建筑室外绿地负氧离子环境空间分异特征研究

STUDY ON THE CHARACTERISTICS OF SPATIAL DIFFERENTIATION OF THE NEGATIVE AERO-ION ENVIRONMENT IN OUTDOOR GREEN SPACE

负氧离子是反映城市绿地生态功能进而评价城市空气质量的基本参数之一。本项目以地处北京市的某建筑室外绿地为例,采用定点实测及空间插值方法分析和探讨典型建筑室外绿地负氧离子环境的空间分异特征。结果表明:试验样地的负氧离子环境呈现显著的空间分异特征且与植物和水体等景观元素空间分布具有相关性;负氧离子标准值与绿地植物郁闭度及叶面积指数相关性均呈现正相关关系。本研究为营建及管理科学合理的城市绿地提供了科学依据。

Negative aero-ion(NA) is one of the basic parameters to reflect the eco-function of urban green space and evaluate urban air quality. Presented in this paper is a case of typical outdoor green space located in Beijing city, and the characteristics of spatial differentiation of NA environment in outdoor green space of typical buildings were analyzed and discussed by the fixed-point measurement and spatial interpolation by fixed point measurement and space interpolation. Results of the study shows the spatial correlation between NAB and the factor of the green space, such as plant landscape and waterscape, is significant in some areas but not throughout in the green;and positive correlation between the standard values of NA and the canopy density, leaf area index. Based on the above results, the study offers scientific basis for the construction and management of scientific urban green spaces.