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首页> 外文期刊>E3S Web of Conferences >Spatial-Temporal variations of vegetation and the relationship with precipitation in summer-A case study in the hilly area of central Sichuan province
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Spatial-Temporal variations of vegetation and the relationship with precipitation in summer-A case study in the hilly area of central Sichuan province

机译：夏季植被时空变化及其与降水的关系-以川中丘陵区为例

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The hilly area of central Sichuan is one of the ecologically fragile regions in the upper reaches of the Yangtze River, and it is also the main part of ecological engineering construction. The ecological environment in the study area is related to the ecological security in the middle and lower reaches of the Yangtze River. Recent years have witnessed a great change in vegetation cover in this area as a result of climate change. Therefore, it is necessary to identify the changing patterns of vegetation cover and the impacts of climate change on the vegetation cover change in the study area. In this paper, the characteristics of vegetation cover change over the past 15 years were analyzed, based on the dataset of MODIS NDVI from 2001 to 2015 as well as the climate data from 55 meteorological stations, with methods such as maximum value composite (MVC), linear regression and correlation coefficient. The results showed that the annual maximum average NDVI in the hilly areas of central Sichuan has increased at a rate of 5.84/10a (P 0.1). The spatial distribution of annual NDVI significantly increased (31.58%) was greater than the significantly decreasing trend (2.90%). Besides, areas with significantly positive correlation and significantly negative correlation between NDVI and precipitation in summer accounted for 16.91% and 2.5% of the total area, respectively. And, the correlation between NDVI and precipitation in summer was different in different regions.
机译：川中丘陵区是长江上游地区生态脆弱的地区之一，也是生态工程建设的主体。研究区的生态环境与长江中下游地区的生态安全有关。近年来，由于气候变化，该地区的植被覆盖发生了巨大变化。因此，有必要确定研究区植被覆盖度的变化规律以及气候变化对植被覆盖度变化的影响。本文利用2001年至2015年的MODIS NDVI数据集以及55个气象站的气候数据，采用最大值合成（MVC）等方法，分析了过去15年的植被覆盖变化特征。 ，线性回归和相关系数。结果表明，四川中部丘陵地区的年平均最大NDVI以5.84 / 10a的速度增加（P 0.1）。全年NDVI的空间分布显着增加（31.58％），大于显着下降的趋势（2.90％）。此外，夏季NDVI与降水量呈显着正相关和显着负相关的区域分别占总面积的16.91％和2.5％。而且，不同地区夏季NDVI与夏季降水的相关性也不同。

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