Research on remote sensing monitoring of zirconium-titanium sand mine exploitation and strategies of ecological restoration on the eastern beach of Hainan Island
Yuling ZHAO1, Jinzhong YANG1, Yaqiu YIN1, Hang ZHAO2, Jinbao HE2, Han ZHANG2
1. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China 2. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
With the popularity of the idea that clear waters and green mountains are as valuable as mountains of gold and silver, rehabilitation of mine environment has become an important part of national ecological civilization. The eastern coast of Hainan Island is one of the most potential areas for uhligite exploitation. However, long-term mining activities have destructed the original ecological environment of that area, leading to the fact that the local ecological environment has become poorer and needs to be rebuilt urgently. By using high resolution remote sensing data, exploitation and recovery conditions of beach placers from 2016 to 2017 in the eastern coast of Hainan island were monitored. The results indicate that, from 2016 to 2017, damaged areas of zirconium-titanium sand mine grew by 40.65 hm 2 and the number of exploitation surfaces increased by 15. The exploitation presents a tendency that the scale was reduced and distributed. Besides, during 2016 to 2017, recovery areas of mine ecological environment grew to some extent and the mine environment conditions showed a tendency of improvement. Through annual comparison and analysis, the authors proposed treatment advice for mining wasteland of zirconium-titanium sand mine as follows: Casuarina equisetifolia could be used as the main species, combined with vatican hainanensis, acacia confuse, and slash pine as accessory species, to restore the forest ecosystem of the mining area; in addition, watermelons, sweet potatoes, peanuts and some other crops could be also applied to conducting restoration experiments in some representative regions; furthermore, damaged mining areas may also be rebuilt into seawater farms.
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Yuling ZHAO, Jinzhong YANG, Yaqiu YIN, Hang ZHAO, Jinbao HE, Han ZHANG. Research on remote sensing monitoring of zirconium-titanium sand mine exploitation and strategies of ecological restoration on the eastern beach of Hainan Island. Remote Sensing for Land & Resources, 2019, 31(4): 143-150.
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2019, Vol. 31 
