Flood Risk Assessment and Establishment of Flood Prevention Map ─ Taking New Taipei City as a Case Study
Date Issued
2011
Date
2011
Author(s)
Wu, Yi-Ting
Abstract
With the geographic location and fragile geological condition, Taiwan encounters many natural disasters such as earthquake, typhoon, and flood, etc. every year. Because of the high density of population and intensive land use, these inundation disasters usually cause a lot of damages. Risk management for natural hazard is becoming an important issue. The objectives of this study are to establish a framework of flood risk assessment and to design prevention maps taking New Taipei City as an example. Annual average risk (AAR) is composed of vulnerability and annual average hazard (AAH). The AAR is made of the analytical results of expert questionnaire, analytic hierarchy process method (AHP), socioeconomic data and inundation potential material. The AAR system simulation is used to construct the hazard frequency curve in region at AAH.
The study found that the high AAR areas are concentrated in the bank along Ta-Liao-Keng river, Keelung river, and Tamsui river in Xinzhuang, Xizhi, and Tamsui, respectively. This research selects 3 areas from the high AAR regions as the example for prevention maps. Assess according to the real examples of district temporary shelters, evacuation regions, and flood areas, etc.
The achievement of the research can be applied to risk mitigation of our national territory space plans by relevant units in the future, or used by related research or used for risk insurance. Flood prevention maps can be an alternative of flood potential maps for being a regard of building design specifications.
Subjects
Analytic Hierarchy Process
Hazard
Annual Average Hazard
Prevention Map
Type
thesis
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