Nearshore Strategies Data Report
Cereghino et al 2012 completed a soundwide analysis to identify and describe river delta sites in Puget Sounds as part of a nearshore ecosystem restoration strategy (using remote sensing data c. 2000-2006). The following narrative of this delta site was developed to support distribution and use of analysis results:
- The Nooksack Delta in the San Juan Sub-basin historically contained 4,720 acres of vegetated wetland along a 41 km shoreline. The delta receives flow from a 203,524 square kilometer watershed. These characteristics make this system the 4th largest delta out of 16 systems in Puget Sound.
- Simenstad et al 2011 found that this system had lost 71% of its vegetated tidal wetlands, and 47% of its shoreline length. Of the remaining shoreline, 42% shows some evidence of infrastructure development. In the surrounding uplands, 19% of land is estimated to have greater than 10% impervious surface. Across the watershed, 25% of land is estimated to have greater than 10% impervious surface. Based on these paramters, the site was given a degradation score of 36 out of 100, making it the 10th most degraded delta in Puget Sound. It faces a medium risk of future development locally, and a high risk of development across the watershed. None of the watershed is currently impounded behind dams.
- Delta restoration is not a priority in the current Puget Sound Salmon Recovery Plan
- The Lummi Nation is:
- developing a tidal wetland mitigation bank on the Lummi River side of the delta
- Completed work on enhancing wetlands as part of the Sumgglers Slough Restoration
- Whatcom County Public Works has been:
- studying levee setback options between Ferndale and the Delta
- acquiring repeatedly flooded properties in the Village of Marrieta