Page 127 - CIWA Water Data Revolution Overview Report
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Figure 14: Sample WA output showing resource base sheet of long term (2003-2023) WA
indicators for Zambezi Basin.
The Zambezi Basin had significant inter-annual variability in its water accounts over the years
(Figure 15). Severe droughts in 2005, 2016, and 2023 significantly affected water availability,
with reduced rainfall and extremely low utilizable outflows recorded, particularly in 2023,
which marked the lowest utilizable outflow of the entire period. On the other hand, wet
conditions in 2007, 2010, and 2022 were characterized by high rainfall and increased water
availability. Highest rainfall was recorded in 2022, with an accompanying rise in actual
evapotranspiration, despite a sharp decline in surface water outflows.
1600
1400
1200
1000
km3/year 800
600
400
200
0
200320042005200620072008200920102011201220132014201520162017201820192020202120222023
Rainfall Utilisable Outflow Surface Water Outflow Actual ET
Figure 15: Inter- annual variability of water accounts-Zambezi basin (2003-2023).
