地理学报

地理学报 ›› 2001, Vol. 56 ›› Issue (2): 181-188.doi: 10.11821/xb200102006

• 论文 • 上一篇    下一篇

遥感和GIS支持下的云南省退耕还林还草决策分析

杨存建1,2, 刘纪远3, 张增祥1, 党承林2   

  1. 1. 中科院遥感应用研究所,北京100101;
    2. 云南大学生态所,昆明650091;
    3. 中科院地理科学与资源研究所,北京100101
  • 收稿日期:2000-10-20 修回日期:2001-01-20 出版日期:2001-03-15 发布日期:2001-03-15
  • 基金资助:
    中国博士后基金;中国科学院知识创新项目(KZCX1-Y-02-01)

Decision on Reforesting and Regrassing Some of the Dry Sloping Cultivated with Support of GIS and Remote Sensing in Yunnan

YANG Cun jian1,2, LIU Ji yuan3, ZHANG Zeng xiang1, DANG Cheng lin2   

  1. 1. Institute of Remote Sensing Applications, CAS, Beijing 100101, China;
    2. Institute of Ecology and Geobotany, Yunnan University, Kunming 650091, China;
    3. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2000-10-20 Revised:2001-01-20 Online:2001-03-15 Published:2001-03-15
  • Supported by:
    Project of Chinese A cademy of Sciences No.KZCX1-Y-02-01

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280 | 37

摘要： 以云南省为例,探讨利用地理信息系统技术来确定需要退耕还林还草的耕地数量及其空间分布。其中包括 4个步骤。首先,建立土地利用、土壤侵蚀、坡度、植被指数、水体、降雨和温度等数据库。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、植被指数数据进行叠加分析。对水体建立缓冲区,并与耕地数据进行叠加分析。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空间分布及其面积。最后,利用降雨和温度数据进一步确定分别退耕还林和还草的空间分布及其面积。研究结果可以为云南省的生态环境建设提供科学的依据。

关键词: 地理信息系统, 旱地, 林地, 草地, 云南省

Abstract: The strategy to develop China’s western region has been proposed by the central Governmant and ecological environmental construction constitute a very important part of the strategy. In order to improve the ecological environment of China’s western region, a great deal of the dry upland must be reforested and regrassed. Where the dry upland must be changed into the forestland or grassland is quite essential GIS is identified as a useful tool to find the place where the dry upland must be changed into forestland or grassland in Yunnan province, Southwest China. Four steps are included. Firstly, relevant databases are established including land use database, elevation database, slope database, soil erosion database, water body database, precipitation database and temperature database. Secondly, the dry land from landuse database was overlain with slope database, soil erosion database, normalization vegetation index(NDVI) database. The distribution of the dry land of different slopes was analyzed. The distribution of the dry land of different slopes under different soil erosion conditions with different NDVIs is also analyzed. Thirdly, the expert knowledge about the upland cultivated was collected, and the model for finding the suitable place for being returned back to forestland or grassland is formulated on the basis of the knowledge. Finally, the suitable place is overlain with the precipitation layer and temperature layer to decide where trees need be planted and where grass need be planted. It shows that the results are very useful for the ecological environment construction in Yunnan Province.

Key words: Geographic Information System, dry upland, forest land, grassland

中图分类号: 

  • X171.4