Four urban greenbelt types including roadside greenbelt, resident-area greenbelt, landscape forest, and forest park, were simultaneously investigated in Shenzhen, China, in such measures as air temperature, air humidi...Four urban greenbelt types including roadside greenbelt, resident-area greenbelt, landscape forest, and forest park, were simultaneously investigated in Shenzhen, China, in such measures as air temperature, air humidity, wind speed, air anion ratio, and inhalabal particle concentration, which were strongly related with pleasing feeling of human body. The results show that the average air temperature in both forest park and landscape forest is much closer to the pleasing feeling of human body temperature than that of the rest two greenbelts, where it is 1.782 ℃ and 0.837℃ in forest park as well as 3.084 ℃ and 2.140 ℃ in landscape forest less than that of roadside and resident-area greenbelts, respectively. In terms of mean air humidity, forest park and landscape forest are 3.034% and 7.563% higher than that of roadside greenbelt, and 1.205% and 5.734% higher than that of resident-area greenbelt, respectively, implying a sound humidity feeling of human comfort in the former two types. The air cleanness holds a descending rank as forest park, landscape forest, resident-area greenbelt, and roadside greenbelt, whereas the rank in inhalable particle concentration is completely reverse. In general, landscape forest and forest park that mainly consist of trees have a comparatively higher feeling of human comfort whereas roadside and resident-area greenbelts fluctuate irregularly to some extent for the measures studied. The four greenbelt types investigated could be summarized in human comfort as the following descending rank, forest park, landscape forest, resident-area greenbelt, and roadside greenbelt.展开更多
Through analyzing the current urban greenbelt construction and relative issues during the development in northeastern parts in Harbin of China, some feasible solutions were proposed. In order to improve the urban ecol...Through analyzing the current urban greenbelt construction and relative issues during the development in northeastern parts in Harbin of China, some feasible solutions were proposed. In order to improve the urban ecological environment and upgrading the constructive level of the urban greenbelt along with the sustainable development in the future, the paper provided some solutions in details展开更多
Road greenbelt design is one of the important parts in urban road system.Zhangye City's road greenbelt design,relying on the general planning concept,namely,'water leads to green space,green space blends the c...Road greenbelt design is one of the important parts in urban road system.Zhangye City's road greenbelt design,relying on the general planning concept,namely,'water leads to green space,green space blends the city',emphasizes the harmonious relation between the greenbelt and ecological environment.The concept is adopted to guide the green design of the major roads,subsidiary roads,and trunk roads.It will offer some references for the similar engineering design.展开更多
为探究城市带状绿地降减空气颗粒物的作用机制和效应,选取武汉市罗家港带状公园绿地及其周边建成环境作为研究对象,选择冬季天气晴朗无风且气象条件相似的3天进行重复观测,采用土地利用回归(land use regression,LUR)模型和主成分分析...为探究城市带状绿地降减空气颗粒物的作用机制和效应,选取武汉市罗家港带状公园绿地及其周边建成环境作为研究对象,选择冬季天气晴朗无风且气象条件相似的3天进行重复观测,采用土地利用回归(land use regression,LUR)模型和主成分分析相结合的方法,分析冬季城市带状绿地对空气PM_(10)和PM_(2.5)质量浓度的降减效应,识别其关键影响因素。结果显示,基于LUR模型得出城市带状绿地对空气PM_(10)和PM_(2.5)的降减作用存在宽度效应,宽度30~40 m的绿地在冬季对空气PM_(10)的降减效率最显著。同时,研究发现冬季城市带状绿地内部的空气PM_(2.5)和PM_(10)质量浓度会出现高于邻近道路位置的现象,空气PM_(10)和PM_(2.5)在城市带状绿地内存在明显的积聚效应。结果表明,城市带状绿地对空气PM_(10)和PM_(2.5)的降减作用会受到周边交通污染排放的干扰,不同宽度带状绿地创造的微气象条件也会对空气PM_(10)和PM_(2.5)的质量浓度产生一定影响。展开更多
文摘Four urban greenbelt types including roadside greenbelt, resident-area greenbelt, landscape forest, and forest park, were simultaneously investigated in Shenzhen, China, in such measures as air temperature, air humidity, wind speed, air anion ratio, and inhalabal particle concentration, which were strongly related with pleasing feeling of human body. The results show that the average air temperature in both forest park and landscape forest is much closer to the pleasing feeling of human body temperature than that of the rest two greenbelts, where it is 1.782 ℃ and 0.837℃ in forest park as well as 3.084 ℃ and 2.140 ℃ in landscape forest less than that of roadside and resident-area greenbelts, respectively. In terms of mean air humidity, forest park and landscape forest are 3.034% and 7.563% higher than that of roadside greenbelt, and 1.205% and 5.734% higher than that of resident-area greenbelt, respectively, implying a sound humidity feeling of human comfort in the former two types. The air cleanness holds a descending rank as forest park, landscape forest, resident-area greenbelt, and roadside greenbelt, whereas the rank in inhalable particle concentration is completely reverse. In general, landscape forest and forest park that mainly consist of trees have a comparatively higher feeling of human comfort whereas roadside and resident-area greenbelts fluctuate irregularly to some extent for the measures studied. The four greenbelt types investigated could be summarized in human comfort as the following descending rank, forest park, landscape forest, resident-area greenbelt, and roadside greenbelt.
基金Supported by Program for Doctor Funds of Northeast Agricultural University (2009RC40)
文摘Through analyzing the current urban greenbelt construction and relative issues during the development in northeastern parts in Harbin of China, some feasible solutions were proposed. In order to improve the urban ecological environment and upgrading the constructive level of the urban greenbelt along with the sustainable development in the future, the paper provided some solutions in details
文摘Road greenbelt design is one of the important parts in urban road system.Zhangye City's road greenbelt design,relying on the general planning concept,namely,'water leads to green space,green space blends the city',emphasizes the harmonious relation between the greenbelt and ecological environment.The concept is adopted to guide the green design of the major roads,subsidiary roads,and trunk roads.It will offer some references for the similar engineering design.
文摘为探究城市带状绿地降减空气颗粒物的作用机制和效应,选取武汉市罗家港带状公园绿地及其周边建成环境作为研究对象,选择冬季天气晴朗无风且气象条件相似的3天进行重复观测,采用土地利用回归(land use regression,LUR)模型和主成分分析相结合的方法,分析冬季城市带状绿地对空气PM_(10)和PM_(2.5)质量浓度的降减效应,识别其关键影响因素。结果显示,基于LUR模型得出城市带状绿地对空气PM_(10)和PM_(2.5)的降减作用存在宽度效应,宽度30~40 m的绿地在冬季对空气PM_(10)的降减效率最显著。同时,研究发现冬季城市带状绿地内部的空气PM_(2.5)和PM_(10)质量浓度会出现高于邻近道路位置的现象,空气PM_(10)和PM_(2.5)在城市带状绿地内存在明显的积聚效应。结果表明,城市带状绿地对空气PM_(10)和PM_(2.5)的降减作用会受到周边交通污染排放的干扰,不同宽度带状绿地创造的微气象条件也会对空气PM_(10)和PM_(2.5)的质量浓度产生一定影响。
