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Agency reviews seawater-intrusion fixes: extraction barrier and aquifer storage discussed
Summary
Agency staff summarized presentations on aquifer storage and recovery and an extraction-barrier concept to push back seawater intrusion; modeling suggests technical feasibility but capital, treatment and long-term operations costs could be substantial and funding/allocation remain unresolved.
The Arroyo Seco Groundwater Sustainability Agency heard staff summarize two seawater-intrusion approaches Tuesday: an aquifer storage and recovery (ASR) project and a conceptual extraction barrier of pumped wells that modeling shows could shift the seawater intrusion front seaward.
The agency’s general manager summarized an ASR presentation by the Monterey Peninsula Water Management District, saying the district currently uses four wells with treatment to drinking-water standards and stores and recovers roughly “about 1,000 acre-feet a year.” He said that approach—injected, treated surface water stored…
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