OKACOM, a dedicated tripartite commission, had already initiated various national plans, supported by the GEF in particular, on the human, economic, scientific and technical aspects of the CORB, the Cubango-Okavango River Basin. Among other things, these studies revealed critical gaps in our knowledge of the sedimentology of the CORB. As the basin spans three countries: Botswana, Namibia and Angola, it also requires specific skills in integrated water resource management (IWRM) (specifically requested by the ToR).

The OKACOM “Sediment Assessment study for the CORB” project therefore aimed to set up a network of hydro-sediment measurements on the CORB. Coordinated by the University of Botswana (UB), the project was led by Professor Murray-Hudson, who teaches wetland ecology at the Okavango Research Institute (ORI). Universities in the two other neighbouring countries were also involved: UNAM in Namibia and UAN in Angola.

OKACOM’s research focuses mainly on eco-hydrology to understand the dynamics of tropical wetlands driven by flooding. In addition to the potential effects of climate change, dams and water abstraction, this also includes the dynamics of nutrients in the context of potential pollution. It also looks at wetland biogeochemistry, sediment dynamics and tectonics as drivers of wetland landscapes and ecosystem services. As part of the ‘Sediment Assessment study’ project, the aim was to carry out an initial assessment of sand transport in the CORB with a view to setting up a hydro-sediment measurement network covering the entire basin in the medium term.

The international experts involved, who also acted as trainers, were: for INRAE, Benoît Camenen of the HyR team within the RiverLY unit and, for the Géosciences Rennes laboratory, Alain Crave, head of ‘Rivières’ within the ‘Eaux & Territoires’ team.

The report currently being finalised will be accompanied by an EMF that will enable OKACOM to draw up a Strategic Action Programme.

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