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State Water Board launches groundwater–surface water study after high compliance with Clear Lake information orders
Summary
State Water Resources Control Board staff said they collected extensive groundwater and surface-water data from landowners in the Clear Lake watershed under a 2023 information order, will analyze results this year and run hydrologic models through 2026–27 to evaluate how pumping and diversions affect streamflows critical to the Clear Lake hitch.
Jessica Bean, a Division of Water Rights staffer at the State Water Resources Control Board, told a Lake County Farm Bureau meeting that the board will use information gathered under an emergency information-order regulation to build a groundwater–surface water model aimed at understanding how well pumping and surface diversions affect tributary flows that the Clear Lake hitch use to spawn.
Bean said the emergency regulation issued in late 2023 was active for one year and the board chose not to readopt it after receiving strong voluntary cooperation. “We got 90% compliance with the regulation,” she said, and information orders had been sent to more than 1,800 parcels in the watershed.
The study will address four questions Bean listed:…
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