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Maintaining Recharge to Springs and Seeps Downgradient from Residential Developments An Analysis From Bodega Bay, California.

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Presentation on theme: "Maintaining Recharge to Springs and Seeps Downgradient from Residential Developments An Analysis From Bodega Bay, California."— Presentation transcript:

1 Maintaining Recharge to Springs and Seeps Downgradient from Residential Developments An Analysis From Bodega Bay, California

2 Main Points Challenge: End calls late during environmental review Challenge: End calls late during environmental review Challenge: Design characterization and mitigation monitoring program sufficiently robust to allow for changes in the project or in the hydrogeology Challenge: Design characterization and mitigation monitoring program sufficiently robust to allow for changes in the project or in the hydrogeology Critically Important: Use of multiple lines of evidence Critically Important: Use of multiple lines of evidence Challenge: Evaluate to precisions of 1-3 gpm Challenge: Evaluate to precisions of 1-3 gpm Expect: Findings that both prior-seasons rainfall and wet-dry epicycles affect wetland Expect: Findings that both prior-seasons rainfall and wet-dry epicycles affect wetland Challenge: Prepare for monitoring which may stretch over years Challenge: Prepare for monitoring which may stretch over years

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8 Water Budget Results Dry Year:10.5 acre-feet (5 inches/acre) Dry Year:10.5 acre-feet (5 inches/acre) Normal Year:26.0 acre-feet (12.5 inches/acre) Normal Year:26.0 acre-feet (12.5 inches/acre) Wet Year:36.2 acre-feet (17 inches/acre) Wet Year:36.2 acre-feet (17 inches/acre)

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21 Conclusions Embed the ground-water professional early in all assessments of wetlands and riparian habitats. Embed the ground-water professional early in all assessments of wetlands and riparian habitats. Multiple lines of evidence are needed to validate Multiple lines of evidence are needed to validate Multiple lines of evidence are needed for resilience of mitigation monitoring Multiple lines of evidence are needed for resilience of mitigation monitoring Prepare for project durations of 10 to 15 years Prepare for project durations of 10 to 15 years


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