文献类型：期刊文献

中文题名：基于MODIS-NDVI与EVI数据的若尔盖区域植被生育期分析

英文题名：Analysis of Vegetation Growth Period in Zoigê Based on MODIS-NDVI and EVI

作者：李丹利[1] 苟思[1] 赵娜娜[2,3] 李龙国[1] 李欣怡[1] 张泽宇[1] 刘挺[1]

第一作者：李丹利

机构：[1]四川大学水力学与山区河流开发保护国家重点实验室/水利水电学院;[2]中国林业科学研究院湿地研究所;[3]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室

年份：2018

卷号：0

期号：S1

起止页码：162-166

中文期刊名：灌溉排水学报

外文期刊名：Journal of Irrigation and Drainage

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金项目(51509170;51609243);国家重点基础研究发展计划"973"项目(2015CB452701);中央级公益性科研院所基本科研业务费专项资金(CAFINT2015K06);中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放研究基金项目(IWHR-SKL-201612p)

语种：中文

中文关键词：若尔盖;遥感;NDVI;EVI;植被生育期

外文关键词：Zoigê;remote sensing;NDVI;EVI;vegetation growth period

分类号：Q948

摘要：【目的】比较若尔盖地区遥感NDVI和EVI数据在植被生育期分析中的差异。【方法】基于2001─2015年MODIS-NDVI和EVI数据,通过TIMESAT软件提取出若尔盖区域植被三个关键生育期信息:生育期起始时间、生育期长度和生育期NDVI、EVI峰值。【结果】NDVI和EVI数据空间分布特征相似,在植被生长旺盛的8月EVI数据比NDVI数据更灵敏。2001─2015年,NDVI和EVI提取的植被生育期结果显示,若尔盖地区植被生育期起始时间、生育期长度和生育期植被指数峰值年际变化趋势相似。NDVI提取的生育期起始时间比EVI的结果更早、生育期长度更长。若尔盖地区植被生育期空间分布上受到海拔的影响,高海拔地区植被生育期起始时间较晚,生长期更短。【结论】NDVI和EVI数据反映的植被生长动态大体相似,在生长旺季EVI较NDVI更敏感。
【Objective】Analysis of the differences between NDVI and EVI Data in Zoigêarea about vegetation growth properties.【Method】The three key vegetation growth properties in Zoigêregion were extracted using TIMESAT based on the MODIS-NDVI and EVI data from 2001 to 2015:the start of vegetation growth period,the length of vegetation growth period and the maximum NDVI and EVI value.【Result】The spatial distribution characteristics of NDVI and EVI data were similar.EVI data were more sensitive than NDVI data in August.From2001 to 2015,the NDVI and EVI derived results of the start of vegetation growth period、the length of vegetation growth period and the maximum vegetation index had similar trends.The vegetation growth period extracted from NDVI started earlier and had longer growth period comparing to the results from EVI.The spatial distribution of vegetation dynamics was significantly affected by elevation.【Conclusion】The results reflected by the NDVI and EVI data are similar in most areas.EVI data are more sensitive than NDVI data in vegetation growing season.