Floods (2) Evidence (2) Causation (2) Soils (2) Causalidad (2) Suelos (2) Causalité (2) Évidence (2) Sols (2) Niger (2) ruissellement (1) inondation (1) Ouest (1) Dynamics (1) Deterioration (1) Preservation (1) Conservation (1) Casualties (1) Assaying (1) Indexes (1) States (1) Spectacular, The (1) Winds (1) Wind erosion (1) Villages (1) Television plays (1) Sand dunes (1) Sahel (1) Runoff (1) Rain and rainfall (1)