摘要
将研究区划为8个自然条件相对均一的土地单元,然后根据ETM遥感影像解译及实地考察的结果,确定受人为干扰草地和未受人为干扰草地的范围。利用2001-2005年生长季MODIS ∑NDVI数据,分析研究区草地植被覆盖状况,并计算相对干扰指数。结果表明：生长季未受人为干扰草地的植被覆盖明显高于受人为干扰草地的植被覆盖,第6、第7单元的相对干扰指数较大说明这两个单元草地植被覆盖变化生长季受人为因素影响较严重。
At first, the study area was divided into eight land units. According to the remote sensing images interpreted and field investigated result, the grassland range of non-interfered and interfered by human factors was determined. Using the total NDVI of growing season from 2001 to 2005 the grassland vegetation cover and the relative degradation impact index were analyzed. The results showed that the vegetation cover of grassland that non-interfered by human factors was obviously higher than vegetation cover of grassland that interfered by human factors and the relative degradation impact index of 6th and 7th land unit was high. The grassland vegetation cover change of these two land units was impacted by human factors obviously.
出处
《中国草地学报》
CSCD
2007年第3期1-5,共5页
Chinese Journal of Grassland
基金
中国科学院知识创新工程重要方向项目(KZCX3-SW-356)
国家自然科学基金项目(40401003)
