A ground-water study and predictive model for the town of Florence, Arizona

Abstract

Present hydrologic, hydrogeologic, and water quality conditions were evaluated for an area in and anowlcitbe town of Florence, Arizona. Technical reports and documents were reviewed, and all available data were stored in a data base management system. A predictive model was used to determine the effects on future ground-water quantity and quality due to changes in pumpage. Hydrographs for the study area show a recent increase in water levels. Along with the computer simulation results, this suggests that water quantity should not be a problem for Florence for a number of years. The simulation results indicated that after 40 years, there would be a general decline in water levels and a cone of depression south of the town would be enhanced. Two areas of nitrate contamination were discovered east and northeast of Florence but should not affect the town wells, as long as the contaminated ground water continues to flow to the south.