本文關鍵詞：蘇州城市不同類型用地碳排放特征及估算方法研究　出處：《中國礦業(yè)大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 碳排放 城市用地 實驗模擬 估算模型

【摘要】：目前,城市已成為全球碳排放的主要區(qū)域,城市碳排放對全球碳循環(huán)和氣候變化產(chǎn)生了深遠的影響。城市土地利用可以直接影響陸地生態(tài)系統(tǒng)與大氣之間的碳循環(huán)過程,而由于城市人類活動劇烈導致碳排放的作用機理更加復雜,使得開展城市生態(tài)系統(tǒng)碳循環(huán)研究已成為全球氣候變化研究中最復雜、最迫切的工作之一。因此,研究城市土地利用過程中碳排放具有重要的理論和現(xiàn)實意義。本文在國內(nèi)外研究的基礎上,結(jié)合城市用地分類及碳源類型,選取了城市住宅用地、教育科研用地和工業(yè)用地作為研究對象,分析了其碳源構成及二氧化碳濃度隨時間變化特征,結(jié)果表明:城市不同類型用地的二氧化碳濃度日變化特征具有較好的時間規(guī)律性。其次,運用實驗法和模擬法,設計了室內(nèi)外二氧化碳排放實驗,并基于FLUENT模擬了室內(nèi)二氧化碳排放實驗,結(jié)果表明:地表二氧化碳擴散受重力作用具有沉積性,受湍流作用具有隨機性,而基于FLUENT的二氧化碳室內(nèi)排放模擬與室內(nèi)實驗結(jié)果能夠較好地吻合。再次,基于FLUENT室內(nèi)模擬結(jié)果,采用數(shù)學模型法,建立并檢驗了城市土地利用碳排放量估算模型,結(jié)果顯示:二氧化碳排放量的模型估算結(jié)果為41828mg,而實際的CO2排放量為49425mg,兩者之間相差7597mg,約占實際排放量的15%,表明模型有一定的可靠性,具有較高的精度。最后,以星韻花園社區(qū)為例,運用實證研究法,分別基于模型和實地調(diào)研數(shù)據(jù)估算了社區(qū)2015年1月的二氧化碳排放量。結(jié)果顯示:基于實地調(diào)研數(shù)據(jù)的社區(qū)日均二氧化碳排放量為436.12Kg,而模型估算的社區(qū)日均二氧化碳排放量為294.71Kg,約占實地調(diào)研結(jié)果的68%。
[Abstract]:At present, cities have become the major regions of global carbon emissions. Urban carbon emissions have a profound impact on the global carbon cycle and climate change. Urban land use can directly affect the carbon cycle between terrestrial ecosystems and the atmosphere. Because the mechanism of carbon emission is more complex due to the intense human activities in cities, the research on carbon cycle of urban ecosystem has become one of the most complex and urgent work in the study of global climate change. It is of great theoretical and practical significance to study carbon emissions in the process of urban land use. Based on the research at home and abroad, this paper selects urban residential land based on the classification of urban land and the types of carbon sources. The carbon source composition and carbon dioxide concentration of educational research land and industrial land were analyzed. The results show that the diurnal variation of carbon dioxide concentration in different types of land in cities has a good time regularity. Secondly, the indoor and outdoor carbon dioxide emission experiments are designed by means of experimental method and simulation method. The indoor carbon dioxide emission experiments are simulated based on FLUENT. The results show that the surface carbon dioxide diffusion is sedimentary by gravity and stochastic by turbulence. The results of indoor carbon dioxide emission simulation based on FLUENT are in good agreement with the results of indoor experiments. Thirdly, based on the results of FLUENT indoor simulation, the mathematical model method is adopted. A carbon emission estimation model for urban land use was established and tested. The results show that the carbon dioxide emission model is estimated to be 41828 mg, while the actual CO2 emission is 49425 mg. The difference between the two is 7597 mg, about 15% of the actual emissions, indicating that the model has a certain degree of reliability and high accuracy. Finally, taking the community of star rhyme garden as an example, the empirical research method is used. Community CO2 emissions in January 2015 were estimated based on the model and field survey data respectively. The results showed that the average daily carbon dioxide emissions of communities based on field survey data was 436.12kg. The model estimated that the average daily carbon dioxide emissions in the community were 294.71 kg, which accounted for 68% of the field survey results.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：F301.2;X321

【參考文獻】

相關期刊論文 前2條

1 魏利軍,張政,胡世明,吳宗之;重氣擴散的數(shù)值模擬模型驗證[J];勞動保護科學技術;2000年03期

2 朱雪梅;江海燕;肖榮波;吳婕;;廣州居住區(qū)碳排放特征及對低碳社區(qū)的啟示[J];中國人口.資源與環(huán)境;2014年S1期

，

本文編號：1362731