGIS/水文特征/河网提取/集水阈值/浐灞流域Key words
DEM/ArcGIS/hydrological characteristics/extraction of stream network/drainage area threshold/Chanba River basin分类
天文与地球科学引用本文复制引用
姚炳光,周维博..基于DEM和ArcGIS的浐灞流域水文特征提取研究[J].水资源与水工程学报,2017,28(6):8-13,6.基金项目
中国地质调查局地质调查项目(12120113004800) （12120113004800）
