Diagnostic of the factors reducing the storage capacity of the Toukomtore dam in Burkina Faso

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Résumé

The Toukomtore dam in Burkina Faso was built as a road embankment to meet the water needs
of the populations of the commune of Koubri. The dam's watershed is not immune to the various
climatic and anthropogenic pressures that have caused it to fill up. The objective of this study is
to identify the sources of sediment supply to the dam. To do this, the study relies on
documentary research, individual interviews with agents of the deconcentrated technical services
of the State and users as well as field observations. The results of the study reveal that the
sediments in the dam basin come from intense gullying areas, bare areas, bank erosion, market
gardening plots and local drains, but also from aggregate extraction sites and brick factories. The
results also show that the basin of the dam has lost its initial capacity of reception due to the
phenomenon of filling. These results provide indicative elements on the potential origin of the
sediments of the dam and are useful for the implementation of the recommendations that have
been formulated.

Mots-clés

Burkina Faso, Dam, Dam filling, Sediment, Erosion