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Runoff erosion contro for sustainable water supply in Niamey, Niger

Congress: 2008

Keyword(s): erosion control, river Niger flow, CUN (Niamey Urban Communality)
AbstractTitle: Runoff erosion control for a sustainable water supply in Niamey, Niger Republic ISSOUFOU Abdoulkader FACOM, Save the Children Tessaoua, Niger Tel: +227 96 55 18 25 Abstract: Runoff erosion is very noxious to the soils and their use especially in semi-arid countries, and controlling it represents a day-to-day preoccupation of people and governments. The flowing water erodes farms and destroys infrastructures. Also, overland flow transports silts and deposits them into depression. This silting is one of the most important causes of the reduction of the river Niger flow. As well, the river Niger serves as the source of domestic water supply of Niamey and other riverside towns and villages. So, for protecting this river, the riverside living people, the Niger Republic and the Niamey Urban Communality (CUN) governments, adopt a number of measures to control runoff erosion so as to guaranty three million cubic meters of domestic water needs of only few days. They use mostly structural and/or agronomic methods. This work examines the control measures in Niamey Township from 2002 to 2007. The methodology used includes interviews with the local population, technicians and engineers handling the erosion control activities. Some field investigations are also undertaken for determining the sediments caught upstream of the constructions, and for viewing the effectiveness of the control measures. After a critical examination of the techniques implemented, it comes out that not all are effectively constructed. The efficiency of any erosion control measure is conditioned by the total involvement of the local population. There is, therefore, a need of for large-scale campaign to enlighten the people on the importance of the control activities so as encourage them to fully participate in the control work and in maintaining the existing constructions.
2011 IWRA - International Water Resources Association - - Admin