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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (14): 198-203.doi: 10.11924/j.issn.1000-6850.2013-2307

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于MODIS数据非洲典型国家荒漠化现状监测研究

周兰萍 陈芳 魏怀东 丁峰 李发明 胡小柯   

  • 收稿日期:2013-08-29 修回日期:2013-09-17 出版日期:2014-05-15 发布日期:2014-05-15
  • 基金资助:
    国家国际科技合作项目“中国-联合国合作非洲水行动——非洲荒漠化国家防治沙漠化技术合作与沙产业开发”(2010DFA32850)：“非洲干旱地区干旱预警机制及适应性技术合作”(2010G00002)。

Study on Monitor to Status of Desertification in Typical African National Using MODIS Image Data

  • Received:2013-08-29 Revised:2013-09-17 Online:2014-05-15 Published:2014-05-15

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摘要： 为了了解和掌握非洲国家的荒漠化现状、程度及分布，采用MODIS MOD13Q1-NDVI数据，通过NDVI累计计算，得到埃及、阿尔及利亚、尼日利亚2010年植被生长状况较好时期的NDVI影像。基于像元二分模型，估算植被盖度，利用植被盖度进行荒漠化现状评价。结果表明：埃及和阿尔及利亚的荒漠化问题十分严重，荒漠化面积占国土面积的94%以上，且重度荒漠化占荒漠化面积的比例最大。尼日利亚受荒漠化影响较小，荒漠化占国土面积的比例14.77%，且轻度荒漠化占荒漠化面积的比例将达到99%。不同国家不同程度的荒漠化，分布在不同行政区划的不同的省份。本研究将为非洲荒漠化防治、保护生态环境和国民经济的可持续发展提供科学依据。

关键词: 改良效果, 改良效果

Abstract: In order to understand and master the present situation of desertification of African countries, the degree and distribution. Egypt, Algeria and Nigeria were selected as 3study areas and MODIS MOD13Q1-NDVI data with high temporal resolution were used in this study. Based on the accumulation of NDVI values in 2010, the images of NDVI were obtained in Egypt, Algeria and Nigeria. The vegetation coverage of Egypt, Algeria and Nigeria was calculated by the dimidiate pixel model, which was used to assess desertification in the study area. Results showed that: there was a serious problem of desertification in Egypt and Algeria, desertification area accounts for more than 94% of land area, and serious desertification accounted for the largest proportion of desertification area. There was less affected by desertification in Nigeria, desertification proportion of the total land area of 14.77%, and slight desertification accounted for the proportion desertification area would reach 99%. Different countries with different degree of desertification, had distribution in different administrative districts of different provinces. The results could be the scientific basis for desertification control, protecting the ecological environment and the sustainable development of national economy in Africa.