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中国沙漠 ›› 2009, Vol. 29 ›› Issue (1): 56-62.

• 沙漠与沙漠化 • 上一篇    下一篇

RS与GIS支持下近50 a海南岛西部土地沙漠化时空演变过程研究

郑影华1, 李 森2, 王兮之2, 李会川3, 高尚玉1   

  1. 1.北京师范大学资源学院, 北京 100875; 2.佛山大学资源与环境科学研究所, 广东 佛山 528000; 3.佛山市国土资源局顺德分局, 广东 佛山 528300
  • 收稿日期:2007-08-07 修回日期:2008-07-23 出版日期:2009-01-20 发布日期:2009-01-20

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. 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
  • Received:2007-08-07 Revised:2008-07-23 Online:2009-01-20 Published:2009-01-20

摘要:

海南岛西部是我国惟一的热带稀树干草原沙漠化地区,选取5期遥感数据,采用室内解译和野外检验修正的方法,获得海南岛西部不同时期土地沙漠化数据库。结果分析表明,海南岛西部土地沙漠化在时间上经历了快速发展—初步逆转—全面逆转—波动反复的变化过程;在空间上由沿岸带向昌化、莺歌海两重心收缩、逆转;同时,其发展/逆转过程以沙漠化土地与林地、耕地相互转化为主,伴随着沙漠化土地内部复杂程度间转化。总之,总体逆转、局部反复波动是近50 a海南岛西部土地沙漠化时空演变的基本趋势。

关键词: 海南岛西部, 土地沙漠化, 时空演变, RS, GIS

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.

Key words: western Hainan Island, land desertification, spatio-temporal change, RS and GIS

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