Effects of Groundwater Pumpage on Surface and Groundwater Flows in Adjoining Basins

摘要

The consequences were examined of possible future large-scale groundwater withdrawals from Cienega Basin, located about 40 miles southeast of Tucson, Az. Average annual recharge to groundwater calculated by an infiltration method is 19,500 acre-feet; calculated by a salt balance method it is about 15,700 acre-feet; calculated by model calibration it is about 10,700 acre-feet. Model studies show that if future pumpage is 14,000 acre-feet/year, and assuming a storage coeff. of 0.01, at the end of 20 years the cone of depression will affect virtually the entire basin and encroach on adjoining basins.