Figures index

From

Hydrogeological Characterization and Hydrodynamic Behaviour of the Overexploited Diass Aquifer System (Senegal) Inferred from Long Term Groundwater Level Monitoring

Diakher Hélène MADIOUNE, Moctar DIAW, Ibrahima MALL, Philippe ORBAN, Serigne FAYE, Alain DASSARGUES

American Journal of Water Resources. 2020, 8(3), 104-117 doi:10.12691/ajwr-8-3-1
  • Figure 1. Geomorphology of the Diass horst zone
  • Figure 2. ‘Standardized Precipitation Index’ from 1931-2016
  • Figure 3. Hydrogeological map presenting the top main aquifers (a) and a cross section of the study area AA’ (b) (modified from [17])
  • Figure 4b. Evolution of daily pumping rate for urban drinking water from the Diass system
  • Figure 5. Water level monitoring network,location of pumping fields, major faults and cross sections (A, B, C) used for interpreting geological configuration
  • Figure 6. Piezometric heads and main groundwater flow directions in the Palaeocene (a) and Maastrichtian aquifers (b) in July 2019
  • Figure 6’. Groundwater contour in the Palaeocene (a) and Maastrichtian aquifers (b) in July 2019
  • Figure 7. Spatial distribution of the groundwater level monitoring network (a), evolution in time of the measured piezometric head with pumping rate in Sebikotane (b), Northern Pout (c), Southern Pout (d), Diass (e) and Mbour areas (f)
  • Figure 8. Conceptual scheme of the groundwater flow patterns in the horst aquifer system
  • Figure 9. Evolution of the piezometric level on both sides of the faults: Sébikotane fault between the Sébikotane and Nothern Pout compartments (a) and between Sébikotane and Diass compartments (b) Pout fault between the Maastrichtian of Diass and the Palaeocene of Southern Pout (c), the Maastrichtian of Diass and that of Southern Pout (d), the Maastrichtian of Diass and the Paleocene of Mbour and the Maastrichtian of Diass and that of Mbour (e); Thies fault in the North (f) and South of the system (g)
  • Figure 10. Evolution of the piezometric heads with pumping from 1959 to 2019 (a) Evolution of piezometric heads with time; (b) evolution of pumping rate with time: I = Steady state period, II = Transient period (1) (2) (3) are respectively considered as stress periods 1, 2 and 3 of the transient period