MONITORING GEOHAZARDS IN ALASKA NATIONAL PARKS USING STRUCTURE FROM MOTION FROM AIRCRAFT
In 2017, we used the aerial system to measure glacier volume changes, ice-dammed lake level changes, changes in river morphology, and intertidal elevations. In 2018 we acquired aerial SfM over seven of the Alaska National Park units. We flew SfM for a variety of projects, which included monitoring and responding to geohazards. In 2018, we responded to a glacier outburst flood from an ice dammed lake in Kenai Fjords National Park. The flood breached a spit along the coast, which is a popular camping spot. We were able to calculate the volume of water from measuring the level of strand lines and flooding the DEM. We conducted change analysis of elevations along the Denali Park road to monitor landslide motions over a season. We were also able to get imagery and generate DEMs over the erupting Veniaminof Volcano. These projects have proven that SfM is an accessible, scalable technology that is useful for educating the public about the resources of Alaska National Parks and addressing timely management needs like geohazards.