WITHDRAWAL FROM THREE-LAYERED STRATIFIED SYSTEMS

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  • 三成層密度場の取水流動に関する研究
  • 3成層密度場の取水流動に関する研究
  • 3 セイソウ ミツドバ ノ シュスイ リュウドウ ニ カンスル ケンキュウ

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Abstract

In pumped storage reservoirs, a well mixed layer is often produced between the upper and lower pycnoclines by discharges from and into the reservoirs. A turbid middle layer may develop when the flood flows into the thermally stratified reservoirs. To understand the flow fields of such systems, the withdrawal from the three layered stratified systems is investigated. A theoretical analysis is performed to estimate the incipient withdrawal and the discharge in each layer. The validity of the analysis is confirmed by laboratory experiments. By using the theory, the optimum height of the outlet for the drainage of the turbid middle layer fluid is evaluated, in practical sense, which may enable the effective operation of the selective withdrawal arrangement to reduce the returdation of turbidity.

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