This study aims to identify human uses and activities in the watershed Aghien lagoon in nine rural communities located downstream, near the lagoon in rural area, and upstream of the lagoon in the urban area. A sample of two thousand two hundred fifty eight (2258) households is selected by the cluster sampling technique to three degrees. To these persons, a survey was administered. An interview guide was submitted to the various economic operators of these areas. The results show that the lagoon is used by localities near the lagoon for the dishes, laundry, bathing and swimming for more than 80% of households. This resource is also used for fishing, transport, irrigation, consumption and defecation but at low levels and as a receptacle for garbage. In the villages bordering the lagoon, the main economic activity is agriculture, unlike trade in upstream urban areas.

The aim of this paper is to highlight the impact of anthropization on the runoff Djibi and Bete rivers, tributaries of the Ivorian Aghien watershed. The classification method with the maximum likelihood used to the diachronic study of satellite imagery Landsat Thematic Mapper (1987), Enhance Thematic Mapper Plus (2000) and Operational Land Imager (2015) and Geographic Information System remote sensing has been applied. It has permitted to note the total disappearance of the forest at risk of subsistence crops, fallows, habitats and bare soils. The forest area that was 4 ha in 1987 for the Bete Watershed has been destroyed entirely. This change in the land cover between 1987 and 2015 had considerable consequencies on the