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標題: | 都市化及環境變化對都市濕地冷島效應的影響:以杭州西溪濕地為例 Impact of Urbanization and Environmental Change on Cold Island Effect of Urban Wetland:A Case Study of Xixi Wetland in Hangzhou, China |
作者: | Yi-Lun Chen 陳逸倫 |
指導教授: | 莊振義(Jehn-Yih Juang) |
關鍵字: | 都市化,都市濕地,地溫反演,冷島效應,生理等效溫度, Urbanization,Urban Wetlands,Temperature Inversion,Cold Island Effect,PET, |
出版年 : | 2018 |
學位: | 碩士 |
摘要: | 在現今全球許多大都市地區都存在明顯的都市擴張現象,這樣的都市化引起了區域環境的變化。都市土地利用變化不僅增強了都市熱島效應,還影響了都市環境下生態系統服務能力。過去的研究表明,濕地生態系統可以充分調節區域微環境,但較少研究關注都市地區中的濕地生態系統的作用。
在過去幾十年裡,中國杭州西溪濕地的覆蓋面積明顯減少,僅剩下歷史面積的六分之一,並導致了該地區溫度急劇增加。本研究的目的是量化杭州西溪濕地的減少與都市熱環境動態之間的關係,並進一步評估該區域濕地冷島效應和土地利用、環境變化、植被覆蓋指數及生理等效溫度的關係。為了解決上述問題,基於Landsat的正射和熱紅外波段遙測影像,以及利用ENVI進行地表溫度反演,來分析2000至2015年杭州西溪濕地的冷島效應受都市化及環境變化的影響,用Natural Breaks重分類方法量化冷島效應,以至於找尋其與四個潛在影響因素的關聯性。這項研究可以為杭州甚至其他類似都市化明顯地區的都市規劃及環境管理提供重要的知識背景。 Regional environmental change caused by dramatical urban expansion has become a critical environmental issue in many metropolitan areas around the world. The land use change in urban area not only amplifies urban heat island effect, but also influences the ecosystem service in the vicinity. Previous studies have indicated that wetland ecosystem could sufficiently adjust the microenvironment, but very few attentions are given to the role of wetland ecosystem in the metropolitan area. In the past decades, the coverage of Xixi wetland in Hangzhou, China has significantly decreased by six folds and has led the dramatic temperature increase in this area. The objective of this study is to quantify the relationship between the shrink of Xixi wetland coverage and the dynamics of urban thermal environment in Hangzhou, and further evaluate the change of comfort index in the past decades. To resolve the abovementioned questions, this study used ENVI to derive the surface temperature based on Landsat images. Then, the index of cold island effect is estimated from 2000 to 2015. Finally, we’ll find the relationship between land use, environmental change, NDVI and PET for cold island effect. Then the change of comfort index in Hangzhou is quantified by using several environmental and meteorological factors in the study period. The results from this study could sufficiently provide important knowledge background for urban planning and environmental management for Hangzhou and in many other metropolitan areas under severe urban expansion. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/70802 |
DOI: | 10.6342/NTU201802604 |
全文授權: | 有償授權 |
顯示於系所單位: | 地理環境資源學系 |
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