transport de solides (1) sédiment (1) ruissellement (1) fleuve (1) Afrique du Nord (1) irrigation (1) production d'énergie (1) Afrique (1) Water (1) Transports (1) Storage (1) Sediment transport (1) Runoff (1) Rivers (1) Irrigation (1) Impact (1) Evaluation (1) Drinking water (1) Dams (1) Tax assessment (1) Africa, North (1) Storage (1) Number (1) Irrigation (1)