Abstract
The methods for simulating the water quality in pipe network were studied by using finite element method. New analytical methods for estimating the flow path from a distribution tank to the observed point and retention time in every pipe path were proposed. Triharomethane (THM) and residual chlorine concentration were selected as indexes of water quality in a pipe network. The equation of THM formation rate was established based on the results of laboratory experiments. Considering the condition of joint or branch, THM and residual chlorine concentration in each pipe node were estimated. Comparing the analytical results with measured values the proposed method was shown to be available.
