Title page for 88332012


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Student Number 88332012
Author Zhi-Yuan Wang(王治原)
Author's Email Address No Public.
Statistics This thesis had been viewed 2044 times. Download 1573 times.
Department Executive Master of Civil Engineering
Year 2001
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Study on the optimal timing for the operation of the evacuating gates
-as Keelung river in Taipei reach for case study-
Date of Defense 2002-06-27
Page Count 124
Keyword
  • evacuating gates
  • probability of risks
  • Abstract The Taipei City is crowded with a large population today. Most areas in the City were developed for commercial or residential use. Very few considerations have been given to reserving massive spaces for leisure activities. In order to enhance the living quality for citizens, the Taipei City Government plans to utilize the upper platforms of outer riverside levees as open public facilities such as parks, sports fields, or parking lots. These planning activities are often carried out at the initial design phase of maintenance projects for rivers that are classified as City-governed.
    Evacuating gates on the levees are established at proper spots. Through those evacuating gates, people and vehicles can be evacuated before the rivers overflow the platforms during the typhoon or flood seasons. At normal times, the same evacuating gates are used as entrances for engineering trucks when maintenance of those public facilities are carried out.
    When a typhoon attacks, evacuating gates must be closed in time to secure the lives and properties inside the levees. At present, the Taipei City Government relies on information provided by the Central Weather Bureau (CWB) to determine the right timing for closing evacuating gates. The Taipei City Government will inform Taipei City Government Disaster Response Center to issue press releases and close every evacuating gates in the City when the following criteria are met: a) CWB issues a terrestrial typhoon alert, b) either the water level of Tamshui River at Taipei Bridge exceeds 2.4 meters, or that of Keelung River at Tachih Bridge exceeds 3.1 meters. However, according to the data for typhoons and floods in past years, the warning water levels upon which decisions for closing evacuating gates were made are considered conservative, and could be properly adjusted.
    This study analyzes the hydraulic data resulting from typhoons and floods in past years. It evaluates the appropriateness of current practice for closing evacuating gates, and suggests new water levels for closing those gates. Due to the uncertainties of hydrology and uncontrollable engineering factors when planning hydraulic engineering projects, it is quite likely that risks still exist after the projects are completed. This study also carries out recursive analysis with accumulated probability of both water levels and the number of typhoons and floods. It probes into the probability of risks associated with different water levels for closing gates, as well as the probability of risks associated with overflowed platforms. 
    Table of Content 目錄
    目錄頁次
    中文摘要…………………………………………………………Ⅰ
    英文摘要…………………………………………………………Ⅱ
    目錄…………………………………………………………………Ⅲ
    圖目錄………………………………………………………………Ⅵ
    表目錄…………………………………………………………Ⅷ
    符號表………………………………………………………………Ⅸ
    第一章緒論……………………………………………………1
    1.1研究動機與目的…………………………………1
    1.2本文架構…………………………………………3
    第二章文獻回顧………………………………………………6
    2.1前人之研究…………………………………………6
    2.1.1河川洪水預報及預警之研究………………6
    2.1.2風險分析之研究……………………………8
    2.2國內相關法規及行政命令…………………………9
    2.2.1水利法………………………………………9
    2.2.2水利法施行細則……………………………10
    2.2.3台灣省河川管理規則………………………12
    2.2.4台北市河川管理規則………………………13
    第三章台北市防洪設施簡介及外國防洪預警措施概述……15
    3.1名詞定義……………………………………………15
    3.1.1關於河川行水區之各項名詞定義…………15
    3.1.2堤防依結構系統之分類……………………16
    3.1.3配屬於堤防用地範圍內之雨水下水道設施…………………………………………
    17
    3.1.4配屬於堤防用地範圍內提供人、車疏散之防洪設施……………………………………
    17
    3.2臺北市防洪排水設施簡介…………………………18
    3.2.1地理環境及防洪計劃說明…………………18
    3.2.2臺北市防洪排水設施設計標準……………19
    3.2.3臺北市防洪排水系統辦理情形……………19
    3.3國外防洪預警措施概述……………………………21
    3.3.1美國防洪預警措施…………………………21
    3.3.2日本防洪預警措施…………………………22
    3.3.3歐洲防洪預警措施…………………………24
    第四章防洪疏散門最佳啟閉時間之研究……………………36
    4.1研究範圍與現況概述………………………………36
    4.1.1颱洪事件樣本的選擇………………………36
    4.1.2現況水工構造物說明………………………37
    4.1.2.1堤防分佈情形…………………………37
    4.1.2.2抽水站設置情形………………………37
    4.1.2.3堤外高灘地使用狀況…………………38
    4.1.2.4防洪疏散門分佈狀況…………………39
    4.2臺北市現行防洪疏散門啟閉時機之探討…………39
    4.2.1現行防洪疏散門之啟閉機制………………39
    4.2.2現行防洪疏散門關閉水位合理性之探討…………………………………………
    41
    4.3高灘地疏散水位及防洪疏散門關閉水位之研究…………………………………………………
    43
    4.3.1研究方法……………………………………43
    4.3.1.1控制抽水站之選定……………………43
    4.3.1.2預警時間之研訂………………………44
    4.3.1.3洪水上升速率之研究…………………45
    4.3.2堤外高灘地疏散水位及防洪疏散門關閉水位之推求……………………………………
    46
    4.3.2.1堤外高灘地疏散水位之訂定…………47
    4.3.2.2防洪疏散門關閉水位之訂定…………48
    4.4風險分析……………………………………………55
    4.4.1基隆河防洪疏散門關閉水位風險分析……55
    4.4.2基隆河防洪疏散門堤外高灘地風險分析…56
    第五章結論與建議……………………………………………106
    5.1結論…………………………………………………106
    5.2建議…………………………………………………108
    參考文獻…………………………………………………110
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    Advisor
  • Ray-Shyan Wu(吳瑞賢)
  • Files
  • 88332012.pdf
  • approve immediately
    Date of Submission 2002-07-17

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