TY  - Data
T1  - Data set of hydrological factors in the Weihe River Basin
A1  - Zhang Yaonan
DO  - 10.12072/ncdc.WRiver.db0003.2021
PY  - 2021
DA  - 2021-09-28
PB  - National Cryosphere Desert Data Center
AB  - 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.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/40e2ab9b-3674-4b66-848d-3c975a1bc778
ER  -