發(fā)布時(shí)間：2018-03-28 07:37

  本文選題：交通指數(shù)　切入點(diǎn)：交通密度　出處：《生態(tài)學(xué)報(bào)》2017年03期

【摘要】：快速城市化導(dǎo)致城市熱島效應(yīng)不斷加劇,超大城市的車輛排熱是影響城市熱環(huán)境的重要因素之一。以北京五環(huán)區(qū)域?yàn)檠芯繀^(qū),通過交通指數(shù)、交通密度、道路長度等指標(biāo)計(jì)算了交通道路排熱強(qiáng)度,辨識(shí)出北京市區(qū)街道尺度上車輛排熱的時(shí)空動(dòng)態(tài)規(guī)律;選擇典型位點(diǎn)對(duì)小氣候特征進(jìn)行流動(dòng)與連續(xù)監(jiān)測(cè),構(gòu)建空間與時(shí)間序列上車輛排熱與小氣候特征的定量關(guān)系。結(jié)果表明,交通排熱強(qiáng)度呈現(xiàn)輻射狀空間分布,市區(qū)平均排熱強(qiáng)度為8.6—10.8 W/m~2,三環(huán)內(nèi)地區(qū)達(dá)32.2—53.9 W/m~2,白天平均排熱強(qiáng)度約為夜間的2—10倍,且早晚高峰期排熱強(qiáng)度最大,非工作日的排熱空間特征同工作日并無明顯差異;主要道路的溫差同08:00時(shí)的交通排熱相關(guān)性最顯著,溫差增幅為0.91℃/10 W/m~2;車輛排熱與道路草地監(jiān)測(cè)點(diǎn)的溫差有顯著正相關(guān)關(guān)系,溫差增幅約為0.15℃/10 W/m~2,且排熱對(duì)其溫差有約10—20分鐘的滯后效應(yīng)。車輛排熱的時(shí)空動(dòng)態(tài)研究有助于科學(xué)規(guī)劃城市道路和景觀,改善城市熱環(huán)境。
[Abstract]:Rapid urbanization leads to the increasing effect of urban heat island. Vehicle heat emission is one of the important factors that affect the urban thermal environment in megacities. Taking the five rings of Beijing as the study area, traffic index, traffic density, The road length and other indexes are used to calculate the heat intensity of the traffic road, to identify the space-time dynamic law of the vehicle heat emission on the street scale in Beijing, and to select the typical sites to carry out the flow and continuous monitoring of the microclimate characteristics. The quantitative relationship between vehicle heat emission and microclimate characteristics in space and time series is established. The results show that the intensity of traffic heat emission is radiative spatial distribution. The average heat discharge intensity in urban area was 8.6-10.8 W / m ~ (2), in the third ring area 32.2-53.9 W / m ~ (2), the average heat discharge intensity in daytime was about 2-10 times of that in night, and the peak heat discharge intensity in the morning and evening was the highest, and the spatial characteristics of non-working day heat discharge were not significantly different from that of the working day. The temperature difference of the main road is the most significant correlation with the traffic heat discharge at 08:00, the increase of the temperature difference is 0.91 鈩，

本文編號(hào)：1675384