Fig. 3
From: Fragmentation of Chilean Andean rivers: expected effects of hydropower development
Examples of different levels of fragmentation for river network shown in Fig. 1. For case a we have ∑iIFI(i) = 1/9 = 0.111, then FI=1–1.5− 0.111 = 0.04; Likewise for cases b, c, d and e and we have respectively FI = 0.16, FI = 0.20, FI = 0.24, FI = 0.49