Hyperspectral characteristics and health status evaluation of vegetation in the restoration area of the abandoned ion type rare earth mine in Ganzhou, Jiangxi Province

Since the end of 2016, it has become the basic problem for the government to extract the rare earth ions in abandoned mine areas.In order to solve the above problems, China Geological Survey supported the mine geological environment survey of seven counties in Ganzhou, and deployed the comprehensive investigation and evaluation of the geological environment of the rare earth mines in Ganzhou.In this paper, UAV carrying hyperspectral spectrometer was used as the main remote sensing survey tool, the typical abandoned rare earth mine restoration area was selected as the research area, and the hyperspectral images of 2 km² of typical mining area in zudong area of Longnan county were obtained.With ENVI software, mixed linear model was used to extract spectral characteristics of original and restored vegetation in the mining area.Vegetation growth in abandoned rare earth mine area was analyzed by zoning, and the health status of vegetation in the restoration area was tentatively evaluated.This method combines geochemical survey with hyperspectral remote sensing, and provides a rapid and accurate evaluation means for the evaluation of vegetation ecological restoration effect of abandoned rare earth mines.