7.22 Refer to Figure 7.24. The following data were collected during the field per- meability measurement of a confined aquifer using a pumping test. Determine the hydraulic conductivity of the permeable layer. Use Eq. (7.49). Thickness of the aquifer, H = 4.5 m Piezometric level and radial distance of the first observation well: h₁ = 2.9 m; r₁ = 17.8 m Piezometric level and radial distance of the second observation well: h₂ = 1.8 m; r₂ = 8.1 m Rate of discharge from pumping, q = 0.5 m³/min q logo k (7.49) 2.727H(h, h₂) dr Piezometric level during pumping Impermeable layer Confined aquifer Test well Observation wells Figure 7.24 Pumping test from a well penetrating the full depth in a confined aquifer Piezometric level before pumping h dh THA