基于MODIS NDVI时序数据的湖南省植被变化研究

doi:10.11870/cjlyzyyhj202105007

长江流域资源与环境 >> 2021, Vol. 30 >> Issue (5): 1100-1109.doi: 10.11870/cjlyzyyhj202105007

基于MODIS NDVI时序数据的湖南省植被变化研究

桑国庆^1,2，唐志光^1* ，邓刚^1,2，管庆丹³，陈浩¹，李朝奎¹，王晓茹^1,2

（1.湖南科技大学地理空间信息技术国家地方联合工程实验室，湖南湘潭 411201；2.湖南科技大学资源环境与安全工程学院，湖南湘潭 411201；3.昆明理工大学国土资源与工程学院，云南昆明 650093）

出版日期:2021-05-20 发布日期:2021-06-15

Study on Vegetation Change in Hunan Province Based on MODIS NDVI Time Series Data

SANG Guo-qing ^1,2, TANG Zhi-guang ¹, DENG Gang ^1,2, GUAN Qing-dan ³, CHEN Hao ¹, LI Chao-kui ¹, WANG Xiao-ru ^1,2

(1. National-Local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China; 2. School of Resource, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; 3. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China)

Online:2021-05-20 Published:2021-06-15

摘要/Abstract

摘要： 基于MODIS NDVI时间序列数据集，运用Mann-Kendall趋势分析检验、Hurst指数和相关分析等方法，对2000~2018年湖南省植被时空变化特征、演化趋势的可持续性及其与气温、降水和日照时数的关系进行了研究。结果表明：（1）湖南省植被覆盖整体较高（年均NDVI为0.54），高植被覆盖区主要分布在以林地覆盖为主的山地和丘陵地区；NDVI具有明显的季节变化特征，8月份最高（0.67），2月份最低（0.36）。（2）近19年湖南省NDVI整体呈上升态势，增速为8.6%/10 a（P<0.01）；其中显著增加的地区占76.09%，主要分布在湘中与湘西北的林地、耕地、草地区域；NDVI显著下降的区域仅占1.46%，主要分布在长株潭等建设用地区域以及洞庭湖平原的局部耕地区域。（3）未来湖南省植被变化的总体趋势可能向退化的恶性方向发展（占76.59%），其中改善与强反持续性趋势占23.25%。（4）日照时数、气温对研究区植被NDVI的影响主要表现为冬季的正相关。

Abstract: Using MODIS NDVI datasets from 2000 to 2018 as the main data sources, the spatiotemporal variation characteristics of NDVI in Hunan province and its change trend in the future were analyzed, as well as the relationship between NDVI and temperature, precipitation and sunshine duration. The results are as follows: (1) The NDVI of Hunan Province was relatively high with the annual average NDVI of 0.535, and high values of NDVI were mainly distributed in forest-dominated mountainous and hilly lands. The seasonal change of NDVI was significant, it peaked in August (0.674) and reached the lowest in Fabruary (0.363). (2) Generally, the NDVI of Hunan Province revealed a significant increase with the rate of 8.6%/10a during 2000-2018. The areas with significant increasing trend for NDVI accounted for 76.09% of the total study area, mainly distributed in the forest, cultivated land and grassland of central and northwestern Hunan province; And the area with significant decrease trend for NDVI accounted for only 1.46%, mainly distributed in the construction land of Chang-Zhu-Tan area and some field land in Dongting Lake Plain. (3) The NDVI in 76.59% of the study area was predicted to decrease in future, and particularly 23.25% of the area will follow a significant NDVI degradation trend. (4) There was a obvious positive correlation between NDVI, sunshine duration and temperature in winter of the study area.

桑国庆, 唐志光, 邓刚, 管庆丹, 陈浩, 李朝奎, 王晓茹. 基于MODIS NDVI时序数据的湖南省植被变化研究[J]. 长江流域资源与环境, 2021, 30(5): 1100-1109.

SANG Guo-qing, TANG Zhi-guang, DENG Gang, GUAN Qing-dan, CHEN Hao, LI Chao-kui, WANG Xiao-ru. Study on Vegetation Change in Hunan Province Based on MODIS NDVI Time Series Data[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2021, 30(5): 1100-1109.

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基于MODIS NDVI时序数据的湖南省植被变化研究

Study on Vegetation Change in Hunan Province Based on MODIS NDVI Time Series Data

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