Promote and maintain mechanisms for sediment transport and deposition. The goals of this sediment management strategy are twofold. First, if coastal wetlands are to survive in the face of accelerated sea level rise, vertical accretion must be sufficient to pace with increasing sea level. Restoring direct tidal and riverine input to areas that have been isolated from tidal hydrology or are otherwise sediment-starved can reestablish the conditions that promote mineral sediment deposition and organic matter accumulation, thereby enhancing vertical accretion. Second, shoreline sediment transport, also called shoreline drift, has been disrupted in some areas by bluff armoring and the excavation of the entrance channel to the Sandy Point Marina. Bulkheads are installed in efforts to protect upland development from erosion, but effectively starve downdrift beaches of needed feeder bluff sediment and induce alternative patterns in erosion that adversely affect seaward and downdrift habitats. Where identified as appropriate, removing bulkheads entirely or replacing them with soft bank protection may successfully restore and maintain natural sediment transport processes.
Tribe: Lummi Indian Nation
View Source Document: Lummi Nation Climate Change Mitigation and Adaptation Plan: 2016-2026
Year: 2016
Topic:
Maintain and enhance coastal wetland habitats.
(view all topics in the plan)
Region: Northwest
