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| 遥感和GIS支持下的中国退耕还林还草决策分析 | |
| 引用本文： | 杨存建,刘纪远,张增祥,赵晓丽.遥感和GIS支持下的中国退耕还林还草决策分析[J].遥感学报,2002,6(3):205-211. |
| 作者姓名： | 杨存建 刘纪远 张增祥 赵晓丽 |
| 作者单位： | 1. 中国科学院遥感应用研究所,北京,100101;四川师范大学遥感与GIS应用研究中心,四川,成都,610066;云南大学生态研究所,云南,昆明,650091 2. 中国科学院地理科学与资源研究所,北京,100101 3. 中国科学院遥感应用研究所,北京,100101 |
| 基金项目： | 国土环境遥感时空信息分析与数字地球相关理论技术预研究 (KZCX1 Y 0 2 )，国家资源环境遥感时空数据库建设与时空特征研究 (CX0 0 0 0 0 9)的联合支持 |
| 摘 要： | 1998年的特大洪水灾害，以及2000年京津地区的沙尘暴，使得中国政府对生态环境的建设更加重视。为了改善中国的生态环境，就需要恢复植被，一些耕地就需要退耕还林还草。哪些耕地需要退耕还林还草，这些耕地在空间上的分布情况如何？为此，探讨了利用地理信息系统技术确定需要退耕还林还草耕地的数量及其空间分布。包括4个步骤。首先，建立土地利用、土壤侵蚀、数字高程、坡度、坡向、植被指数、降雨和温度等数据库，并对生态环境质量进行评价，从而得到生态环境质量数据库；其次，从土地利用数据库中提取旱地的数据，并与坡度数据、土壤侵蚀数据、植被指数数据和生态环境质量数据进行叠加分析；再次，确定退耕还林还草的原则，并在GIS的支持下，确定需要退耕还林还草的面积及其空间分布；最后，利用降雨数据进一步分别确定退耕还林或还草的面积及其空间分布。该研究结果可以为中国的生态环境建设提供科学的决策依据。 |
| 关 键 词： | 遥感 GIS 中国 退耕还林 地理信息系统 旱地 林地 草地 |
| 文章编号： | 1007-4619(2002)03-0205-07 |
| 收稿时间： | 2000/12/1 0:00:00 |
| 修稿时间： | 2000年12月1日 |
Decision-marking on Returning the Dry Upland to Forest or Grass Land with Support of GIS and Remote Sensing in China |
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| YANG Cun-jian,LIU Ji-yuan,Zhang Zeng-xiang and ZHAO Xiao-li.Decision-marking on Returning the Dry Upland to Forest or Grass Land with Support of GIS and Remote Sensing in China[J].Journal of Remote Sensing,2002,6(3):205-211. | |
| Authors: | YANG Cun-jian LIU Ji-yuan Zhang Zeng-xiang and ZHAO Xiao-li |
| Institution: | Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China;Research Center of Remote Sensing and GIS Applications Sichuan Normal University,Chengdu 610066;Institute of Ecology and Geobotany,Yunnan University,Kunming 650091,C;Institute of Geographics Sciences and Natural Resource,CAS,Resources,Beijing 100101;Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China;Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China |
| Abstract: | Natural disaster such as the large flood took palce in 1998 in China and the dust storm in 2000 around Beijing makes our government paying more attention to improve the ecological environment in China. In order to improve the ecological environment, a great deal of the dry land must be returned back to forest or grass land. Where the dry land must be changed inlo the forestland or grassland is a very important question.In our study GIS is used to find the place where the dry land must be changed into forestland or grassland. In includes four steps. Firstly, the database is extablished including land use database, soil erosion database,DEM, slope database, aspect database, normalization vegetation index (NDVI) database, precipitation database and temperature database. The ecological environment quality database is oltained thtough evaluating the ecological environment quality. Secondly, the dry land from Landuse database was overlain with slope database, soil erosion database, normalization vegetation index(NDVI) database and the ecological environment quality database. The distribution of the dry land of different slope was analyzed. The distribution of the dry land of different slope under different soil erosion, different NDVI and different ecological environment quality was also analyzed. Thirdly, the expert knowledge about the dry land was collected, and a model of finding suitable places for changing into forestland or grassland is formulated on the basis of the knowledge. Finally, the suitable places are overlain with the precipitation layer to decide where trees need to be planted or where grass need to be planted. It shows that the results provide an important scientific decision base for government to construct the ecological environment in China. |
| Keywords: | geographic information system dry land Forest land grass land |
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