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| Titel |
Eco-environmentally friendly operational regulation: an effective strategy to diminish the TDG supersaturation of reservoirs |
| VerfasserIn |
J. Feng, R. Li, R. Liang, X. Shen |
| 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 ; 18, no. 3 ; Nr. 18, no. 3 (2014-03-28), S.1213-1223 |
| Datensatznummer |
250120317
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| Publikation (Nr.) |
 copernicus.org/hess-18-1213-2014.pdf |
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| Zusammenfassung |
| The presence of elevated total dissolved gas (TDG) downstream of a spillway
may result in an increased incidence of gas bubble disease in fish.
Supersaturated TDG is transported and dissipated more slowly in reservoirs
than in natural rivers because of a higher water depth and lower turbulence
and thus endangers fish. This paper presents the operational regulations
concerning the mitigation of the TDG supersaturation impact on fish in the
Bala Reservoir on the Zumuzu River. The paper includes the joint operations
of the upstream and downstream power stations. A laterally averaged
two-dimensional model is employed to simulate the TDG transportation and
dissipation in the Bala Reservoir in addition to the hydrodynamics and water
temperature. According to a comparison of the simulation results of different
operational scenarios, this paper suggests a regulation scheme. With respect
to the upstream power station, the adoption of an interval-discharge pattern
instead of a continuous-discharge pattern is recommended to minimize the
negative effect on the reservoir caused by supersaturated TDG. With respect
to the downstream power station, the adoption of a surface tunnel rather than
a bottom tunnel is recommended as a release structure. This paper is a
reference for the eco-environmentally friendly operation of large and deep
reservoirs. |
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