American Society of Civil Engineers


Integrated Water Quality Modeling of Water Distribution Systems


by M. A. Andrade, (Department of Agricultural and Biosystems Engineering, The University of Arizona Tucson, Arizona, USA), F. Rojano, (Department of Agricultural and Biosystems Engineering, The University of Arizona Tucson, Arizona, USA), P. Romero-Gomez, (Department of Agricultural and Biosystems Engineering, The University of Arizona Tucson, Arizona, USA), and C. Y. Choi, (Department of Agricultural and Biosystems Engineering, The University of Arizona Tucson, Arizona, USA)
Section: Water Quality, pp. 670-677, (doi:  http://dx.doi.org/10.1061/41203(425)63)

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Document type: Conference Proceeding Paper
Part of: Water Distribution Systems Analysis 2010
Abstract: An accurate water quality modeling tool will be essential for many municipalities that must design or upgrade distribution systems. If network models are to remain effective tools for designing, operating, and managing drinking water distribution systems, it will become necessary to expand existing water quality algorithms so as to properly account for mixing at pipe junctions and unsteady dispersion along pipe links. While these upgrades would present new challenges for water quality modeling in water distribution networks, they would also provide an urgently needed second-generation modeling capability. In this study, we focus primarily on integrating both junction mixing and axial dispersion phenomena with the following steps: First, we use hydraulic calculations in a selected network to provide the database for the water quality simulations that involve incomplete mixing at junctions. Second, we employ a one-dimensional dispersion-advection model, integrated with recently developed coefficients, to produce transient water quality results for the network. The results are then quantitatively compared with those obtained based on the conventional assumptions; i.e., complete mixing and advection-only solute transport. Overall, this study outlines ongoing research efforts aimed at implementing the nodal mixing and dispersive behavior of soluble matter in steady and unsteady pipe flow regimes into the water quality model.


ASCE Subject Headings:
Water quality
Water distribution systems
Hydraulic models