pump system: PS2-1800 C-SJ3-18
flow rate: 4.2 m³/day
total dynamic head (TDH): 80 m
solar generator: 1.8 kWp
Pejeh sowa Chiefdom
Sierra Leone
Brunnenbau Conrad
July 2022
The drilling operation was successful, and a total depth of 80 m was drilled. Fractures were observed between 42 – 60 m. The entire boring was lined with a 127 mm (5 inches) PVC casing. Five screen and 15 blind casing were installed. Two hours borehole development was done to expel all contamination and finer particles.
Pumping test was conducted to determine the yield and productivity of the well. The design consisted of 8 hours pumping at 1.2 L/s constant discharge rate with a two-hour recovery. Model results show a medium value of Transmissivity and Storativity (Specific yield) and a Specific capacity of 0.03 L/ms. these values suggest a medium productivity aquifer which can adequately supply the school community and its surrounding. Also, analysis of sample of water collected from the pumping test revealed that the water is safe and free of contamination
