近20年鄂西地区植被覆盖度时空变化特征分析  

Spatio-temporal Change Characteristics Analysis of Vegetation Coverage in Western Hubei Province in Recent 20 Years

作　　者：钟静 皇永波 郭明强 ZHONG Jing;HUANG Yongbo;GUO Mingqiang(Hubei Geomatics Technology Group stock Co.,Ltd.,Wuhan 430074,China;Key Laboratory of Urban Land Resources Monitoring and Simulation,Ministry of Natural Resources,Shenzhen 518034,China;School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China;National Engineering Research Center of Geographic Information System,Wuhan 430074,China)

机构地区：[1]湖北地信科技集团股份有限公司,湖北武汉430074 [2]自然资源部城市国土资源监测与仿真重点实验室,广东深圳518034 [3]中国地质大学(武汉)地理与信息工程学院,湖北武汉430074 [4]国家地理信息系统工程技术研究中心,湖北武汉430074

出　　处：《地理空间信息》2023年第2期50-55,共6页Geospatial Information

基　　金：国家自然科学基金资助项目(41971356,41701446);湖北省自然科学基金资助项目(2017CFB277);自然资源部城市国土资源监测与仿真重点实验室开放基金资助课题(KF-2020-05-011)。

摘　　要：基于2000—2020年的MOD13Q1 NDVI遥感数据,使用像元二分模型计算湖北省西部山体区域的植被覆盖度,并利用斜率模型、马尔可夫转移矩阵模型和赫斯特指数综合分析了植被覆盖度的时空变化规律。结果表明,研究区的植被覆盖度总体呈上升趋势,平均植被覆盖度增加了0.025,轻微增长区域面积为44 359.26 km^(2),显著性增长面积为3 069.375 km^(2),不显著性变化的面积为39 862 km^(2)。2000—2020年期间,时序植被覆盖度的赫斯特指数为0.63,表明研究区内植被覆盖度的增长趋势在未来是可持续的。本研究成果不仅可为城市生态环境评价提供科学依据,而且可为城市的生态建设和可持续发展提供决策支持。Based on the MOD13Q1 NDVI remote sensing data from 2000 to 2020, we calculated the fractional vegetation cover(FVC) in the mountain areas of western Hubei Province by the pixel dichotomy model, and used slope model, Markov transfer matrix model and Hurst index to analyze the spatio-temporal changes of FVC comprehensively. The results show that FVC in the study area generally shows an increase trend.The average FVC increases by 0.025, the area with slight FVC increase is 44 359.26 km~2, the area with significant FVC increase is 3 069.375km^(2), and the area with non-significant FVC change is 39 862 km~2. From 2000 to 2020, the Hurst index of time series FVC was 0.63, indicating that the increase trend of FVC will be sustainable in the future. This study can not only provide scientific basis for urban ecological environment assessment, but also provide decision-m4aking support for urban ecological construction and sustainable development.

关 键 词：植被覆盖度 像元二分模型 赫斯特指数 马尔可夫转移矩阵模型 

分 类 号：P237[天文地球—摄影测量与遥感]