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| Titel |
Uncertainty in computations of the spread of warm water in a river – lessons from Environmental Impact Assessment case study |
| VerfasserIn |
M. B. Kalinowska, P. M. Rowiński |
| 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 ; 16, no. 11 ; Nr. 16, no. 11 (2012-11-12), S.4177-4190 |
| Datensatznummer |
250013566
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| Publikation (Nr.) |
 copernicus.org/hess-16-4177-2012.pdf |
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| Zusammenfassung |
| The present study aims at the evaluation of sources of uncertainty in modelling
of heat transport in a river caused by the discharge coming from a cooling
system of a designed gas-stem power plant. This study was a part of
an Environmental Impact Assessment and was based on two-dimensional modelling of
temperature distribution in an actual river. The problems with the proper
description of the computational domain, velocity field and hydraulic
characteristics were considered in the work. An in-depth discussion on the
methods of evaluation of the dispersion coefficients in the model comprising of all
four components of the dispersion tensor was carried out. It was shown that
in natural rivers all components of a dispersion tensor should be taken into
account to qualitatively reflect the proper shape of temperature
distributions. The results considerably depend on the 2-D velocity field as
well as hydraulic and morphometric characteristics of the flow. Numerical
methods and their influence on the final results of computations were also
discussed. All computations were based upon a real case study performed in
Vistula River in Poland. |
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