Replacement Prioritization of Water Distribution Pipes of the Taipei Water Department

Replacement Prioritization of Water Distribution Pipes of the Taipei Water Department

The water distribution pipelines of the Taipei Water Department are planned to be upgraded to NS pipes. This study collates and verifies the engineering borehole data in the Taipei Basin. The liquefaction susceptibility category map and the liquefaction potential map are updated according to the liquefaction critical acceleration of each site. To utilize the limited annual replacement budget, using the water supply district as a unit, three major indicators, namely seismic hazard potential, pipeline vulnerability, and replacement benefits, are taken into consideration in the prioritization scores for the replacement of existing water distribution pipelines. Three types of disaster scenarios, representing large near-field, moderate near-field, and large far-field earthquakes, are also selected to explore the rationality of the weight settings for seismic hazard potential and pipeline vulnerability.