天水市麦积区大气总悬浮颗粒物与绿地分布的关系研究

Study of relationship of aerosols and urban green space in Maiji district,Tianshui

以麦积区城郊2013年实测绿地大气总悬浮颗粒物（TSP）为根据,应用空间变异分析、克里格插值、重分类等方法,对麦积区城郊绿地大气TSP进行了分析,得出如下结论：当绿地结构是乔木和灌木组成的针阔混交林、森林覆盖率在73%时,大气TSP质量浓度小于0.08mg/m3;当绿地结构是天然林、小部分经济林和绿化带组成的阔叶林、森林覆盖率在51%时,大气TSP质量浓度为0.08~0.20mg/m3;当绿地结构是经济林、绿化带和农田、森林覆盖率在30%以下时,大气TSP质量浓度在0.20mg/m3以上;森林覆盖率在10%左右时,大气TSP质量浓度在9.700~13.548mg/m3。麦积区城市绿地结构和森林覆盖率直接影响大气TSP浓度,这为麦积区城市绿地规划和建设、改善城市环境质量提供了理论依据和技术指导。

Based on data collected from Maiji district in 2013,the study analyzed aerosols in the vegetated area of Maiji district by using methods such as semi-variation analysis,Kriging interpolation,reclassification.The results were as follows：when the forest coverage rate was 73%,and when the greenbelt structure was theropencedrymion composed of trees and shrubs,the concentration of atmospheric suspended matter was the below 0.08 mg/m3;when the forest coverage rate was 51%,and the greenbelt structure was broad-leaved forest composed of natural forest,small proportion of economic forest and greenbelt,the concentration of atmospheric suspended matter was 0.08 mg/m3 to0.20mg/m3;when the greenland structure was greenbelt and farmland,the forest coverage rate was below 30%,the concentration of atmospheric suspended matter was the above 0.20mg/m3,and the forest coverage rate was 10%,the concentration of atmospheric suspended matter was 9.700mg/m3 to 13.548mg/m3.The concentration of atmospheric suspended matter have been direct effect by the forest coverage rate and the greenbelt structure in Maiji district.A theoretical foundation and a technical guidance provided for the green space planning and construction in Maiji district and also for the improvement of urban environmental quality.