METHOD FOR LEADING OUT CONCENTRATION OF CHLORINE IN WATER DISTRIBUTION PIPE NET

摘要

PURPOSE: To estimate a damping coefficient at every caliber to enhance operation accuracy using the estimate value in a method for leading out the concn. of chlorine in a water distribution pipe net. CONSTITUTION: Operation setting the chlorine damping coefficient of a pipeline having a specific caliber to kd and the chlorine damping factor of a pipeline having other caliber to 0 to calculate the arrival time td of a water lump in the pipeline having the specific caliber is performed to all of pipelines different in caliber. An actually measured residual chlorine concn. Ct at time (t) at a predetermined place is operated and led out in a time series manner by adapting an operation formula Ct =C0e×p [Σ(-kd td )] (wherein C0 is the chlorine concn. of a water source, kd is the chlorine damping coefficient of the pipeline having the specific caliber and td is an arrival time by a caliber) to calculate an error formula Ft (kd ) =Ln(Ct /C0 )-Σ(-kd td ) and the chlorine damping coefficient ld at every pipeline different in caliber minimizing the square sum G (kd ) =ΣFt (kd )}<2> thereof.