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Tucson Recharge with Existing Potable Water System

by Richard A. Randall, CH2M Hill Inc, United States,



Document Type: Proceeding Paper

Part of: Artificial Recharge of Ground Water

Abstract:

In 1987, a study was undertaken to evaluate the potential for using the City of Tucson's existing potable water distribution system and production wells for recharge of treated Colorado River water. The water will be delivered to Tucson in 1991 as a part of the Central Arizona Project (CAP). The basic approach was to identify appropriate wells, estimate their recharge rates, determine the carrying capacity of the distribution system, compare the recharge capacities of the wells and the distribution system, determine annual recharge volumes, and evaluate requirements for retrofitting wells for injection operations. The study area was limited to pressure zones that will be served with CAP water by gravity. The potential capacity of the distribution system for recharge volumes was estimated to be 109,100 acre-feet for the year 1995. In selecting equipment, criteria that must be considered include the capability to recharge water through the well without entraining air and the operational and maintenance requirements necessary to mitigate clogging effects. Well and piping configurations necessary for efficient recharge and redevelopment operations were reviewed. Additional study results are discussed.

Subject Headings: Water supply systems | Wells (water) | Water supply | Drinking water | Injection wells | Water treatment | Rehabilitation | Arizona | United States | Colorado River

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