Matrix for Capturing Exposure from Wildland Fuels (image) National Institute of Standards and Technology (NIST) Share Print E-Mail Caption One side of the matrix represents the four types of fuel sources considered: homogeneous surface fuels (such as prairie grasses), inhomogeneous surface fuels (such as palmetto), inhomogeneous shrubs and low vegetation (such as chaparral) and canopied forest (such as forests of pine, cedar, juniper or aspen). The other two sides of the matrix represent three types of topography (ravine, slope and flat) and three local weather conditions (no wind, low wind and high wind). Credit Alex Maranghides, NIST Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.