抄録
In the former report, it is necessary to calculate still in detail though calculating simulation program which can calculate the water replacing duration inside residential piping, and several water supply consumption of each water supply appliance as the foundation of diagnostic program. So, in order to calculate as accurate value as possible by this report, it was decides to be calculated by giving change about the water replacing duration to time of each water supply appliance, and the development of the calculation simulation program to diagnose the water quality degradation about the residual chlorine concentration based on the value was done.
