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基于RS的焦作市植被覆盖度变化研究

Study on Vegetation Coverage Change in Jiaozuo City based on RS

环境与资源 / 2024,6(3)：72-81 / 2024-10-17 66 94

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• 作者： 石娜¹      段兴明²     
• 单位：

  1．河南理工大学测绘与国土信息工程学院，焦作；
  2．重庆科技大学石油与天然气工程学院，重庆

• 关键词： 植被覆盖度；NDVI；遥感
• Vegetation coverage; NDVI; Remote sensing
• 摘要： 植被覆盖度是评估植被生长情况的一个重要指标。本文利用2015年、2018年和2021年的Landsat8-OLI归一化植被指数（NDVI）数据，对焦作市三个时期的植被覆盖度的变化趋势进行研究，首先采用像元二分模型法获取焦作市2015年、2018年和2021年的植被覆盖度，然后利用Sen趋势分析研究区内植被覆盖度的变化趋势。研究结果表明，从整体上看，2021年的低植被覆盖面积相较于2015年增加了397.3275平方千米。中低植被覆盖区，面积增加了544.2075平方千米。然而，中植被覆盖区的面积减少了326.637平方千米，中高植被覆盖区的面积减少了275.6241平方千米，高植被覆盖区的面积减少了339.2784平方千米。通过对焦作市植被覆盖度的研究，揭示了其在2015—2021年间的变化情况，为今后的生态环境保护提供了有益的参考。
• Vegetation coverage is an important index to evaluate vegetation growth. In this paper, the Landsat8-OLI normalized Vegetation Index (NDVI)data in 2015, 2018 and 2021 were used to study the changing trend of vegetation coverage in Jiaozuo City in three periods. Firstly, the pixel binary model was used to obtain the vegetation coverage of Jiaozuo City in 2015, 2018 and 2021. Then Sen trend analysis was used to analyze the change trend of vegetation coverage in the study area. The results show that overall, low vegetation cover in 2021 increased by 397.3275 square kilometers compared to 2015. The area covered by low and medium vegetation has increased by 544.2075 square kilometers. However, the area of medium vegetation cover area decreased by 326.637 square kilometers, the area of medium and high vegetation cover area decreased by 275.6241 square kilometers, and the area of high vegetation cover area decreased by 339.2784 square kilometers. Through the study of vegetation coverage in Jiaozuo City, the change of vegetation coverage from 2015 to 2021 was revealed, which provided a useful reference for ecological environment protection in the future.
• DOI： https://doi.org/10.35534/er.0603008
• 引用： 石娜．基于RS的焦作市植被覆盖度变化研究［J］．环境与资源，2024，6（3）：72-81．