摘要
研究归一化植被指数(NDVI)时空演化特征可为区域生态环境保护和自然资源管理提供理论参考和技术支撑.基于2000—2019年四川省NDVI遥感数据,通过趋势分析法探讨研究区NDVI时空演变规律,结果表明,从时间尺度看,四川省NDVI总体呈增长趋势,NDVI绝对值高低与植物生长的物候时序相吻合,表现为夏季>秋季>春季>冬季;从空间尺度看,NDVI增加区域占研究区总面积的91.41%,其中,秋、冬两季是NDVI显著增长季节,其增长区域主要集中于青藏高原东缘地带.由于城镇化进程加快,龙门山和龙泉山所夹持的成都平原地带NDVI值总体呈下降趋势.
The study of temporal and spatial evolution characteristics of normalized vegetation index(NDVI)aims at providing theoretical reference and technical support for regional ecological environment protection and natural resources management.Based on the NDVI remote sensing data of Sichuan province from 2000 to 2019,the temporal and spatial evolution of NDVI in the study area was discussed through trend analysis.The results indi⁃cated that NDVI in Sichuan province showed increasing trend from the perspective of time scale,the absolute value of NDVI was consistent with the phenological sequence of plant growth,with the absolute value of NDVI the largest in summer and the lowest in winter.From the perspective of spatial scale,NDVI increased area accounted for 91.41%of the total area of the study area,NDVI increased significantly in autumn and winter,NDVI growth area is mainly distributed in the eastern margin of the Qinghai-Tibet Plateau.Due to the accelerated urbanization pro⁃cess,the NDVI value of the Chengdu plain enclosed by Longmen Mountain and Longquan Mountain shows general trend of decline.
作者
陈浩
董廷旭
马丽
林孝先
李勇
CHEN Hao;DONG Tingxu;MA Li;LIN Xiaoxian;LI Yong(School of Resource and Environmental Engineering,Mianyang Teachers’College,Mianyang,Sichuan 621000;National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059)
出处
《绵阳师范学院学报》
2024年第2期106-112,共7页
Journal of Mianyang Teachers＇ College
基金
四川省科技厅科技计划项目(2019YJ0496)
绵阳师范学院质量工程项目(Mnu-JY20239)
绵阳师范学院科研启动项目(QD2021A35).
关键词
NDVI时空演化
趋势分析
地貌单元
四川省
temporal and spatial evolution
Trendanalysis
Geomorphicunit
Sichuan province
