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Temporal and spatial evolution and genesis of rocky desertification based on RS and GIS in Wenshan Prefecture |
| GUO Liqin1, 2, 3, ZHAO Zhifang1, 2, 3, DAI Qixue1, 2, 3, LIANG Mingyue1, 2, 3, FU Yixun1, 2, 3, CHEN Bailian1, 2, 3 |
1. College of Resources Environment and Earth Sciences, Yunnan University, Kunming 650500, China;
2. Yunnan Remote Sensing Center, Kunming 650500, China;
3. “The Belt and Road”Strategic Research InstituteDepartment of Large Data, Kunming 650500, China; |
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Abstract Wenshan Prefecture is one of the most developed areas of rocky desertification in eastern Yunnan. The process of rocky desertification has always been widely concerned by experts both in China and abroad. In this paper, using Wenshan Prefecture as the research object, selecting the remote sensing data of TM in 2008 and GF-1, ZY-3,YG-2 in 2014 as data source, employing RS and GIS technology, rocky desertification status data are extracted. The temporal and spatial evolution characteristics of rocky desertification and cause analysis in Wenshan State were explored. The results show that the rocky desertification area of Wenshan Prefecture was reduced by 1 796.41 km2 from 2008 to 2014, the type of rocky desertification dominated by Wenshan Prefecture was changed from heavy to moderate, and rock desertification area decreased except for Xichou, Malipo and Qiubei, and that the highest rate of rocky desertification in Wenshan Prefecture was within 0.5 km from the tectonic fault zone, in carbonate rock and clastic rock areas, on steep slopes (15 °,25 °], in areas with large population density and within 50 m from mining activities. In the rocky desertification prone areas, we should give priority to doing rocky desertification control measures, dealing with the relationship between man and land, and preventing human factors from inducing and aggravating rocky desertification development.
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| Keywords
remote sensing
image
cloud detection
sensor
review
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Issue Date: 24 November 2017
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2017,
Vol. 29
