Determination of Proper Water Supply Rate for Emergency Interconnection Plan

Abstract

The deterioration of water supply networks leads to frequent accidents, such as pipe failure, which result in water service interruptions. Depending on the type of accident, a large-scale water service interruption can occur. Therefore, an emergency interconnection plan has been established to prevent interruptions in water service. However, most emergency interconnection plans only consider whether water can be supplied to the region of water service interruption. The area that can actually supply water, emergency water supply area (EWSA), and the possible time required to supply water, emergency water supply time (EWST) are not usually considered. Furthermore, in cases wherein the adjacent local governments or adjacent water supply blocks have insufficient water for the region of water service interruption, it is a good practice to increase the possible water supply time by the reducing the water supply rate (WSR) in order to minimize the damage from the water service interruption. In this study, a method is suggested to determine the proper WSR required to minimize the damage when the amount of emergency water is insufficient. Since it is a case where the amount of emergency water is not sufficient, A-PDA is used to simulate EWSA and EWSA for each WSR. The simulation results are subsequently converted into the customer satisfaction index for each WSR. Through this procedure, the proper WSR can be determined, thereby improving both customer satisfaction and water supply time. Finally, this method is applied to a real water supply network to verify its applicability.