In this OLU, for example, baylands that were once part of Alameda Creek’s alluvial fan are now used for salt production or managed wetlands. They provide a rare buffer between the Bay and developed communities, where an ecotone levee could be built to bolster climate resilience and provide high tide or high water refugia for local wildlife. At the southeastern end of this OLU there are unique opportunities to protect and prepare open space for marsh migration inland as the Bay rises. In the upper watershed, more green infrastructure could help prevent flooding in developed areas around the creek.

In this OLU, for example, space is limited by the setting in a small valley surrounded by headlands, and by all the urban development around the San Rafael Canal. Most of the historic marshes have been filled but there are a few opportunities for enhancement and ecotone levees (such as Tiscornia). Nearshore reefs or submerged aquatic plants and vegetation could provide habitat and slow waves and resulting erosion of the shore. Another nature-based opportunity would be to replace some rip rap with coarse beaches.