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Gallatin National Forest Watershed Vulnerability Assessment, Northern Region (R1) PARTNERS Data were provided by: • The Montana Natural Resource Information System (NRIS) • Montana Bureau of Mines and Geology (MBMG) • US Geology Survey (USGS) • University of Washington Climate Impacts Group (CIG) • Montana Fisheries Information System (MFISH) • US Forest Service (USFS) R1 Geospatial Group • Ecoshare Assistance with the analysis was provided by: • Kerry Overton et al., Rocky Mountain Research Station • Ralph Martinez, Plumas National Forest • Jim Morrison, R1 Regional Office ASSESSMENT OBJECTIVES The objective of this project was to develop a reliable method to prioritize all HUC-6 watersheds within the GNF in order to focus forest resource conservation and restoration efforts. A watershed characterization process was first developed to assess the relative sensitivity of the watersheds to disturbance, based on various environmental parameters. A vulnerability assessment further prioritized watersheds using the Watershed Condition Framework, resources of value, and exposure (climate projections). The proposed analysis has been developed in part to address the USFS initiative in considering climate change in land management decisions. Current studies show climate change is occurring, but climate model projections are uncertain and models at common management scales are nonexistent. Therefore, alternative methods of examining the potential impacts of climate change and other environmental stressors are needed. While this initial framework was originally designed from a watershed perspective, the results can also have implications for terrestrial management, such as fire, rangeland and wildlife management activities on the GNF. This process is intended to make it easy to update previous runs or examine other resources simply by rotating in the appropriate datasets. This project will also provide an example for other Forests in Region 1 to develop similar vulnerability assessments. SCALE OF ANALYSIS The scale of the analysis used in the GNF assessment was HUC-6 (12-digit) subwatersheds (Figure 2) and HUC-5 (10-digit) watersheds (Figure 3). 32 Assessing the Vulnerability of Watersheds to Climate Change
Gallatin National Forest Watershed Vulnerability Assessment, Northern Region (R1) Figure 2. Subwatersheds (HUC-6) on the Gallatin National Forest Figure 3. Watersheds (HUC-5) on the Gallatin National Forest 33 Assessing the Vulnerability of Watersheds to Climate Change
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Assessment of Watershed Vulnerabili
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White River National Forest Watersh
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Coconino National Forest Watershed
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Sawtooth National Forest Watershed
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Shasta Trinity National Forest Wate
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Umatilla National Forest Watershed
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Ouachita National Forest Watershed
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Chugach National Forest Watershed V
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