Evaluation for Damaged Degree of Vegetation by Forest Fire using Lidar and a Digital Aerial Photograph

Abstract

The amount of vegetation physically damaged by forest fire can be evaluated using lidar (Light Detection And Ranging) data because the loss of canopy height and width by forest fire can be relevant to the number of points transmitted to the ground through the canopy of the damaged forest. On the other hand, the biological damage of vegetation caused by forest fire can be obtained from the Normalized Difference Vegetation Index (NDVI), which determines the vegetation vitality. In this study, the degree of physical damage from the lidar data was classified into serious physical damage (SPD) and light physical damage (LPD). The degree of biological damage using NDVI was likewise classified into serious biological damage (SBD) and light biological damage (LBD). Finally, the damaged area was graded into four categories. (a) SPD and SBD. (b) LPD and SBD. (c) SPD and LBD and (d) LPD and LBD/The accuracy assessment for the area classified into four grades showed an overall accuracy of 0.74. and a kappa value of 0.61 which provides improvement over previous works.