A Study on the Actual State of Sewage Supply in Myon Area with a Declining Population

Abstract

In this study, we investigated the actual situation of sewage facilities in the Myon area in order to obtain the basic information necessary for establishing a sewerage development plan in areas where the population is decreasing. The phenomenon of population decline was found to be more pronounced in the Myon area than in the Eup area. Although the average operation rate of sewage treatment facilities in these areas has increased slightly, there are many places where the operation rate is increasing even though there are no factors that will increase the inflow. Hence, the possibility of an inflow of unknown water is high. In addition, the population density in the sewage treatment area in the Myon area has been continuously decreasing, and the length of sewer pipes per person is also increasing. Therefore, it is predicted that maintenance of the facility will be difficult in the future. Additionally, 74% of the sewage generated in the Myon area is treated at private sewage treatment facilities. Moreover, as a result of analyzing the efficiency of public sewage treatment facilities using data envelopment analysis, approximately 50% were found to be inefficient in terms of facility capacity and operation. Considering the situation in the Myon area, it is believed that a change in perception of public and private sewage treatment facilities is necessary when establishing a sewerage maintenance plan for areas with a declining population.