article · Reviews of Geophysics
This research synthesises historic and ongoing studies on the hydrology of the Congo Basin. Basin rainfall varies from 1900 millimetres per year along an east to west belt down to 1100 millimetres per year towards the north and south, while potential evapotranspiration remains largely uniform across the region. Publicly accessible river discharge records now span 96 gauge sites, showing a 21 percent surge in river flow at Kinshasa-Brazzaville during the 1960 to 1970 decade. Satellite altimetry reveals that shallow waters in the Cuvette Centrale wetland sit 0.5 to 3.0 metres higher than the adjacent Congo River, resulting in diffusive flows. Furthermore, these wetland waters release roughly 0.5 petagrams of carbon dioxide and methane equivalents annually, contributing notably to global carbon emissions. These insights frame several hypotheses concerning runoff origins, deforestation, hydroelectric generation, and climate change interactions.
The Congo Basin represents one of the world's most critical yet under-monitored hydrological systems. Clarifying how its wetlands regulate water movement and release greenhouse gases helps scientists and policymakers understand regional water cycles, evaluate vulnerability to climate shifts, and better anticipate the broader environmental consequences of deforestation and future hydroelectric developments.
The abstract reflects early-stage foundational review and scientific hypothesis generation rather than applied technology. The compiled discharge datasets and wetland dynamics may eventually assist hydroelectric power developers, water resource authorities, and environmental carbon accounting services in regional planning. However, because no specific tools, products, or implementation frameworks are tested, the work remains distant from direct commercial application.
AI-generated from the published abstract. Always read the original work before citing.
We review the published results on the Congo Basin hydrology and summarize the historic and ongoing research. Annual rainfall is ~1900 mm/yr along an east-west trend across the basin, decreasing northward and southward to ~1100 mm/yr. Historic studies using lysimeters, pans, and models suggest that the annual potential evapotranspiration varies little across the basin at 1100 to 1200 mm/yr. Over the past century, river discharge data have been collected at hundreds of stream gauges with historic and recent data at 96 locations now publicly available. Congo River discharge at Kinshasa-Brazzaville experienced an increase of 21% during the 1960–1970 decade in comparison to most other decades. Satellite altimetry measurements of high and low flows show that water levels in the “Cuvette Centrale” wetland are 0.5 m to 3.0 m higher in elevation than the immediately adjacent Congo River levels. Wetland water depths are shallow at about a meter and there does not appear to be many sizable channels across the “Cuvette”; thus, wetland flows are diffusive. Cuvette waters alone are estimated to emit about 0.5 Pg CH4 and CO2 equivalents/yr, an amount that is significant compared to global carbon evasions. Using these results, we suggest seven hypotheses that focus on the source of the Cuvette waters and how these leave the wetland, on the river discharge generated by historic rainfall, on the connection between climate change and the rainfall-runoff generated by the migrating “tropical rainbelt,” on deforestation and hydroelectric power generation, and on the amount of carbon emitted from Congo waters.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1002/2016rg000517
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
