Great Basin Ecological Forecasting II

NDVI processed imagery from Suomi-NPP VIIRS in late June 2019 composited with elevation and aspect from the NED. The Henry Mountains in southern Utah are displayed. The lighter yellows and pinks indicate higher elevations and greater vegetation concentration where darker colors, including green and blue, indicate lower elevations and areas concentrated with less vegetation. Areas with higher vegetation indices indicate higher live fuel moisture content which aids decision-makers in allocating resources before and during wildfires.

Keywords: NDVI, aspect, elevation, live fuel moisture, Gavin Pirrie, Helena Bierly, Avery King, Katherine Mistick

Assessing and Forecasting Live Fuel Moisture Content of Wildfire Fuels for the Eastern Great Basin to Improve Wildfire Timing and Severity Predictions

The eastern Great Basin (EGB) extends throughout the states of Arizona, Colorado, Idaho, Utah, and Wyoming, covering approximately 411,000 km2. In recent years, wildfires in the EGB have increased in frequency and size, representing a growing concern for our partners at the Bureau of Land Management (BLM), the National Weather Service (NWS), and the Great Basin Coordination Center (GBCC). Live fuel moisture (LFM) is an important factor in predicting wildfire risk, as dry vegetation requires less energy to combust than wet vegetation. Land managers currently derive LFM levels from just 165 in situ sites in the EGB. In order to provide partners with a more accurate assessment of LFM, the team used data from the National Elevation Dataset, Aqua and Terra Moderate Resolution Imaging Spectroradiometer, and Suomi National Polar-orbiting Partnership Visible Infrared Imaging Radiometer Suite. These datasets include vegetation indices, evapotranspiration, and topographic variables, which were used to create biweekly forecasts of LFM throughout the EGB. An accuracy assessment was conducted using historical in situ data from our partners at the BLM and the GBCC. This model allowed our partners to make informed decisions regarding resource allocation in response to the predicted timing and severity of wildfires in the EGB.

Location
Idaho - Pocatello
Term
Spring 2020
Partner(s)
Bureau of Land Management, Upper Snake Field Office
NOAA, National Weather Service
Great Basin Coordination Center
NASA Earth Observations
Suomi-NPP VIIRS
Terra MODIS
Aqua MODIS
Team
Gavin Pirrie (Project Lead)
Helena Bierly
Avery King
Katherine Mistick
Advisor(s)
Keith Weber (Idaho State University, GIS Training and Research Center)