A series of biennial symposia on recharge have been held over the years and contain much useful information. Copies of the proceedings for past years are available from WRRC. Another conference document is Proceedings of the Symposium on Effluent Use Management, edited by Kenneth D. Schmidt and Mary G. Wallace (AWRA 29th Annual Conference August 29 - September 2, 1993).

Some other sources of information on recharge methods and recharge policy in the Tucson area include:

CH2M Hill. Rillito Recharge Project: An Evaluation of Recharge Techniques. Prepared for the Arizona Department of Water Resources in Cooperation With Tucson Water and Pima County Flood Control District, July 1992. Tucson water issued a series of reports on City of Tucson Sweetwater Underground Storage and Recovery Facility in 1991 and 1994. These are just a few of the many government documents on related topics.

Some theses and dissertations have provided useful information. A complete list of those from the University of Arizona's Hydrology and Water Resources Department is available on the Web site. Keith, S.J., Stream Channel Recharge in the Tucson Basin and Its Implications for Groundwater Management. The University of Arizona, Department of Hydrology and Water Resources. M.S. Thesis, 1980.

An analysis of the impacts of the Water Consumer Protection Act can be found in a paper by L.G. Wilson, W.G. Matlock and K.L. Jacobs, Hydrologic Uncertainties and Policy Implications: The Water Consumer Protection Act of Tucson, Arizona, USA. Hydrogeology Journal. Vol. 6, pp. 3-14. 1998.

Subsidence

A good general introduction to subsidence is in Steven Slaff's Land Subsidence and Earth Fissures In Arizona published by the Arizona Geological Survey, Down-to-Earth Series 3 in 1993. Another general introduction can be found in the Arroyo published by the WRRC in Summer 1992 titled "Land Subsidence, Earth Fissures Are Changing Arizona's Landscape."

The following more technical studies were published by the U.S.G.S.:

Anderson, S.R. Potential for Aquifer Compaction, Land Subsidence, and Earth Fissures in the Tucson Basin, Pima County, Arizona. U.S. Geological Survey Hydrologic Investigations Atlas HA-713. 1988.

Hanson, R.T. Aquifer-System Compaction, Tucson Basin and Avra Valley, Arizona: U.S. Geological Survey Water Resources Investigations Report 88-4172. 1989.

Hanson, R.T., S.R. Anderson and D.R. Pool. Simulation of Ground-Water Flow and Potential Land Subsidence, Avra Valley, Arizona. U.S. Geological Survey. Water Resource Investigations Report. 1990.

Hanson, R.T. and J.F. Benedict. Simulation of Ground-Water Flow and Potential Land Subsidence, Upper Santa Cruz Basin, Arizona. U.S. Geological Survey. Water Resources Investigations Report 93-4196. 1994.

Frisch-Gleason, Robin, Steven Slaff and Richard A.Trapp. Bibliography of Subsidence and Earth Fissures Within Arizona. Arizona Geological Survey Open File Report 95-8. June 1995.

Hoffman, John P., Donald R. Pool, A.D. Konieczki and Michael C. Carpenter. Investigation of the Causes of Sinks in the San Xavier District, Tohono O'odham Nation, Pima County, Arizona. U.S. Geological Survey, Open File Report 97-19. 1997.

Schumann, Herbert H. and S.R. Anderson. Land Subsidence Measurements and Aquifer-Compaction Monitoring in Tucson Basin and Avra Valley, Arizona. U.S. Geological Survey. Water Resources Investigations Report 88-4167. December 1998.

Effluent

The Winter 1997 issue of SAWARA's Waterwords, Wastewater, A Growing Resource? and the Summer 1990 issue, Special Issue on Effluent As A Water Supply provide much valuable information.

Information on the supply-related aspects of effluent can be found in:

Galyean, Kenneth C. Infiltration of Wastewater Effluent in the Santa Cruz River Channel, Pima County, Arizona. Water Resources Investigations Reports; 96-4021, 1996.

Pima County Wastewater Management Department's Tucson Water. Regional Effluent Utilization Plan. Phase A: Preliminary Regional Effluent Utilization Study. Malcolm Pirnie, Inc. February 1991 and a final report in 1995.

Grey Wilson and others studied the water quality impacts of effluent recharge in Water Quality Changes During Soil Aquifer Treatment of Tertiary Effluent. Water Resources Research, Vol. 67, No. 3, pp. 371-376. 1995.

Alternative Supplies

Information about alternative water supply and conservation strategies can be found in several issues of Arroyo, a periodical series published by the WRRC, The University of Arizona. The spring 1992 issue, "Weather Modification, a Water Resource Strategy to be Researched, Tested Before Tried," the August, 1998 issue, "Managing Watersheds to Improve Land and Water".

Chapter 4: COPING WITH FLOODWATER

An historical, if somewhat dated summary of flooding issues and information in Pima County can be found in Flooding and Erosion Hazards in Tucson, published by Southwest Environmental Service in 1980. This is out of print, but available in libraries. Two issues of WRRC's Arroyo dealt with general urban wash and flooding issues. "Often Neglected, Urban Washes Now Seen as Attractive Resource" (June 1991) and "Flood Hazards, a Concern in Desert Areas of Arizona" (June l990).