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| Titel |
Extension of the QUASAR river water quality model to incorporate dead-zone mixing |
| VerfasserIn |
M. J. Lees, L. Camacho, P. Whitehead |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 2, no. 2/3 ; Nr. 2, no. 2/3, S.353-365 |
| Datensatznummer |
250000360
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| Publikation (Nr.) |
 copernicus.org/hess-2-353-1998.pdf |
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| Zusammenfassung |
| A modification to the well-known water
quality model "Quality Simulation Along River Systems" (QUASAR) is presented, extending
its utility to real-time forecasting applications such as the management and control of
pollution incidents. Two aggregated dead-zone (ADZ) parameters, namely time delay and
dispersive fraction, are incorporated into the existing model formulation, extending the
current continuously stirred tank reactor based model processes to account for advective
and active mixing volume dispersive processes. The resulting river water quality model
combines the strengths of the QUASAR model, which has proven non-conservative pollutant
modelling capabilities, with the accurate advection and dispersion characterisation of the
ADZ model. A discrete-time mathematical representation of the governing equations is
developed that enables efficient system identification methods of parameter estimation to
be utilised. The enhanced water quality model and associated methods of parameter
estimation are validated using data from tracer experiments conducted on the River Mimram.
The revised model produces accurate predictions of observed concentration-time curves for
conservative substances. |
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