%0 Dataset
%T Data set of hydrological factors in the Weihe River Basin
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/40e2ab9b-3674-4b66-848d-3c975a1bc778
%W NCDC
%R 10.12072/ncdc.WRiver.db0003.2021
%A Zhang Yaonan
%K DEM without depressions;cumulative runoff;water flow length;river network extraction;watershed segmentation
%X The adopted data source is DEM, which is downloaded from Geospatial Data Cloud (http://www.gscloud.cn/search), splicing multiple DEMs, cropping DEMs using vector boundaries of the Weihe River Basin, and finally obtaining DEM data of the Weihe River Basin. The hydrological analysis can determine the river direction, extract the river network, classify the river network, and extract the watershed, which mainly includes the following five parts: 1. Depression-free DEM generation: (1) water flow direction extraction; (2) depression depth calculation; (3) depression filling. 2. Confluence Accumulation Calculation: (1) Recalculate the direction of flow in the undepressed DEM; (2) Calculate the Confluence Accumulation. 3. Flow length calculations: (1) DOWNSTREAM-calculates the downslope distance along the flow path from each image to the sink or outlet on the edge of the raster; (2) UPSTREAM-calculates the longest upslope distance along the flow path from each image to the top of the watershed. 4. River network extraction: (1) River network generation; (2) Stream link generation (connection points of the river network, including the start and end points of arc segments); (3) River network hierarchy generation. 5. Basin segmentation: (1) identification of basin basins; (2) identification of catchment outlets; and (3) generation of catchment basins.