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YAVAPAI COUNTY WATER ADVISORY COMMITTEE Files

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Big Chino Sub-basin Historical and Current Water Uses and Water Use Projections

This study was initiated to address two water related questions about the Big Chino sub-basin. The first of these concerns the right associated with certain lands to transfer water out of the Big Chino Sub-basin to the Prescott AMA. According to Arizona Revised Statutes, § 45-555, lands that were irrigated with groundwater at any time between January 1, 1975 and January 1, 1990 are eligible for a right to transfer up to 3 acre-feet per acre retired to the Prescott AMA. To date, lands irrigated during this time period have not been comprehensively identified. Document prepared by the Yavapai County Water Advisory Committee. View Document.

Central Yavapai Highlands Water Resource Management Study

The Central Yavapai Highlands Water Resource Management Study (CYHWRMS) reports can be downloaded here.

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CYHWRMS Status Report January 2009

Presentation given to CWAG meeting describing the current status of the CYHWRMS study. By Ken Janecek, CWAG Board member. View Document.

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Laurie Wirt Presentation

Semiarid Big and Little Chino valleys are undergoing rapid growth, their populations solely dependent solely on ground water. Although the basins contain considerable amounts of ground water, from a historical perspective, groundwater overpumping in excess of safe yield inevitably leads to reduction or loss of perennial streams. The source of base flow to the Upper Verde River is the discharge from two basin-fill aquifers---the Big Chino basin-fill aquifer and the Little Chino basin-fill aquifer. Maintaining this discharge is critical toward maintaining base flow in the upper Verde River which is in turn critical for to maintain base flow for grandfathered downstream surface-water users in Verde Valley and Phoenix as well as for the maintenance of fish and game in some of the best remaining wildlife habitat in the State.
The goal of my talk today is to summarize some of the results of a recent USGS study1 on the geologic framework of the Verde River headwaters in the hope that a better understanding of the hydrologic system will help to clarify the science and lead to more informed decision making by stakeholders and the voting public regarding water resources. View Document.

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Options for Water Conservation Strategies

Report published in 2004 by the Yavapai County Water Advisory Committee lists and discussed various water conservation options. View Document.

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Report on options for water management strategies

Report by the WAC on options for water management. View Document.

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Yavapai County Long-term Development Scenarios

This report documents the data sources, assumptions and methodology used to develop a future-water-use scenario for application in the U.S. Geological Survey's (USGS) Northern Arizona Regional Groundwater Flow Model (NARGFM). The work was performed for the Yavapai County Water Advisory Committee (WAC) by H3J Consulting in consultation with the Technical Administrative Committee (TAC) of the WAC. View Document.