watervulnerability

Helena National Forest Watershed Vulnerability Assessment, Northern Region (R1)
Composite Watershed Vulnerability
Watershed vulnerability was determined by overlaying the sensitivity analysis with the exposure analysis.
Watersheds with include high value infrastructure and high sensitivity that also had highest risk of
snowpack loss where rated as most vulnerable. The most vulnerable watersheds (Figures 9 and 10) are
found in the northernmost section of the forest where changes in winter snowpack possibly resulting in
rain on snow events pose the highest risk to forest infrastructure.
Figure 9. Watershed vulnerability with regards to forest infrastructure is based on
watershed sensitivity and exposure results for the 2030-2059 time periods
60 Assessing the Vulnerability of Watersheds to Climate Change