Fig. 1: Transboundary water scarcity at monthly scale in 2005-2014.
From: Transboundary conflict from surface water scarcity under climate change
a Number of months in which the water scarcity index (WSI) ≥ 1. The water scarcity index is the ratio of water withdrawal to available water resources. The white areas are regions without transboundary river basins. b Distribution of water-scarce sub-basin areas (SBAs) across all continents (AF Africa, EU Europe, AS Asia, NA North America, SA South America, OC Oceania). c Distribution of water-scarce sub-basin areas in the upstream, middle-stream, and downstream parts of basins. d Number of sub-basin areas facing water scarcity in each month.
