Résumé
At the heart of Sebou basin, the Saïss plain contains two superimposed and inter-communicating aquifers. These aquifers play a significant role in the socio-economic development of the region through the satisfaction of drinking water and irrigation needs. From the 80’s and with the advent of drought, this groundwater has experienced strong over-exploitation, resulting in an annual deficit of 100 million m3. This issue caught the interest of the scientific community, thus producing a large mass of dispersed and heterogeneous data which need to be integrated into a single data warehouse. Exploring of this warehouse has allowed us to assess the development of Saïss groundwater resources through maps showing the location of water points and graphic drawing up the spatial and temporal evolution of piezometry and water sources flows. Certainly, the integration of spatial and temporal data in one data warehouse, to analyze and exploit them is considered a milestone in the process of a decision support system construction. However, it still faces several constraints and limitations such as uncertainty in the various stages of the integration process. Keywords: Saïss, two aquifers, deficit, inter-communicating, integration, warehouse, uncertainties.