Study on the Strategy and Benefit of Adjusting Storm inundation in Southern Taipei.
| Autor: | Kuan-Chun Huang, 黃貫鈞 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 Global warming, urban heat island effect, and extreme heavy rainfall have become stronger, and flooding of water in the future will become the new normal. Domestic and international flood control and flood control strategy options, such as the “Outflow Control and Runoff Sharing” of the Water Resources Department, Low Impact Development (LID), which is mainly infiltrated in mid-latitude countries such as Europe and the United States, and the construction base regulated by the Ministry of the Interior. The volume of the "stagnation of flood detention facilities", the "outflow suppression standard" required by the "Taipei City Base Development and Discharge Standards for Rainwater and Underwater Channels", etc., functions and benefits at the urban or regional scale, with a view to creating a Taiwanese city that is not afraid of flooding The "resilient city" is the main topic to be explored in this study. In the face of heavy rain flooding frequency and volume increase, taking Taipei City as an example, the main difficulties in improving flooding problems include: 1. Rainwater and underwater waterway renewals hurt money, disturb people, and difficulties. 2. Rainstorm intensity and total amount are greater than those in mid-latitude countries. 3. The city has been built, the construction site is almost saturated, the green space is limited, and the low-impact development strategy to reduce the peak value of the high-recurrence storm runoff is low or ineffective. This study considers the current situation and governance dilemma of Taipei City, and proposes three engineering strategies and a contingency strategy: 1. Grooming strategy: road guidance; 2. Sponge strategy A: public land and open space for construction provide flood detention volume, absorb road excess Flooding; 3. Sponge Strategy B: (more) the new base provides “storage flood storage volume”, upper and middle travel “suppressed outflow” and downstream “accumulate road over flooding”; and 4. defense strategy: building construction The water sluice gate, the government "develops the urban flooding potential real-time forecasting system", informs the people in the flooded area 30 minutes in advance, and deploys the sluice gate. In this study, EPA-SWMM was used as a simulation tool. The Daan District of Taipei City was used as an example to evaluate the benefits of the first three strategic combinations. The defensive strategy can assist the people to install the sluice gate according to the flooding depth of the case simulation. Take Daan District, Taipei City, which is prone to local flooding, as an example. Using design rainfall and actual event rainfall, simulate the combination of road guidance, open space flood detention, and prevention of flooding intrusion strategies for flooding depth reduction and impact reduction. Among them, the road guide design can reduce the maximum flooding depth by about 60%, and then add the open space descent and 10% area of 78mm "storage and detention facilities", which can reduce the maximum flooding depth by about 70%. The simulation case found that if there is no road guide, the flooding cannot be diffused and it is easy to accumulate locally, and the flooding depth is too large; if there is no flood detention volume, the flooding cannot be reduced, but the downstream is transferred, but it will intensify the downstream flooding; After using the road guide and the flood detention volume strategy in Da''an District, the internal flooding caused by short-time heavy rainfall will not invade the underground space and buildings. Finally, before implementing road guidance, storage and detention facilities, and public space flood detention strategy, it is recommended to develop flooding potential forecast in the future, notify individuals, communities, etc. about 30 minutes in advance, and install a damper, a tropical island-type climate in Taiwan. Can truly become a resilient city that is not afraid of flooding. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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