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http://dx.doi.org/10.7780/kjrs.2019.35.6.2.9

Forest Damage Detection Using Daily Normal Vegetation Index Based on Time Series LANDSAT Images  

Kim, Eun-sook (Forest Ecology and Climate Change Division, National Institute of Forest Science)
Lee, Bora (Forest Ecology and Climate Change Division, National Institute of Forest Science)
Lim, Jong-hwan (Forest Ecology and Climate Change Division, National Institute of Forest Science)
Publication Information
Korean Journal of Remote Sensing / v.35, no.6_2, 2019 , pp. 1133-1148 More about this Journal
Abstract
Tree growth and vitality in forest shows seasonal changes. So, in order to detect forest damage accurately, we have to use satellite images before and after damages taken at the same season. However, temporal resolution of high or medium resolution images is very low,so it is not easy to acquire satellite images of the same seasons. Therefore, in this study, we estimated spectral information of the same DOY using time-series Landsat images and used the estimates as reference values to assess forest damages. The study site is Hwasun, Jeollanam-do, where forest damage occurred due to hail and drought in 2017. Time-series vegetation index (NDVI, EVI, NDMI) maps were produced using all Landsat 8 images taken in the past 3 years. Daily normal vegetation index maps were produced through cloud removal and data interpolation processes. We analyzed the difference of daily normal vegetation index value before damage event and vegetation index value after event at the same DOY, and applied the criteria of forest damage. Finally, forest damage map based on daily normal vegetation index was produced. Forest damage map based on Landsat images could detect better subtle changes of vegetation vitality than the existing map based on UAV images. In the extreme damage areas, forest damage map based on NDMI using the SWIR band showed similar results to the existing forest damage map. The daily normal vegetation index map can used to detect forest damage more rapidly and accurately.
Keywords
Time-series satellite images; forest damage; normal vegetation index; change detection; Landsat 8;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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