This dataset contains flow data for the entire Yellow River basin, including its upstream, midstream, and downstream sections, with a flow threshold of 15,000.
The main purpose of flow accumulation analysis is to determine the path of water flow. Based on the flow direction raster map, a flow accumulation raster map is generated, where the value of each cell on the flow accumulation raster represents the total number of raster points flowing into that cell from the upstream catchment area, i.e., the number of inflow paths (NIP) converging into that cell. Areas with a larger NIP can be considered valleys, while areas with an NIP of zero are higher locations, potentially representing watersheds within the basin. The basic idea of flow accumulation analysis is to assume that each point on a DEM represented by a regular grid has a unit volume of water. Following the natural flow of water from high to low areas, the water volume flowing through each point is calculated based on the flow direction raster of the region, resulting in the flow accumulation raster (flow accumulation amount) for the region.
Produced independently, the spatial resolution of the original topographic slope dataset for the Yellow River basin is 30 meters.
Extracted using the Hydrology software tool.
This dataset has been corrected using DEM, with both horizontal and vertical accuracies being less than one pixel.
This work is licensed under
CC BY 4.0 (Creative Commons Attribution 4.0 International License).
CSTR:11738.11.ncdc.nieer.2020.1676
10.12072/ncdc.NIEER.db0016.2020
