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    Modeling in-sewer erosion to predict sewer flow quality

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    Publication date
    2003
    Author
    Tait, Simon J.
    Ahyerre, M.
    Chebbo, G.
    Skipworth, P.J.
    Keyword
    Deposition
    Sediments
    Erosion
    Sewers
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    High levels of suspended solids are typically observed during the initial part of storms. Field evidence suggests that these suspended solids derive from the erosion of in-sewer sediment beds accumulated during dry and previous wet weather periods. Suspended sediment transport rate models within existing sewer network modeling tools have utilized inappropriate transport rate relationships developed mainly in fluvial environments. A process model that can account for the erosion of fine-grained highly organic in-sewer sediment deposits has been formulated. Values of parameters describing the increase in deposit strength with depth are required. These values are obtained using a genetic algorithm based calibration routine that ensures model simulations of suspended sediment concentrations that correspond to field data collected in a discrete length of sewer in Paris under known hydraulic event conditions. These results demonstrate the applicability of this modeling approach in simulating the magnitude and temporal distribution of suspended in-sewer sediment eroded by time varying flow. Further work is developing techniques to enable the application of this type of model at the network level.
    URI
    http://hdl.handle.net/10454/3152
    Version
    No full-text available in the repository
    Citation
    Tait, S.J., Ahyerne, M., Chebbo, G. and Skipworth, P.J. (2003). Modeling in-sewer erosion to predict sewer flow quality. Journal of Hydraulic Engineering. Vol. 129, No. 4, pp. 316-324.
    Link to publisher’s version
    http://dx.doi.org/10.1061/(ASCE)0733-9429(2003)129:4(316)
    Type
    Article
    Collections
    Engineering and Informatics Publications

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