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应用生态学报 ›› 2019, Vol. 30 ›› Issue (11): 3855-3862.doi: 10.13287/j.1001-9332.201911.018

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南昌市中心城区绿地景观对PM2.5的影响

李琪1,2, 陈文波2*, 郑蕉3, 谢涛1,2, 卢陶捷1,2   

  1. 1江西农业大学国土资源与环境学院, 南昌 330045;
    2南昌市景观与环境重点实验室, 南昌 330045;
    3江西农业大学计算机与信息工程学院, 南昌 330045)
  • 收稿日期:2019-02-25 出版日期:2019-11-15 发布日期:2019-11-15
  • 通讯作者: * E-mail: cwb1974@126.com
  • 作者简介:李 琪, 女, 1993年生, 硕士研究生. 主要从事土地资源利用研究. E-mail: 1822530682@qq.com
  • 基金资助:
    本文由国家自然科学基金项目(41561043)资助

Influence of greenspace landscape pattern on PM2.5 in the center urban area of Nanchang, China

LI Qi1,2, CHEN Wen-bo2*, ZHENG Jiao3, XIE Tao1,2, LU Tao-jie1,2   

  1. 1College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China;
    2Nanchang Key Laboratory of Landscape and Environment, Nanchang 330045, China;
    3College of Computer and Information Engineering, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2019-02-25 Online:2019-11-15 Published:2019-11-15
  • Contact: * E-mail: cwb1974@126.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41561043)

摘要: 随着我国城市化工业化的快速发展,大气环境质量问题越来越受到重视,PM2.5作为重要的大气污染物,已经引起了公众的普遍关注.城市绿地作为一种半自然的地表景观能在一定程度上影响PM2.5的浓度与分布,目前的研究主要集中在微观尺度上,在景观尺度上的研究还不多见.本研究采用土地利用回归模型进行监测点加密,基于普通克里格插值法实现PM2.5浓度的空间分布高精度模拟.然后与通过遥感解译的城市绿地进行耦合,定量分析了城市绿地景观特征、质量等对PM2.5浓度的影响.结果表明:研究区PM2.5浓度由市中心向周边不断递减;绿地类型对PM2.5浓度影响显著;绿地斑块形状对PM2.5浓度没有显著影响;绿地斑块的面积、质量与PM2.5浓度呈显著负相关.研究区绿地景观对PM2.5消减作用距离小于100 m.在消减作用距离内,距离绿地斑块越近,PM2.5浓度越低.其中,附属绿地和公园绿地对PM2.5浓度的消减作用距离大于其他绿地类型.

Abstract: With rapid urbanization and industrialization, more attention has been paid to atmosphere quality in China. PM2.5, an important atmospheric pollutant, has attracted widespread public attention. Urban greenspace as a semi-natural surface landscape can affect the concentration and distribution of PM2.5. Current studies mainly focus on micro-scale, with few on landscape scale. In this study, land use regression (LUR) model was used to densify monitoring points. Based on ordinary Kriging interpolation method, the spatial distribution of PM2.5 concentration was simulated with high precision. We quantitatively analyzed the impacts of urban greenspace landscape characteristics and quality on PM2.5 concentration by coupling urban greenspace interpreted by remote sensing. The results showed that PM2.5 concentration decreased from central area to periphery. The impacts of greenspace on PM2.5 concentration varied with greenspace types. The shape of greenspace had no effect on PM2.5 concentration, while the area and quality of greenspace were significantly negatively correlated with PM2.5 concentration. In general, the greenspace had an obvious PM2.5 reduction effect in the distance of less than 100 m. Within the reduction distance, the closer to the greenspace, the lower the PM2.5 concentration was. The reduction distance of the affiliated and park greenspace was larger than other greenspace types.