How will flood protection be provided for communities adjacent to the restoration project?
A. The proposed restoration alternatives contain provisions to manage flood hazards from both fluvial (stream) and coastal flood sources. One feature consistent across restoration alternatives is an inboard levee system to reduce the hazards of coastal flooding. This proposed line of flood protection may include existing levees (where adequate), high ground, and new flood protection levees. From a fluvial flood-management perspective, there are two approaches to reducing flood hazards: providing increased channel-flow conveyance or providing increased flood storage (detention). The project uses a conveyance approach where possible, though both approaches may be utilized. Conveyance can be increased by removing, breaching, or setting back the existing channel levees, widening the channel and providing additional cross-sectional area for flow. Conveyance can also be increased using regular tidal scour to enlarge the channel cross-section. Breaching slough levees will route more tidal flo
