Fig. 4

Long-term historical (1951–2021) mean flow in Indian subcontinent river basins. (a,b) Mean annual and monsoon historical flow (m3/s) of selected ISC river segments. Grey colour represents the river segments having flow less than 50 m3/s. (c,d) Distribution of streams based on mean annual and monsoon flow. The x-axis is made on a logarithmic scale (log10 scale).