【摘要】 近年来流域生态环境严重退化,成为我国区域生态环境演变研究的重点地区之一,而植被是生态环境中最重要、最敏感的自然要素,植被覆盖变化对区域生态环境质量有着重要影响。因此本文基于地理信息系统和遥感技术,采用一元线性回归分析方法,利用NASA全球数据中心16天合成全球250m的MODIS数据,分析了近11a来巴音河流域的植被分布及变化情况,并简单分析了植被生长的气候影响因素。结果表明,近11a来,巴音河流域7月份大部分地区植被的植被指数为0.1~0.4;植被指数变化率为-0.04~0.04;植被生长与气温和降雨的相关系数分别为0.06和0.03;巴音河流域植被处于非常低的分布状态,而自然植被的破坏是造成水土流失的主要原因,因此该区域植被生态环境非常脆弱,亟待改善。更多还原

【Abstract】 In recent years,the ecological environment deterioration has become one of the regional ecological environments of China development research focus area,vegetation is the most important and sensitive natural factor on ecological environment,vegetation cover change has an important impact on the regional ecological environment quality.This paper,extracted vegetation index(NDVI)in vegetation season(July)of Ba Yin River Basin from 2002 to 2012based on geographic information systems and remote sensing application technology,and by using the method of monadic linear regression analysis with MODIS data from the U.S.National Aeronautics and Space Administration(NASA)which spatial resolution of global data center is 250 mand the time resolution is 16 days,adopted a linear regression trend analysis method to calculate the change rate of the vegetation index in this basin in the past 11 years,analyzed the changes in vegetation distribution of Bayin River Basin in the past 11 years,and simply analyzed the climate influence factors on vegetation growth.The results show that in the past 11 years,most of the vegetation index in Bayin River Basin was between 0.1and 0.4,the change rate of the vegetation index was between-0.04 and 0.04 in July,the correlation coefficients of vegetation growth and temperature and rainfall are 0.06 and 0.03,respectively.This shows the entire range of inland vegetation change in direction towards benign and deterioration in Bayin River basin is roughly equal,but has presented a very low distribution,and the destruction of natural vegetation was the main reason for causing soil erosion,so that the regional vegetation ecological environment was very fragile,and will need to be improved.更多还原