摘要
坝区是亟待系统研究的云南高原特殊的自然地理单元,植被覆盖度的动态变化是其重要研究内容之一.以云南思茅坝区为研究对象,收集Landsat系列遥感数据,结合气象站点的标准气象数据,辅以ENVI 5.1和ArcGIS 10.2进行NDVI提取、空间统计分析及相关分析等一系列操作,探讨思茅坝区1990-2017年间的植被覆盖变化特征和气象等影响因子的关系.结果表明:(1)近30a间思茅坝区的植被覆盖度增加速率为1.01%/a,减少速率为1.53%/a,总体植被覆盖度呈下降趋势,对应面积分别占比为27.36%和41.33%;植被覆盖度下降面积基本维持在29%~34%之间,没有发生变化的稳定在29%~34%,2010-2017年时段增长最快,2000-2010年时段大幅度骤减,其他时段未发生大范围变化.(2)思茅坝区植被覆盖度与气象因子中的平均水气压相关性较好,近年人类活动对其植被覆盖度变化也向正面效应转变.
Basin in Yunnan Plateau is a special natural system with special topography,which is urgently needed to be studied systematically.The change of vegetation coverage in basins is also an important research part.The Landsat series of remote sensing data were collected and the standard climate data of meteorological stations were combined with ENVI 5.1 and ArcGIS 10.2 for NDVI extraction,spatial statistical analysis and correlation analysis.Besides,to discuss the relationship between vegetation coverage change and climate and its influencing factors in SIMAO basin from 1990 to 2017.The results show that the total vegetation coverage in SIMAO basin decreased in the past 27 years.The increase rate was 1.01/a,and the reduction rate was 1.53/a.The corresponding area was27.36% and 41.33%,respectively.The vegetation coverage decrease maintained at 29%-34%,and there was no dramatically change in the stability of 29%-34%.2010-2017 ais a period of the fastest growing,2000-2010 ais sharply plummeted,and other periods do not occur in a wide range of changes.Correlation between vegetation coverage and the average water pressure of climatic factors is good.In recent years,human activities have the positive effect to change of the SIMAO vegetation coverage.
作者
苏文豪
甘淑
袁希平
孙毓蔓
SU Wenhao;GAN Shu;YUAN Xiping;SUN Yuman(Faculty of Land Resource Engineering,Kunrning University of Science and Technology,Kunming 650093,China;The Surveying and Mapping Center of Technology Application Engineering of Plateau Mountain Space Information of Colleges and Universities in Yunnan,Kunrning 650093,China)
出处
《河南大学学报（自然科学版）》
CAS
2018年第5期574-580,共7页
Journal of Henan University:Natural Science
基金
国家自然科学基金项目(41561083)
云南省自然科学基金项目(2015FA016)
关键词
植被覆盖
遥感监测
动态变化
气象因子
思茅坝区
vegetation cover change
remote sensing
dynamic change
meteorological factor
SIMAO basin
