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As the climate changes, storms may become more frequent and intense, causing changes to the hydrograph (the way water runs off the land). Groundwater levels may change, too, affecting the groundwater table and some rivers and streams. Even riparian habitat—the vegetation growing along rivers and streams—may change as a result of changes in the climate. The Waterways Restoration Institute will develop a critical design tool that will guide stream restoration projects around the Bay Area. Regional "restoration curves" indicate the appropriate width and depth of a restored stream channel that will achieve equilibrium stability and avoid excessive erosion, deposition, and flooding. The curves will be developed through field research, analysis of rainfall and flow data, and watershed size, using representative streams in Marin and Contra Costa Counties. The San Francisco Bay Regional Water Quality Control Board will publish the curves as part of its water quality permit and stream protection programs.
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This project is funded by the U.S. Environmental Protection Agency's San Francisco Bay Water Quality Improvement Fund.
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