摘要
选取云南省禄劝县为研究区域,利用2001-2015年MODIS中国植被指数合成产品Tiff遥感图像,利用Arc GIS对云南省植被指数进行分区统计,得到研究区域各年每月的NDVI值。在此基础上进行统计分析,描述研究区域植被指数的年际、季节及月变化特点,并结合当地的种植制度进行分析。结果表明:禄劝县2001-2015年的年平均NDVI值有增加趋势,趋势线斜率为0.003,在2013年达到最高值,2014年次之。夏季和秋季的植被覆盖度高于其他两个季节;秋冬两季的NDVI值呈增加趋势,且冬季的增速大于秋季。禄劝县一年当中NDVI最高值出现在8月,最小值出现在4月,这与禄劝县植被生长期和枯萎期相对应。
Luquan County in Yunnan Province was selected as the research area. The MODIS China vegetation index synthetic product remote sensing image of Tiff in 2001-2015 was used. The NDVI value of Yunnan Province was made the statistic by Arc GIS. Then the NDVI values of each year and each month in Luquan County were obtained. On the basis of the statistical analysis,the annual,seasonal and monthly variation characteristics of vegetation index in Luquan County were described and analyzed combining the local cropping systems. The results showed that the annual mean NDVI of 2001-2015 in Luquan County had an increasing trend with the trend line slope of 0. 003,which reached the highest value in 2013,and the second was in2014. The vegetation coverage in summer and autumn was higher than that in the other two seasons. The NDVI value of autumn and winter was in an increasing trend respectively,and the growth rate in autumn was greater than that in winter. The highest NDVI value in Luquan County in a year occurred in August,and the minimum value appeared in April,which was related to the vegetation growth period and withering period in Luquan County.
出处
《山东农业科学》
2017年第2期117-119,131,共4页
Shandong Agricultural Sciences
基金
国土资源部公益性行业科研专项"促进乌蒙山区脱贫的国土开发利用决策支持系统"(201511003-4)
