Constructing dataset of classified drainage areas based on surface water-supply patterns in High Mountain Asia

The High Mountain Asia (HMA) region is a geographical unit, holds the largest reservoir of glaciers and snow outside Earth poles. Four datasets were thus obtained: Glacier- and Stream-fed Drainage Area (GSDA), Glacier-fed and stream-free Drainage Area(GDA), glacier-free and Stream-fed Drainage Area(SDA), and the Glacier- and Stream-free Drainage Area (NGSDA), with the numbers of 87, 107, 32, and 448 separately. The statistical results show GSDA has the largest surface area, accounting for 82.2% of the total basin area in HMA, mainly in the region of the outflow basin. Dominated by small basins, the GDA area accounts for the smallest surface area, only 3.86% of the total, the SDA accounts for 5.62%. For NGSDA, most of these are with small areas, accounting for 8.32%, and mainly distributes in the inflow basin of the Qiangtang Plateau.