Performance of Interdependent Lifelines in the Pacific Northwest Resulting from an Earthquake on the Cascadia Subduction Zone: A Portland Example

摘要

The Oregon Resilience Plan (ORP) was developed in 2013 by the State of Oregon to reduce risk and improve recovery during and following a Magnitude (M) 9.0 earthquake and tsunami. The Portland Water Bureau (PWB) hired InfraTerra, Inc. to help them prepare a Water System Seismic Study (WSSS) of the PWB water system. PWB and InfraTerra determined the seismic performance of PWB's water system in an M 9.0 earthquake and developed mitigation actions to meet the target states of recovery (TSoR) provided in the ORP. The study findings highlighted the significant interdependence of the water system and other lifeline systems and the critical need to invest in mitigation projects and water system improvements.