Date
2020-04-29Subject
550 Earth sciences and geology HydrodynamikModellierungDreidimensionales ModellStauseeMorphologie <Biologie>Schichtung <Hydrologie>MischenMetadata
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Aufsatz
Effects of morphology in controlling propagation of density currents in a reservoir using uncalibrated three-dimensional hydrodynamic modeling
(Effects of morphology in propagation of density currents)
Abstract
In this study, effects of basin morphology are shown to affect density current hydrodynamics of a large reservoir using a three-dimensional (3D) hydrodynamic model that is validated (but not calibrated) with in situ observational data. The AEM3D hydrodynamic model was applied for 5-month simulations during winter and spring flooding for the Maroon reservoir in southwest Iran, where available observations indicated that large-scale density currents had previously occurred. The model results were validated with near-bottom water temperature measurements that were previously collected at five locations in the reservoir. The Maroon reservoir consists of upper and lower basins that are connected by a deep and narrow canyon. Analyses of simulations show that the canyon strongly affects density current propagation and the resulting differing limnological characteristics of the two basins. The evolution of the Wedderburn Number, Lake Number, and Schmidt stability number are shown to be different in the two basins, and the difference is attributable to the morphological separation by the canyon. Investigation of the background potential energy (BPE) changes along the length of the canyon indicated that a density front passes through the upper section of the canyon but is smoothed into simple filling of the lower basin. The separable dynamics of the basins has implications for the complexity of models needed for representing both water quality and sedimentation.
Citation
In: Journal of Limnology Volume 79 / No. 3 (2020-04-29) , S. 238-253 ; EISSN 1723-8633Sponsorship
Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-202012232905,
author={Zamani, Behnam and Koch, Manfred and Hodges, Ben R.},
title={Effects of morphology in controlling propagation of density currents in a reservoir using uncalibrated three-dimensional hydrodynamic modeling},
journal={Journal of Limnology},
year={2020}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2020$n2020 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/12363 3000 Zamani, Behnam 3010 Koch, Manfred 3010 Hodges, Ben R. 4000 Effects of morphology in controlling propagation of density currents in a reservoir using uncalibrated three-dimensional hydrodynamic modeling :Effects of morphology in propagation of density currents / Zamani, Behnam 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/12363=x R 4204 \$dAufsatz 4170 5550 {{Hydrodynamik}} 5550 {{Modellierung}} 5550 {{Dreidimensionales Modell}} 5550 {{Stausee}} 5550 {{Morphologie <Biologie>}} 5550 {{Schichtung <Hydrologie>}} 5550 {{Mischen}} 7136 ##0##http://hdl.handle.net/123456789/12363
2020-12-23T06:12:16Z 2020-12-23T06:12:16Z 2020-04-29 doi:10.17170/kobra-202012232905 http://hdl.handle.net/123456789/12363 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung-Nicht-kommerziell 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ hydrodynamic modeling AEM3D three-dimensional model reservoir morphology background potential energy stratification mixing 550 Effects of morphology in controlling propagation of density currents in a reservoir using uncalibrated three-dimensional hydrodynamic modeling Aufsatz In this study, effects of basin morphology are shown to affect density current hydrodynamics of a large reservoir using a three-dimensional (3D) hydrodynamic model that is validated (but not calibrated) with in situ observational data. The AEM3D hydrodynamic model was applied for 5-month simulations during winter and spring flooding for the Maroon reservoir in southwest Iran, where available observations indicated that large-scale density currents had previously occurred. The model results were validated with near-bottom water temperature measurements that were previously collected at five locations in the reservoir. The Maroon reservoir consists of upper and lower basins that are connected by a deep and narrow canyon. Analyses of simulations show that the canyon strongly affects density current propagation and the resulting differing limnological characteristics of the two basins. The evolution of the Wedderburn Number, Lake Number, and Schmidt stability number are shown to be different in the two basins, and the difference is attributable to the morphological separation by the canyon. Investigation of the background potential energy (BPE) changes along the length of the canyon indicated that a density front passes through the upper section of the canyon but is smoothed into simple filling of the lower basin. The separable dynamics of the basins has implications for the complexity of models needed for representing both water quality and sedimentation. open access Effects of morphology in propagation of density currents Zamani, Behnam Koch, Manfred Hodges, Ben R. doi:10.4081/jlimnol.2020.1942 Hydrodynamik Modellierung Dreidimensionales Modell Stausee Morphologie <Biologie> Schichtung <Hydrologie> Mischen publishedVersion EISSN 1723-8633 No. 3 Journal of Limnology 238-253 Volume 79 false
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