西南山区不同岩性背景下植被覆盖特征分析——以盘县为例  

Analysis of vegetation cover under the background of different lithology characteristics in the mountainous area in Southwest of China——A case study of Panxian

作　　者：杨春艳[1,2] 杨广斌[1,2] 陈智虎[1,2] 

机构地区：[1]贵州师范大学地理与环境科学学院,贵州贵阳550001 [2]贵州省山地资源与环境遥感应用重点实验室,贵州贵阳550001

出　　处：《贵州师范大学学报（自然科学版）》2016年第6期1-7,共7页Journal of Guizhou Normal University：Natural Sciences

基　　金：国家自然科学基金项目(41361091);贵州省优秀青年科技人才培养对象专项资金项目(黔科合人字[2013]39号)

摘　　要：以Landsat数据为数据源,利用地理信息系统技术,提取盘县1990、2001、2015年的归一化山地植被指数(NDMVI),采用像元二分模型对植被覆盖度进行估算,分析盘县植被覆盖时空分异特征以及岩性对其的影响。研究表明:盘县以高植被覆盖为主,生态环境较好;岩性对植被的覆盖程度及其变化存在一定的影响,纯碳酸盐岩、夹层碳酸盐岩、互层碳酸盐岩分布区植被覆盖情况比非碳酸盐岩分布区差,纯碳酸盐岩、间层碳酸盐岩对植被覆盖变化较敏感,纯碳酸盐岩和间层碳酸盐岩分布区生态环境较脆弱,易受到外界干扰,非碳酸盐岩分布区生态环境较稳定,不易受到外界的干扰。Based on the Landsat data,we extract normalized mountain vegetation index（ NDMVI）of the PanXian at the year of 1990,2001 and 2015 by using geographic information system technology,and use the pixels-binary model to estimate vegetation coverage,to analyze the spatial-temporal changing characteristics of vegetation coverage,and the influence from lithology. The results show that the study area is given priority to with high vegetation coverage during 25 years,and the ecological environment is good. Lithology has certainly influence on the distribution and variation of vegetation. In the areas of pure,sandwich and inter-bed carbonate rock,the vegetation coverage is worse than the poor carbonate rock distribution area. The pure and the inter-bed carbonate rock is more sensitive to the change of vegetation coverage. That shows the ecological environment is fragile in the pure and the inter-bed car-bonate rock area. The ecological environment is more stable in the poor carbonate rock area.

关 键 词：岩性 植被覆盖 响应指数 盘县 

分 类 号：F301[经济管理—产业经济]