Summary
This comprehensive review synthesises over 30 years of remote sensing applications for monitoring surface water systems across Africa, a continent with some of the world's largest freshwater systems yet amongst the least hydrologically studied. The authors demonstrate how Earth observation addresses critical data gaps in regions with sparse ground-based monitoring networks, and discuss how integration of multiple satellite sensors with hydrological models enables improved understanding of water cycles under climate and anthropogenic pressures. The paper positions emerging missions such as SWOT as game-changers for comprehensive continental-scale water resource management and climate adaptation.
UK applicability
Whilst focused on African hydrology, this review's methodological framework for satellite-based water monitoring and integration of remote sensing with hydrological models may inform UK approaches to monitoring water resources in data-sparse regions and developing early warning systems for flood risk. The paper's emphasis on multi-sensor approaches and model coupling has relevance to UK water resource management under climate uncertainty.
Key measures
Remote sensing datasets and satellite observations of surface water extent, river discharge, water level, and hydrological variables across African river basins; comparison with gauged station data where available
Outcomes reported
The study reviewed three decades of remote sensing advances for monitoring African surface waters and their hydrological processes. It assessed current monitoring capabilities and future opportunities through upcoming satellite missions such as SWOT for water resource management and flood risk prevention.
Topic tags
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