PROMETHEE and Geospatial Analysis to Rank Suitable Sites for Grombalia Aquifer Recharge with Reclaimed Water

Abstract

This work aims to rank the suitable sites for Grombalia aquifer recharge with reclaimed water using PROMETHEE II multicriteria analysis method coupled with Geographical Information System (GIS). The suitable sites were first defined and mapped using the disjunctive/conjunctive method. Then the suitable areas were ranked using the PROMETHEE II method. Several technical, environmental and economic criteria were identified, spatialized, weighted using the AHP method and normalized using the fuzzy functions and then aggregated using the PROMETHEE II method. The best site adapted for Grombalia aquifer recharge with reclaimed water of Bou Argoub wastewater treatment plant (WWTP) was selected. The suitable areas are about 1667 ha, exceeding by far the required area to absorb the amount of effluent produced by the wastewater treatment plant of Bou Argoub. The net flux φ obtained to rank the suitable areas varies between −0.33 and 0.32. The best site is located 3.6 km far from the WWTP, inside an agricultural area and having 9 m unsaturated zone thickness.