| 沙漠与沙漠化 |
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| Spatio-temporal Changes of Sandy Desertification in Recent 50 Years in Western Hainan Island Based on RS and GIS |
ZHENG Ying-hua1, LI Sen2, WANG Xi-zhi2, LI Hui-chuan3, GAO Shang-yu1 |
| 1.College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China;
2.Institute of Resources and Environment Sciences, Foshan University, Foshan 528000, China;
3.Shunde Branch, Bureau of Land and Resources of Foshan City, Foshan 528300, China |
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Abstract Western Hainan Island is the only savanna region experiencing desertification in China. In this paper, aerial and satellite data and methods include RS interpretation and GIS analysis are used to obtain the evaluation data of land desertification in western Hainan Island in five phases between the late 1950s and the early 2000s. The results suggest that the area of desertification in western Hainan Island has experienced a fluctuating process of four phases in order, which are rapid development, preliminary reversal, comprehensive reversal, and rebounding on the floor; the law of spatial variation is that the progress of desertification takes place mainly in the delta of downstream of Changhua River and the lagoon plains in Yinggehai, and desertification area grows shrinkingly and reversely gradually from coastline; the progress of development and reversion in desertification principally consists of the transformation between woodland, cultivated and desertified land, coupled with complicated transformation among desertification lands. In conclusion, the spatial and temporal trend of desertification in Hainan Island is globally reverse but partially developing.
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Received: 07 August 2007
Published: 20 January 2009
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2009, Vol. 29 
