Fig. 2: Prevalence of potentially losing and gaining rivers across Brazil.
From: Widespread potential for streamflow leakage across Brazil
a Red lines represent stream reaches where the majority (>50%) of nearby wells have water levels that lie below the stream surface. Blue lines represent stream reaches where half or less-than-half (≤50%) of nearby wells have water levels that lie below the stream surface. Most of the losing rivers are in drylands or in regions with strong agricultural activity as indicated in the subplots: São Francisco Brazilian Water Resources Management Units (b), Verde Grande Water Resources Management Units (c). Only rivers with at least one well per 100 km of length are classified as potentially losing and gaining rivers.
