IDENTIFICATION OF KEY LOCAL FACTORS INFLUENCING REVENUE WATER RATIO OF KOREAN CITIES USING PRINCIPAL COMPONENT ANALYSIS AND CLUSTERING ANALYSIS

In order to identify the relation between revenue water (RW) ratio and key local factors in a quantifiable way, 90 effect factors were considered as regional characteristics for 79 Korean cities. Seven statistically significant effect factors were chosen through correlation analysis. According to the result, it was suggested that a shorter length of distribution system, a water supply with smaller number of bigger customer meters and gravitational supply through reservoir would be advantageous from a RW ratio's point of view.