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Human activities have significantly altered forest conditions throughout Eastern Washington, United States, particularly in the wildland-urban interface where small acreage private landowners control a significant share of remaining forests. Focusing on Spokane County as a case study, this project used Geographic Information Systems, remotely sensed data, and property ownership information to estimate forest cover, identify private forest landowners in the wildland-urban interface, and measure vegetation changes between 1991 and 2011. Simplified reclassification of land cover yielded an estimated 315,268 acres (127,584 hectares) of forest in the county, approximately 28% of total land area. Forty-seven percent of forested land (149,236 acres - 60,393 hectares) is owned by 21,045 small forest landowners (defined here as individuals owning 2-180 acres). Change detection analysis using multi-temporal Landsat imagery measured slight increases in mean Normalized Difference Vegetation Index (+1.2 points) and mean Normalized Burn Ratio (+5.2 points). Visual comparison with aerial imagery suggested significant increases (>20 points) corresponded with forest growth or regeneration, while significant decreases (>20 points) corresponded with development or forest removal.
This summary report synthesizes the findings contained in the Southern Wildland-Urban Interface Assessment (General Technical Report SRS-55). The Assessment provides a review of critical wildland-urban interface issues, challenges, and needs for the Southern United States. Topics include population and demographic trends, economic and tax issues, land use planning and policy issues, urban influences on forest ecosystems, challenges for forest resource management and conservation, social issues, and themes and research needs for the wildland-urban interface.
Forests at the wildland-urban interface are at increasing risk due to the impacts of urbanization. Conserving and managing these forestlands for continued ecological and social benefits is a critical and complex challenge facing natural resource managers, land-use planners, and policymakers. Forests at the Wildland-Urban Interface: Conservat