Chekirbane, A., Stefan, C., Schlick, R., Aloui, D., Mlayah, A. (2021)
Enhancing the implementation of managed aquifer recharge (MAR) technology through geospatial analysis and web-based decision support tools to cope with water scarcity in arid and semi-arid regions of Tunisia. Presentation at the 48th Congress of the International Association of Hydrogeologists (IAH2021). Brussels, Belgium, 6-10 September 2021


 

Suitability mapping for managed aquifer recharge (MAR) is recently gaining more attention because of its potential in producing comprehensive maps easily interpreted and used by policy makers. In front of the divers existing methodologies, an adapted approach for the arid and semi‐arid conditions of Tunisia was developed to generate MAR suitability and feasibility maps within a participatory approach with stakeholders. A GIS‐based multi‐criteria decision analysis (MCDA) was applied to establish the suitability and feasibility of MAR in Enfidha plain, NE of Tunisia. Selected criterions were spatialized under GIS thematic layers and they were standardized based on literature and experts’ opinions regarding their importance in MAR implementation. Weights of each criterion were determined using analytic hierarchy process (AHP). Intrinsic suitability map was obtained using weighted linear combination (WLC) by the mean of ArcGIS software and via the INOWAS (Innovative web‐based decision support system for water sustainability under a changing climate) platform. It shows that more than 80% of the total plain area is intrinsically suitable and highly suitable for MAR. MAR feasibility map was established by overlaying intrinsic suitability, recharge water availability and water demand maps of the region. It reveals that almost a fifth of the plain has high MAR feasibility potential. The INOWAS DSS web‐portal is an effective tool to create, store, and share MAR suitability maps.