jailcd2021011: Analysis of Vegetation Coverage after Fukushima Nuclear Accident based on NDVI

Abstract

In March 2011, due to the tsunami disaster caused by the earthquake, a major nuclear leakage accident occurred at the Fukushima Daiichi Nuclear Power Plant. Nearly 10 years have passed since the accident. Because the leakage of nuclear radiation is extremely destructive to the ecosystem, within 12.5 miles of the Fukushima nuclear power plant was transformed into an isolation zone. In order to analyze the changes in vegetation coverage near the nuclear power plant within a few years after the accident and after the sharp reduction in human interference, this study collected landsat8 remote sensing data in the same season in the study area in the years after the accident. After preprocessing the data using ENVI, the vegetation spectrum information of the study area is extracted. Based on the calculated normalized difference vegetation index (NDVI), assign different NDVI values to the corresponding meaning of vegetation coverage, and use ArcGIS to make vegetation coverage grade maps. This study quantitatively analyzed the changes in vegetation coverage in the study area in the years following the nuclear spill. The nuclear accident resulted in a significant reduction in human interference in the isolation zone, increased the connectivity and concentration of vegetation, and vegetation coverage has become more connected.