Nooksack Delta

From Salish Sea Wiki
Jump to navigation Jump to search

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.