SURVEY ON PAST DAMAGE RECO RDS OF WATERPOWER PLANS AND INVESTIGATION ON ES TIMATION METHODOLOGY OF SOCIAL IMPACTS CAUSED BY THE OVERFLOW WATER

Abstract

 This paper focuses on quantification methodologies for the size of impacts and effective utilization of the analyzed results, regarding with the social impacts of waterpower plants induced by natural disasters and facility accidents. Firstly, potential disaster scenarios which may cause the social impacts are analyzed through the survey on the past disaster records of waterpower plants. Then, the quantification methodologies are introduced for estimating casualities and regional ecomoic losses brought by the overflow water from the damaged facilities, which is identified to be the most anticipated scenario to be avoided. Thorough the application of one of the methodologies to the hypothetical headrace accident scenario, priority of maintenance strategies is examined from the viewpoints of economic losses and power generation benefits.