Fig. 3.

‘Length–Area’ dataset from ca. 22,000 river basins in Bhutan Himalaya as a function of basin shape. Colour code is for the Gravelius compacity coefficient¹⁹ (GC, see Fig. 2). Inset is a blow-up for basins between 1 and 2 km². Black lines a–d represent the best fit obtained for subsets based on class intervals of GC [1.25–1.35], [1.45–1.55], [1.65–1.75] and [1.85–195], respectively