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USGS hydrologist Mike Dettinger, seen during a 2004 trip to Yosemite, makes regular trips to the Sierra Nevada to track the streamflow that provides Southern California with much of its water. |
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USGS hydrologist Mike Dettinger, seen during a 2004 trip to Yosemite, makes regular trips to the Sierra Nevada to track the streamflow that provides Southern California with much of its water. |