3 November 2008 Earthquake damage scenario simulation of a water supply system in Taipei
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Proceedings Volume 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments; 71431P (2008) https://doi.org/10.1117/12.812590
Event: Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 2008, Guangzhou, China
Abstract
Taiwan is located in the Circum-Pacific Belt and at the junction of the Philippine Sea Plate and the Eurasian Plate. The island is squeezed over a long period of time, so the frequency of the occurrence of earthquakes is very high. Changes of terrain due to seismic forces such as fault ruptures and surface uplifts could cause extensive damage to water pipeline networks. The 921 Ji-Ji earthquake was one of the most serious disasters in recent years in Taiwan, and it indeed resulted in the most severe damage of water supply systems. The urban water supply network is very important for municipal water management in Taiwan. If the water supply systems break down, hospitals and fire stations will not have enough water to carry out the rescue work, and the results may worsen the disasters. This study took the water supply system of the West District in Taipei City as an example. First, the metro-Taipei area was split into three hundred and twenty-seven 1 km by 1 km cells. Second, the location of a simulated earthquake was determined. Third, the Peak Ground Acceleration (PGA) value of each cell was calculated by an empirical formula. Fourth, the Repair Rate (RR) of each cell was calculated based on its PGA value. Fifth, using the GIRAFFE software developed by Cornell University, the Monte Carlo simulation method was used to simulate the possible damage to the water supply system. And finally, the EPANET program developed by the US Environmental Protection Agency was applied to compute the distribution of flow volumes and water pressures of the damaged water supply system. Results of the pipeline network under different scenarios of earthquake magnitudes are shown in this study, and they provide an evaluation basis to decision makers to improve the pipeline infrastructures for fire protection after major earthquakes.
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Ji-Hao Lin, Walter W. Chen, "Earthquake damage scenario simulation of a water supply system in Taipei", Proc. SPIE 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 71431P (3 November 2008); doi: 10.1117/12.812590; https://doi.org/10.1117/12.812590
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