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<p>The growing need of rural populations for water remains a major concern in several regions of Central African Republic (CAR), notably for daily domestic and agro-pastoral needs. To satisfy this water demand, local populations resort to diverse water resources, of which groundwater. Thus, to enable the sustainable use of this resource contained in aquifers, the initial step is to have a cartographic decision-making tool. The present study leverages the combination of Earth Observation (EO) data, GIS-based Analytic Hierarchy Process (AHP) and in situ data to delineate and map groundwater potential zones (GWPZ) in the Mambéré-Kadéï prefecture, southwest of the CAR. Ten thematic layers resulting from the parameters influencing the recharge process were considered to identify potential recharge zones. The obtained map of GWPZ makes it possible to classify the entire area into four classes of potentiality: Low, Moderate, High and Very high. High to very high groundwater potential areas cover approximately 75% (22.388 km<sup>2</sup>) and 8.04% (2.401 km<sup>2</sup>), respectively, and are located on the consolidated sandstone formations/consolidated sedimentary aquifer in the central part of the area of interest. Areas of moderate to low potential cover approximately 11.39% (3400 km<sup>2</sup>) and 5.57% (1662.35 km<sup>2</sup>) of the area and lie beneath the Precambrian basement/ Basement aquifer/fracture – Low complex formations, much further west of the area under study. The demarcation of prone areas for groundwater in the Mambéré-Kadéï prefecture gives primary strategies for choosing new well locations and better implementation of water catchment works in the rural regions of the country.</p>

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Application of analytical hierarchy process and gis to delineate and map groundwater potential zones in Mambéré-kadéï prefecture environment, Southwest of Central Africa Republic, Central Africa

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Freddy Fiacre Gondala,
  • Salomon César Nguemhe Fils,
  • Marthe Mbond Ariane Gweth,
  • Yvonne Poufone Koffi,
  • Ibrahim Mbouombouo Ngapouth,
  • Michel Andre Pouth Nkoma,
  • Georges Nshagali Biringanine,
  • Jean M’boliguipa,
  • Philippe Njandjock Nouck

摘要

The growing need of rural populations for water remains a major concern in several regions of Central African Republic (CAR), notably for daily domestic and agro-pastoral needs. To satisfy this water demand, local populations resort to diverse water resources, of which groundwater. Thus, to enable the sustainable use of this resource contained in aquifers, the initial step is to have a cartographic decision-making tool. The present study leverages the combination of Earth Observation (EO) data, GIS-based Analytic Hierarchy Process (AHP) and in situ data to delineate and map groundwater potential zones (GWPZ) in the Mambéré-Kadéï prefecture, southwest of the CAR. Ten thematic layers resulting from the parameters influencing the recharge process were considered to identify potential recharge zones. The obtained map of GWPZ makes it possible to classify the entire area into four classes of potentiality: Low, Moderate, High and Very high. High to very high groundwater potential areas cover approximately 75% (22.388 km2) and 8.04% (2.401 km2), respectively, and are located on the consolidated sandstone formations/consolidated sedimentary aquifer in the central part of the area of interest. Areas of moderate to low potential cover approximately 11.39% (3400 km2) and 5.57% (1662.35 km2) of the area and lie beneath the Precambrian basement/ Basement aquifer/fracture – Low complex formations, much further west of the area under study. The demarcation of prone areas for groundwater in the Mambéré-Kadéï prefecture gives primary strategies for choosing new well locations and better implementation of water catchment works in the rural regions of the country.