Hydrogeology of the Muir Beach Community Services District well site : Frank Valley, Redwood Creek, California : Golden Gate National Recreation Area
Martin L. 2000. Hydrogeology of the Muir Beach Community Services District well site : Frank Valley, Redwood Creek, California : Golden Gate National Recreation Area. Technical Report NPS/NRWRD/NRTR-2000/265 (NPS D-397). National Park Service. Fort Collins, Colorado
A study was conducted to determine whether pumping groundwater at Muir Beach Community Services District Supply Well would cause depletion of streamflow in Redwood Creek. It was determined that the alluvial aquifer in Frank Valley is a heterogeneous aquifier that is hydrologically interconnected with surface flow in Redwood Creek. Pumping water from the Muir Beach Community Services District Supply Well induces infiltration from Redwood Creek to the alluvial aquifer. Streamflow depletion was estimated to be 70-80% of the pumping rate of the well. Impacts of groundwater pumping on streamflow can be minimized by restricting pumping to nighttime hours when streamflow is not being further depleted by evapotranspiration. Water conservation measures by the Muir Beach community will reduce water demand, lessening the impact of groundwater pumping. Relocating the supply well to a location further downstream would transfer the impact of streamflow depletion about 3000 feet downstream.
- Type
- Published Report
- Authors
- Martin, Larry
- Date of Issue
- 2000-04
- Publisher
- National Park Service
- Units
- GOGA , WRD
- Keywords
- Clemson, Frank Valley, Ground Water, Groundwater pumping, Hydrogeology, Impacts, infiltration, Management, Monitoring, Muir Beach Community Services District, Redwood Creek, streamflow depletion, Surface Water, Water Conservation, Water Resources, Water Supply, Well yield, WRBIB