초록 close

The preassure drop below the desired level by pipe failures in water distribution network causes service failure and insufficient water pressure areas. To reduce inconvenience of consumer caused by water pressure drop, these areas need to be predicted accurately. This kind of prediction technique will allow network managers to take appropriate and rapid action, and thus improving the service quality of water supply. For more accurate prediction of the insufficient water pressure area, a functional relationship between water pressure and demand has to be considered. However, the conventional analysis method assumes that all nodal water demands are always constant, even though the water pressure is not sufficient to supply at each node. Therefore, pipe flows can not be estimated correctly, and the insufficient water pressure areas are overestimated than actual. In this study, a new analysis method that can consider the functional relationship between pressure and water demand is suggested. Also, the model network and the real network were analyzed by simulating various pipe failure conditions to compare the results from both methods.As a result, suggested method was found to be more applicable and more accurate for predicting the network behavior under insufficient pressure condition caused by pipe failure in the network.