Importance of demand modelling in network water quality models: a review

Drinking Water Engineering and Science

J. H. G.Vreeburg¹  E. J. M.Blokker¹  S. G.Buchberger¹  J. C.van Dijk¹ 

DOI  :  10.5194/dwes-1-27-2008

学科分类：工程和技术（综合）

来源: Copernicus Publications

【 摘 要 】

Today, there is a growing interest in network water quality modelling. Thewater quality issues of interest relate to both dissolved and particulatesubstances. For dissolved substances the main interest is in residualchlorine and (microbiological) contaminant propagation; for particulatesubstances it is in sediment leading to discolouration. There is a stronginfluence of flows and velocities on transport, mixing, production and decayof these substances in the network. This imposes a different approach todemand modelling which is reviewed in this article.

For the large diameter lines that comprise the transport portion of atypical municipal pipe system, a skeletonised network model with a top-downapproach of demand pattern allocation, a hydraulic time step of 1 h, anda pure advection-reaction water quality model will usually suffice. For thesmaller diameter lines that comprise the distribution portion of a municipalpipe system, an all-pipes network model with a bottom-up approach of demandpattern allocation, a hydraulic time step of 1 min or less, and a waterquality model that considers dispersion and transients may be needed.

Demand models that provide stochastic residential demands per individualhome and on a one-second time scale are available. A stochastic demandsbased network water quality model needs to be developed and validated withfield measurements. Such a model will be probabilistic in nature and willoffer a new perspective for assessing water quality in the drinking waterdistribution system.

【 授权许可】

Unknown