Inventory and Seismic Loss Estimation of Portland Water/Sewer Systems GIS Application to Buried Pipelinesby Leon R. L. Wang, Old Dominion Univ, Norfolk, United States,
Isao Ishibashi, Old Dominion Univ, Norfolk, United States,
Joyce C. C. Wang, Old Dominion Univ, Norfolk, United States,
Abstract: Portland, Oregon has been identified by USGS as one of the earthquake-prone areas, in which earthquake hazard mitigation is important. This project develops an efficient and realistic seismic loss-estimation model for the water and sanitary sewer systems using Portland, Oregon as an example. The scope of the project consists of (1) the formulation of a simple semi-empirical loss-estimation algorithm for the damage to water and sewer lifeline systems under different levels of earthquake ground shaking, (2) the development of the inventory of such systems using the Geographic Information System (GIS) technology and (3) the demonstration of the efficient use of loss-estimation algorithms by using two specific sewage drainage basins in Portland which contain important water and sewerage facilities. The GIS model, using a PC or a workstation, can help the small to moderate-sized city in pre-earthquake planning by identifying critical areas, and setting priorities for performing post-earthquake damage surveys, repair, or restoration of the elements of the system under the emergency situation.
Subject Headings: Geographic information systems | Buried pipes | Earthquakes | Information systems | Seismic tests | Seismic effects | Inventories | Hydrologic models | Sewers | Water conservation | Damage (structural) | Algorithms | Oregon
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