Design of a Spatial Information System for the Management of Drinking Water Supply Boreholes in the Departments of Yamoussoukro and Toumodi (Central Cote d’Ivoire)

Drinking water is an indispensable commodity for the life and development of the community. Despite the efforts made by the Ivorian government, much remains to be done to relieve the population. The satisfaction of such a need requires detailed and reliable information on the availability of groundwater. This study aims to design a database to manage the drinking water supply projects of the departments of Yamoussoukro and Toumodi from boreholes. The methodological approach used in this study is that of a relational database combining attribute and spatial data. The result of this work is a user-friendly interface that facilitates consultation and data entry on the boreholes. Spatial and statistical analyses show an uneven distribution of boreholes throughout the study area. Furthermore, all the boreholes in these two departments have flow rates classified as low and the most productive alteration thicknesses are between 15 and 30 m. The optimal depth of drilling in this area can be defined between 60 and 90 m. Finally, it appears from this analysis that, among all the lithological formations in these departments, the shales are the most productive. This database constitutes a real decision support tool for managers for the planning and evaluation of drilling.