POLITECNICO DI TORINO Estimating Sediment Transport in the Mogtedo
POLITECNICO DI TORINO Corso di Laurea Magistrale in Ingegneria Civile Tesi di Laurea Magistrale Estimating sediment transport in the Mogtedo watershed, Burkina Faso Relatore Candidato prof. Paolo Vezza Luca Toso Corelatori prof. Carlo Vincenzo Camporeale prof. Velio Coviello (Libera Università di Bolzano) A.A. 2017/2018 Abstract Estimating sediment transport in the Mogtedo watershed, Burkina Faso Luca Toso Politecnico di Torino, Department of Environment, Land and Infrastructure Engineering-DIATI Corso Duca degli Abruzzi 24, Torino, Italy In the Sahelian region the annual rainfall is only concentrated in a short period of the year, named wet season, where many heavy rains occur and cause floods. The intensity of rains doesn’t permit the infiltration of water, which rapidly flows away, so that paradoxically rainfall is one of the main causes of soil impoverishment and erosion. Many small dams were built in Burkina Faso to store water from the wet season to be used in the rest of the year, expecially for irrigation. However, storage capacity of these dams is decreas- ing as a consequence of sediment trasport from the rivers which provide water to the dams, with a phenomenon called siltation. As a consequence of the climate change, the amount of annual rainfall has decresed and dry periods has become longer, worsening the living conditions of the inhabitants. In the present study some sediment transport data collected by the PADI project in Mogtedo catchment, were there is small dam, were analyzed. Some sediment transport formulas were tested on field data, six of them for total load, three for suspended load and three for bedload.
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