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標題: | 短延時強降雨事件下的都市交通路網指派策略研究 A Study of Urban Traffic Assignment Strategies upon Short-Duration Intense Rainfall Events |
作者: | Chi Chang 張霽 |
指導教授: | 許聿廷(Yu-Ting Hsu) |
共同指導教授: | 賴進松(Jihn-Sung Lai) |
關鍵字: | 動態交通指派,車流模擬,都市淹水,氣候變遷,短延時強降雨事件, Dynamic traffic assignment,Traffic flow simulation,Urban inundation,Climate change,Short-duration intense rainfall, |
出版年 : | 2020 |
學位: | 碩士 |
摘要: | 隨著氣候變遷帶來的全球暖化以及極端天氣事件的影響,這些全球變遷也進一步影響地方性的天氣系統。近年來台灣也面臨更多從颱風和區域對流系統帶來的集中性強降雨,特別是都市擴張及人口成長更使得民眾暴露在災害中的風險提升,因此對於社會來說淹水事件和都市系統的交互作用變成很重要的課題。在本研究中,我們主要探討短延時強降雨造成的淹水事件對都市車流及路網造成的影響,透過中觀車流模擬來看由新北市與台北市的部分區域所建構的路網,藉由原始的道路容量、部分限縮的道路容量與路段完全關閉來模擬強降雨以及淹水深度的動態變化。根據不同交通指派結果以及不同事件情境的分析,本研究探討脆弱度較高的路段:淹水風險較高或是交通堵塞風險較高的地區出現的原因,另外也透過退水情境的模擬來比較排水系統改善對交通路網的復原程度,最後比較大眾運輸系統以及調撥車道等可行交通指派方法來看對平均旅行時間的影響。本研究希望透過淹水情境模擬以及中觀車流模擬結合的方式,提供面對短延時強降雨等極端天氣事件時,都市交通系統的脆弱度分析及可行的車流指派策略,並以都市韌性為核心做災害管理相關研究,作為未來政策及緊急事件應變的參考。 Climate change has been leading to global impact in two different aspects: global warming and extreme weather events. These global changes can also directly influence the subordinate hierarchy, such as regional weather systems. More frequent events of concentrated precipitation with increasing intensity have been observed in Taiwan in recent years. Not only Typhoons but some regional convective systems can cause severe inundation in urban areas. Moreover, the population growth and urban expansion increase the exposure to the hazards. Hence, the interactions between inundation events and urban systems can be a crucial issue to the society. In this study, we focus on the effect of floods on urban traffic flows. Upon the scenario of high rainfall intensity concentrated in short duration and the consequent flood, the road capacity in urban area can be severely reduced or even disrupted. A mesoscopic traffic simulation model is constructed to capture and clarify the dynamic relationships between rainfall, inundation and traffic flows. The simulation environment is developed within a specific urban area in Taipei City, Taiwan, where the road capacity is subject to the depth of flooding water and may vary over time. The road capacity plays an important role in the traffic assignment problem since the variances among unimpeded and different levels of blocked conditions can directly affect flow dynamics. Based on the simulation of different objectives for traffic assignment, routing strategies over alternate roads and critical links are identified. The traffic network influenced by different rainfall and flood recession scenarios are also studied. The relevant research findings can help traffic network operators better prepare for or respond to the deteriorated traffic conditions before or during such short-duration intense rainfall events resulting from extreme weather. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69672 |
DOI: | 10.6342/NTU202003917 |
全文授權: | 有償授權 |
顯示於系所單位: | 土木工程學系 |
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