摘要
现迫切需要确定那些对森林覆盖率变化有显著影响的森林经营制度。这个研定提出了初步的"概念依据"方法论,它把毁林理论与卫星图像变化分析结合起来鉴定理论上也许不存在的林区。通过对尼泊尔Chitwan地区陆地卫星TM图像时间分析,结合道路地理信息系统以及对地形的目视估计。鉴定出10个这样的森林异相。再通过快速野外调查,确定哪一个异相出现有用的创新性森林经营。根据这个信息,选择了一个实地作详细的野外调查。通过这一项分析,我们发现这是一个重要的社区林和生态旅游的项目,此前我们并不知其存在。文章对这种方法在监测森林覆盖变化的应用的价值和局限进行了描述。
There is a critical need to locate innovative forest management institutions that significantly impact forest cover change. This research presents an initial “proof of concept” methodology which combines deforestation theory with satellite image change analysis to identify forested areas that, theoretically, should probably not be there. Ten such “forest anomalies” are identified using temporal analysis of Landsat TM imagery of the Chitwan district in Nepal, linked with a GIS database on roads and a visual estimation of topography. A rapid field reconnaissance is undertaken to determine which of these anomalies exhibit interesting forest management innovations. Based on this information, one case is selected for detailed field study: this turns out to be a major case of community forestry and a premier ecotourism initiative that we were not aware of until we undertook this analysis. The utility and limitations of the method are described for monitoring trends in forest cover change.
