人类活动影响下安徽省植被指数时空变化分析
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国家自然科学基金项目(71971002)、安徽省重大专项(202003a06020016)和安徽省重点研发计划项目(202004a07020050)


Spatio-temporal Variation of NDVI in Anhui Province under Influence of Human Activities
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    摘要:

    利用2006—2020年MODIS NDVI数据和2010年及2015年的国内生产总值(GDP)、人口(POP)、土地覆盖(Land Cover)空间分布数据,分析了安徽省NDVI的时空变化规律及人类活动对NDVI空间变异的影响。结果表明:2006—2020年安徽省NDVI在0.535~0.568之间波动,总体呈改善趋势,累积增长率为6.23%;季节上年增长率由大到小依次为秋季(0.0042a-1)、冬季(0.0036a-1)、夏季(0.0031a-1)和春季(0.0029a-1)。15年来,安徽省NDVI明显改善和轻微改善的区域面积占全省NDVI面积的69.17%,改善区域主要分布在长江以南地区;季节上,春季和冬季对NDVI改善的贡献最大。安徽省NDVI呈现持续性改善的区域占42.36%,呈现持续性退化的区域占17.23%,退化区域主要分布在省会城市及其周边经济发展较快城市。2010年GDP、POP、Land Cover对NDVI的空间变异分布解释力均在27%以上,2015年解释力均在15%以上,可见,GDP、POP、Land Cover对NDVI的空间分布均存在显著的影响。安徽省2006—2020年NDVI在时间和空间上均呈不断改善趋势,表明安徽省的绿色发展正在稳步推进。

    Abstract:

    Based on the data of MODIS and NDVI from 2006 to 2020 and the spatial distribution data of gross domestic product (GDP), population (POP) and Land Cover in 2010 and 2015, the temporal and spatial changes of NDVI in Anhui Province and the influence of human activities on the spatial variability of NDVI were analyzed. The results showed that from 2006 to 2020, the NDVI of Anhui Province fluctuated between 0.535 and 0.568, showing an overall improvement trend. Its cumulative growth rate was 6.23%. The seasonal growth rate from high to low was: autumn (0.0042a-1), winter (0.0036a-1),summer (0.0031a-1) and spring (0.0029a-1). In the past 15 years, 69.17% of the NDVI area in Anhui Province was significantly improved or slightly improved. The improvement areas were mainly distributed in the south of the Yangtze River. Spring and winter made the greatest contribution to the improvement of NDVI. The areas where NDVI showed continuous improvement accounted for 42.36%, and the areas showing continuous degradation accounted for 17.23%. The areas of degraded NDVI were mainly distributed in capital cities and the places with rapid economic development. In terms of the impact of human activities, the explanatory power of GDP, POP and Land Cover on the spatial variability distribution of NDVI in 2010 were all over 27%, and the explanatory power in 2015 was all over 15%. It can be seen that GDP, POP and Land Cover all had a significant impact on the spatial distribution of NDVI. From 2006 to 2020, the NDVI of Anhui Province showed a continuous improvement trend in temporal and spatial changes. It showed that the green development of Anhui Province was advancing steadily.

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魏圆圆,孙守刚,梁栋,贾兆红.人类活动影响下安徽省植被指数时空变化分析[J].农业机械学报,2022,53(8):203-212. WEI Yuanyuan, SUN Shougang, LIANG Dong, JIA Zhaohong. Spatio-temporal Variation of NDVI in Anhui Province under Influence of Human Activities[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(8):203-212.

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  • 收稿日期:2021-09-07
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  • 在线发布日期: 2021-11-05
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