ForWarn II

Satellite-Based Change Recognition and Tracking


Assessing defoliation in the Boise National Forest

Thu, 09/13/2018 - 11:13 -- stevenorman
Defoliation on the Boise

ForWarn’s ability to accurately map defoliation comes from the high temporal frequency of the source imagery (MODIS). With any change detection, multiple disturbances are often at work in the same landscape at the same time, so careful assessment requires consideration of other stressors or disturbances.

In the Boise National Forest, defoliation from the spruce budworm and large wildfire have been recurring every year. Recently, a periodic eruption of the Douglas fir tussock moth has begun, and drought is episodic.

Logging near Willamette National Forest, OR

Tue, 07/07/2015 - 07:46 -- wchristie

ForWarn discovered an anomaly near Willamette National Forest, Oregon, in July 2015. Clear-cutting has historically occurred, starting around December, although there are reservations about logging in the wet season. Recent active logging in the area as well as a possibility of an escaped logging slash fire is the likely cause of greenness departure.


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