| 吉林省西部土地沙化动态变化 |
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| 引用本文： | 刘惠清,许嘉巍,吕新苗.吉林省西部土地沙化动态变化[J].地理学报(英文版),2003,13(3):379-384. |
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| 作者姓名： | 刘惠清 许嘉巍 吕新苗 |
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| 作者单位： | [1]Inst.ofUrbanandEnvironmentalScience,NortheastNormalUniversity,Changchun130024,China [2]Inst.ofGeographicSciencesandNaturalResourcesResearch,CAS,Beijing100101,China |
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| 基金项目： | Department of Science & Technology of Jilin Province，No.1999010 |
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| 摘 要： | The sandy land of the western part of Jilin Province is located in the ecotone of semi-humid and semi-arid area in the temperate zone of China. The sandy desertification has widely spread in the region because of the vulnerable natural conditions and the unreasonable human activity; as a result of this, the precious land resources and the economic development in the area have been seriously impacted. In this paper, the sandy land ecologic environment geographic information system is established based on the multi-spectral, multi-temporal Landsat TM images and field investigation. The comprehensive indexes of sandy desertification extent assessment which include vegetation degradation, wind erosion extent and soil depth are presented to classify the sandy land in western Jilin into three levels--slight, moderate and severe sandy desertification with the support of GIS platform. The results demonstrate that the sandy desertification has been partly controlled in the past twenty years, except some small sites. However, this doesn‘t necessarily mean that there is nothing for more concern. The two main causes of sandy desertification have not been eliminated yet, one is its natural factor, especially the physical and chemical characters of sandy soil and dry climate; another is the immoderate economic activity of human being that has highly accelerated the sandy desertification process.
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| 关 键 词： | 吉林 土地荒漠化 沙地 动力学分析 GIS 地理信息系统 遥感技术 空间分布 |
| 收稿时间： | 11 March 2003 |
| 修稿时间： | 6/8/2003 12:00:00 AM |
Spatial distribution of sandy desertification change in the west of Jilin Province |
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| Huiqing,Liu,Jiawei,Xu,Xinmiao,L. V..Spatial distribution of sandy desertification change in the west of Jilin Province[J].Journal of Geographical Sciences,2003,13(3):379-384. |
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| Authors: | Huiqing Liu Jiawei Xu Xinmiao L V |
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| Institution: | 1. Inst. of Urban and Environmental Science, Northeast Normal University, Changchun 130024, China
2. Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
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| Abstract: | The sandy land of the western part of Jilin Province is located in the ecotone of semi-humid and semi-arid area in the temperate zone of China. The sandy desertification has widely spread in the region because of the vulnerable natural conditions and the unreasonable human activity; as a result of this, the precious land resources and the economic development in the area have been seriously impacted. In this paper, the sandy land ecologic environment geographic information system is established based on the multi-spectral, multi-temporal Landsat TM images and field investigation. The comprehensive indexes of sandy desertification extent assessment which include vegetation degradation, wind erosion extent and soil depth are presented to classify the sandy land in western Jilin into three levels--slight, moderate and severe sandy desertification with the support of GIS platform. The results demonstrate that the sandy desertification has been partly controlled in the past twenty years, except some small sites. However, this doesn't necessarily mean that there is nothing for more concern. The two main causes of sandy desertification have not been eliminated yet, one is its natural factor, especially the physical and chemical characters of sandy soil and dry climate; another is the immoderate economic activity of human being that has highly accelerated the sandy desertification process. |
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| Keywords: | western Jilin sandy desertification dynamic analysis causes remote sensing GIS |
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