DEFINE DATABASE : Collection and analysis database - Recognition and diagnosis of sewerage networks – RSS pollutants - Statistical analysis of rainfall recorded over Abidjan and establishment of IDF curves (Intensity - Duration -Frequency) site characteristics of the project; These curves allow the establishment of project rainfall design (return periods: 1, 2, 5 and 10 years) - Hydrological Study and watershed modelling for a total area of approximately 2 500 hectares - Hydraulic modelling of existing facilities and projected development - Topographical
Study - Geotechnical study - physicochemical Study - Analysis of sediment - Biological tested.
DRAFT: TOPOGRAPHICAL AND GEOTECHNICAL WORKS : Definition of the main structures to build and appartenant structures - Study of amenities outskirts of spillways - Evaluation of environmental and social impacts of the project - Landscape study of the project site and proposal for the dredging of part of the Bay of Cocody.
BID DOCUMENTS OF THE FOLLOWING WORKS :The merger of the two channels C1 and C2, The construction of a third Dalot in addition to two existing culverts,The raising of the walls of sections T1, T2, and T3, Concreting of the outlets of the three channels in a lagoon on a definite linear, The implementation of capping basins, The existing sewage works, Dredging of channels of lagoon outlets, Total length of the primary network : 2200 ml.