Principal Component Analysis Method Applying to Earthquake-damaged Reservoir's Comprehensive Evaluation

Abstract Earthquake-damaged reservoir's comprehensive evaluation involves many factors, which are related to each other. Four reservoirs in Sichuan Province were chosen, using principal component analysis for assessment. First the data were standardized, and correlation matrix was got. Then the principal component and its weight were confirmed. Principal component's score and total score were received. Finally earthquake-damaged reservoir's risk grades were determined and they could be ordered. Once emergency happens, the reservoirs’ grades will be dam-break danger, high-risk, secondary high-risk and slight danger. The result will be objective and reasonable, and earthquake-damaged reservoirs can be assessed easily, providing technical support for earthquake-damaged reservoir's management.