Regional Issues in Aquifer Storage and Recovery for Everglades Restoration A Review of the ASR Regional Study Project Management Plan of the Comprehensive Everglades Restoration Plan (2002) / Chapter Skim
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1 Introduction
1 Introduction
Pages 5-10
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From page 5... ...
Among its many features are removal of barriers to sheetflow, wastewater reuse, treatment wetlands, surface water storage reservoirs, and underground water storage (USAGE, 19991. OPTIONS FOR WATER STORAGE IN THE CERP The need for water storage for the CERP has led to the proposal to drill over 300 aquifer storage and recovery (ASR)
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~— f ~ * , .1- a ~ Stint ram FIGURE 1 Proposed ASR systems in the Comprehensive Everglades Restoration Plan.
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Additional advantages cited for this strategy are that ASR wells can be located in areas of greatest need, thus reducing water distribution costs, and that ASR permits recovery of large volumes of water during severe, multi-year droughts to augment deficient surface water supplies. Potential disadvantages of ASR wells include low recharge and recovery rates relative to surface storage, which limit capture rates of excess water, and losses due to mixing within brackish or saline aquifers (USAGE, 1999~.
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These included the following: a regional assessment, Development of a preliminary list of data needs and compilation of available data for · Development of a regional-scale groundwater flow model in parallel with initial data compilation to identify data gaps, · Drilling of exploratory wells in key areas, including core sampling, downhole geophysical logging, hydraulic testing and water quality sampling, · Seismic reflection surveys, used in conjunction with results from exploratory wells, to constrain the three-dimensional geometry and continuity of hydrostratigraphic units, · Use of the regional model in conjunction with other regional data sets to develop a multi-objective approach to ASR facility siting during final design of the regional ASR systems, · Scientific studies, including laboratory and field bioassays and ecotoxicological studies, to help determine appropriate standards that consider not only the initial receptors of the recovered water, but also downstream receptors, · Characterization of organic carbon of the source water and studies designed to anticipate the effects of this material on biogeochemical processes in the subsurface,
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and conduct predictive simulations to evaluate the technical feasibility of the proposed 333-well CERP ASR system, or if determined to be infeasible, identify an appropriate magnitude of ASR capacity with minimal impact to the environment and existing users of the FAS (CERP, 2002~. REPORT OBJECTIVE AND OVERVIEW A fourth draft of the ASR Regional Study PMP was prepared by the USACE and the SFWMD in May 2002, and the Task Force requested that the CROGEE conduct a technical review of that document.
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Chapter 3 addresses other technical issues that are not directly related to these tasks. Chapter 4 summarizes the conclusions and recommendations of this review.
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