유수율 향상 예측 및 사업 투자비 산정에 관한 연구

Abstract

According to the ministry of environment of Korea, the average revenue water ratio was as high as 85% for the entire country in 2015. But the water revenue ratio of the small counties were as low as 60%. This means about 40% of produced water is leaked to the ground of no use. Therefore, many counties make an effort to increase water revenue ratio. In this study, The five small counties are selected as samples to develope the model of forecasting revenue water ratio and investment prediction model. Those small counties have executed advanced pipe network system such as construction of block system and GIS DB, real time monitoring of leakage and network management system, water pressure management and old pipe replacement. The models were developed based on regression analysis. The models were verified by adopting the other county, which has constructed advanced pipe network system. Two factors, the elapsed time of adopting advanced pipe network system and the replacement ratio of old pipe, were selected as control parameters in this model. Between the two factors, the elapsed time of adopting advanced pipe network system was more important than the other factor; the replacement ratio. According to the models, about six years are required to increase 20% of the water revenue ratio. Based on the result 10% increase of water revenue ratio costs 1.3 million won for the each water faucet.