Figures index

From

Hydrogeological Characteristics and Geophysical Study of Base Aquifers in the Island of Grande Comore: Implications for Water Resources and Saline Intrusion

Ayouba Mmadi, Axel Laurel Tcheheumeni Djanni, Huguette Christiane Emvoutou, Abdoul Aziz Oubeidillah, Serigne Faye

American Journal of Water Resources. 2024, 12(4), 120-133 doi:10.12691/ajwr-12-4-2
  • Figure 1. Situation of the Grande Comore (Ngazidja) and study areas
  • Figure 2. Resistivity and conductivity
  • Figure 3. La Grille relief profiles showing the ERTs and boreholes (Chezani ERT (1a) and VES20; Wella ERT (1b) and VES5 and Batsa ERT (1c) and VES6. These profiles show alternating basalt and the sub-surface strata are disturbed and show clear contrasts of various faults visible in the panels, which also show disturbed strata cut by local faults
  • Figure 4. The relief profiles of La Grille representing the ERTs and VES4: Chamlé (2a) and VES4; Ivembeni (ERT) (2b) and VES16 and Dimadjou ERT (2c) and VES22, show very heterogeneous values at altitude and at the base, with often thick basalt layers at sub-surface and sub-recent levels
  • Figure 5. The Karthala relief profiles show ERT (3a) and VES21, the ERT (3b) panel and VES8 Vouni. These profiles show alternating basalts and sub-superficial strata, marking contrasts and various visible faults. The panels also show disturbed strata, trenches and through local faults
  • Figure 6. Badjini panels ERT (4a) VES32 from Inane and ERT (4b) and VES29 from Dzahadjou and panel ERT (4c) and VES30 from Midjendjeni. These profiles indicate the alternating basalts and altered strata of Midjendjeni, Mohoro, Ouropheni and Madjoma and Inane along the respective slopes in this Badjini massif. The data show aquifer continuity in the same massif from upstream to downstream
  • Figure 7. IDW-Spatialization of electrical conductivity of basal aquifers on Grande Comore Island
  • Figure 8. Interpretation of hydrogeological models a) La Grille, b) Karthala and c) Badjinii