原创《基于NDVI昆明市2001—2018年植被覆盖变化趋势分析》：这篇趋势分析论文范文为免费优秀学术论文范文,可用于相关写作参考。
摘 要：基于地理空间数据云平台中的MODIS中国区域归一化植被指数（NDVI）产品MODND 1M合成产品遥感图像,本研究利用ArcGIS软件对获得的植被指数遥感图像进行植被覆盖数据截取和统计,得到昆明市2001—2015年每月的NDVI值,并利用一元线性趋势法对其年际、季节和月均变化情况进行了分析.结果显示,昆明市的年均NDVI值在2001—2015年间呈现上升态势,线性倾斜率为0.0036,表明在这15年间昆明市的植被覆盖率在缓慢地稳定增长.月均NDVI值1—4月逐渐降低,4月最低,线性倾斜率为0.54；之后开始逐渐上升,8月达到峰值,线性倾斜率为0.7169,之后呈波动下降趋势.总体来说,7—12月昆明市植被的NDVI值较高,线性倾斜率均超过0.64,这和昆明市7—10月为雨季有直接关系,说明植被指数的月变化趋势主要受降雨的影響.2001—2015年昆明市春季、秋季和冬季的NDVI值呈增长趋势,夏季处于负增长状况,说明昆明市15年间春、秋、冬三季植被覆盖度不断增加.
关键词：NDVI；植被覆盖；变化趋势；昆明市
中图分类号：S127文献标识号：A文章编号：1001-4942（2018）01-0107-04
Abstract Based on the synthetic remote sensing images of the MODND 1M as the MODIS product of China regional normalized difference vegetation index （NDVI） from the Cloud Platform of Geographical Spatial Data, in this study,we intercepted and counted the vegetation cover data from the gained remote sensing images using ArcGIS software, obtained the monthly NDVI values during 2001-2015 in Kunming, and then analyzed its annual, seasonal and monthly change by the method of monadic linear trend. The results showed that the annual average NDVI value in Kunming showed a trend of increasing from 2001 to 2015, and the linear inclination rate was 0.0036, which indicated that the vegetation cover rate in Kunming had increased steadily and slowly during the past 15 years. The monthly average NDVI value decreased from January to April with the linear inclination rate as 0.54, and the lowest one was in April；then it gradually increased and reached the peak in August, and the linear inclination rate was 0.7169；after that,it showed a fluctuation trend of decreasing. In general, the NDVI value was higher from July to December in Kunming, and the linear inclination rate was more than 0.64, which showed a direct relationship with the rainy season from July to October in Kunming. It indicated that the monthly change trend of vegetation index was mainly affected by rainfall. The NDVI value of Kunming spring, autumn and winter in 2001-2015 showed trends of increasing, while that of summer showed negative growth, which showed that the vegetation coverage increased in spring, autumn and winter of Kunming during the past 15 years.
Keywords NDVI； Vegetation cover； Change trend； Kunming City
植被作为陆地生态系统的主体,既是气候变化的承受者,也会对气候变化产生反馈作用,对全球变化研究起重要的指示作用[1-3].归一化植被指数（normalized difference vegetation index,NDVI）是植被分布密度和生长状态的指示因子,和植被覆盖度呈正相关[4,5],是当前研究植被时序性变化的重点[6].同时,NDVI也被广泛用作指示植被活动力度大小[7]和净初生产力（net primary productivity）的指标[8],是目前研究和应用中最为广泛、普遍的一种植被指数[9-12].NDVI的时间序列变化能够较好地反映当地植被覆盖情况的变化,通过分析某一区域NDVI的年际、季节、月均变化等可以间接了解该区域的植被覆盖变化.已有很多学者进行过相关研究,如：李辉霞等[13] 基于NDVI的分析发现,三江源地区2001—2010年的植被覆盖呈现上升态势,且该增长趋势和水热相关；马明国等[14] 利用 HRR数据分析了1981—2001年中国西北地区NDVI的年内和年际变化特征,发现21年间西北地区的植被覆盖出现退化,虽然局部地区有所改善,但其改善力度始终远小于其退化幅度；贺映娜等[15]研究表明1998—2009年米仓山的NDVI年均和生长季变化都呈增长趋势,并且植被覆盖增加面积远大于退化面积.
趋势分析论文参考资料：
结论：基于NDVI昆明市2001—2018年植被覆盖变化趋势分析为关于趋势分析方面的的相关大学硕士和相关本科毕业论文以及相关趋势分析法的基本步骤论文开题报告范文和职称论文写作参考文献资料下载。
