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| 遥感与GIS支持下的松嫩平原农牧交错区土地沙漠化调查研究 | |
| 引用本文： | 刘志明,晏明,李铁强,刘海风,何艳芬.遥感与GIS支持下的松嫩平原农牧交错区土地沙漠化调查研究[J].第四纪研究,2004,24(3):348-354. |
| 作者姓名： | 刘志明 晏明 李铁强 刘海风 何艳芬 |
| 作者单位： | 1. 吉林省农业区划研究所,长春,130062 2. 吉林省气象科学研究所,长春,130062 3. 中国科学院东北地理与农业生态研究所,长春,130012 |
| 基金项目： | 吉林省环境科学技术项目 (批准号 :2 0 0 10 0 9)，吉林省重点科学技术项目 (批准号 :1999-919-11)共同资助 |
| 摘 要： | 以1986年和2000年两个时期的LANDSATTM数据作为主要信息源,对松嫩平原农牧交错区的土地沙漠化现状、程度和发展趋势进行遥感解译和实地调查。分析研究结果表明:区域内的土地沙漠化总体上呈逆转趋势。主要表征为沙漠化土地面积减少,平均每年减少0.71×104hm2,年递减率为0.8%;沙漠化程度渐轻,微度沙漠化土地增加92.9%,而轻、中、重度沙漠化土地减少了44.3%。该地区的土地沙漠化整体上以逆转趋势为主,还有一些局部区域沙漠化程度仍在发展,土地沙漠化的状况不容忽视。人类活动对区域土地沙漠化的影响比较明显,气候变化和地理环境也对土地沙漠化产生重要的影响,沙漠化土地类型由以草地为主转为以旱地为主。 |
| 关 键 词： | 松嫩平原 沙漠化 遥感与GIS 动态趋势 |
| 文章编号： | 1001-7410(2004)03-348-07 |
| 收稿时间： | 2003-08-27 |
| 修稿时间： | 2004-01-18 |
THE SURVEY STUDY ON THE LAND DESERTIFICATION IN THE ECOTONE OF SONGNEN PLAIN BASED ON RS AND GIS |
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| Institution: | 1. Institute of Agricultural Divisions of Jilin Province, Changchun 130062; 2. Jilin Institute of Meteorological Sciences, Changchun 130062; 3. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012 |
| Abstract: | By taking LANDSAT TM images in 1986 and 2000 as the main information source, with the field survey, the status quo, degree and developing trend of the land desertification were interpreted and analyzed in the ecotone of Songnen Plain. The land desertification in the area had the trend of reversing, which can be embodied by the decreasing area, and the land desertification degree. From 1986 to 2000, the desertified land area decreased by 0.71×10 4hm 2/a in average, and the annual decrease rate is 0.8%. On the other hand, the trend of the degree of land desertification converted to less desertified. During the time period, the total area of light-degree desertified land, middle-degree desertified land and severe-degree desertified land decreased by 44.3%. But the area of slight-degree land desertification increased by 92.9% , indicating the great decrease of middle- to severe-degree desertified lands. We can say that the main trend of the land desertification in the area has been controlled. The problem of land desertification cannot be neglected because the degree of land desertification was still intensified in the specific part of the area. The human activities were the main driving force of the land desertification in the area. Land use and climatic variation are of significant influence too. The desertfied land was decline to the dry landing stead of mainly from the grassland before. |
| Keywords: | Songnen Plain desertification RS and GIS dynamic trend |
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