Determine the storage coefficient Problem A confined aquifer is 25 m thick. 14 x 103 m3 of water is produced over a 2 km2 area by pumping from wells that lower the piezometric surface by 8 m. Determine the storage coefficient A 0.00003-0.00006 B 0.00006-0.0001 C 0.0001-0.0005 D 0.0005-0.001 E 0.001-0.002 Determine the specific storage (in m-1) Determine the fraction of this yield attributable to compressibility of the aquifer skeleton if the porosity is 0.3 A 0-20% B 20-40% C 40-60% D 60-80% E 80-100% From Mays, 2011, Ground and Surface Water Hydrology