A drain of rectangular shape, b= 5.4m, d= 1.2m, S= 1* 10. Resize a new dimension for the drain so that it can carry a larger discharge up to 7m³/sec. Also calculate the percentage of the increase in discharge, use n= 0.035.

Refer to Figure 7.24. The following data were collected during the field permeability 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