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| The Mid-Yangtze Flood After the Commencement of the Three Gorges Project and the Countermeasures (II) |
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Abstract: To relieve the serious threat of flood in mid-Yangtze after the commencement of the Three Gorges Project (TGP) as predicted in the first part of this paper, some representative measures of mitigation so far proposed are simulated and analyzed with the same model for mid-Yangtze river-net. Such measures as to cutoff the Paizhou bend (CPB), to raise the stage of flood diversion at Chenglingji (RSD) and to divert flood in south and north sides of Jingjiang reach (DNS) are all shown to be effective but not enough for the safety of the mid-Yangtze if being applied separately with conditions provided by TGP and the designed Flood Diversion Areas (FDA) approved by the central government. Based on a great number of computations for many scheme combinations, a comprehensive scheme that combines CPB and DNS with RSD as auxiliary operation measures is proposed, which is shown to be capable of protecting the mid-Yangtze against the flood of 1954 and having enough rooms to cope with certain uncertainties of river deformation that might be brought about by the trapping of sediments and flow regulations of the TGP and others.
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Received: 03 August 2010
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2010, Vol. 28 
