비상시 수계전환 수리해석을 위한 A-PDA모형의 적용

The water distribution system is an important social infrastructure providing customers with stable and safe water supply. The fact, however, is that it is not free from various abnormal situations arising from internal / external factors. In case of a water supply failure due to an abnormal situation, the emergency interconnected operation between adjacent blocks in the system is one of the most effective countermeasures. To simulate these types of emergency operations, existing hydraulic analysis model which are based on infinite source assumption may result in unrealistic results such as negative pressure at demand nodes. Having more realistic simulation results from these situations, it is required to use an A-PDA model considering the reservoir volume and the inflow volume of the reservoir. With this consideration, the A-PDA model can simulate the condition of the limited amount of water supply. We apply the A-PDA model to the emergency interconnected operation between adjacent blocks in a city in Korea and find that more realistic results can obtained comparing with the results obtained from the PDA model which is based on the unlimited water supply.