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Zhixian Cao Prot. Dr.-Ing.. Director of Institute of Hydraulic Engineering Tianjin University. Tianjin . China. Wensheng WangSenior Engineer Associate Director of Lower Haihe River Administration Bureau. Ministry of Water Resources. Tianjin 《国际泥沙研究》1997,(3)
I.~ODUCTIONSuspendedsedimenttransportcapacity(SSTC)ofopenchannelflowisoneofthebasicsubjectsinsedimenttransportmechanicsandsedimentationengineeringpractice.Mostexistingformulationsareempiricalandsemiempiricalorrestheavilyonassumptionswhicharenotyetjustified.Thisarisesmostlybecauseofthecomplexityoftheproblem.Forafullydeveloped,in-equilibriumflowinawiderectangularchannel,theSSTCcanbbdeterminedasfollowsor=n:,ty)cab)-dy=Ca'I(l)1I=J4(D)'exp[--V,(n)]'da(2)unwhereCTIsSSTC,uistheaveragedflo… 相似文献
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Dou Guoren
Academician of Chinese Academy of Sciences Honorary Director of Nanjing Hydraulic Research Institute Nanjing 《中国海洋工程》1996,(1)
- Turbulent flow is a basic form of fluid motion widely observed in nature. In hydraulic engineering, especially in the study of sediment movement, turbulence is a key problem. In this paper, based on the stochastic theory of wall turbulence developed by the author and the results by other investigators, fluc-tuation and mean structures and drag coefficient for Newtonian and drag reduction flows in all states (laminar, transitional, turbulent) and in all regions (smooth, transitional, rough) are theoretically discussed in detail. General laws for laminar and turbulent flows obtained by the author are verified by the experimental results obtained by others, and there is good agreement between them. 相似文献
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On 4 August 1995, the UN Conference on Straddling Fish Stocks and Highly Migratory Fish Stocks adopted an Agreement for the conservation and management of straddling and highly migratory fish stocks. The mandate given by the General Assembly required that the results of the Conference be fully consistent with the UN Law of the Sea Convention. The purpose of this article is to examine the significance of the agreement for the law of the sea as embodied in the Convention. It shows that the agreement constitutes an important contribution to the Convention in that it facilitates the implementation of the Convention's provisions, strengthens the Convention's regime, and further develops general or framework rules of the Convention. The most significant contribution lies in the development of the law with respect to such issues as the precautionary approach to fisheries, compatibility of conservation and management measures adopted for areas under national jurisdiction and those for the adjacent high seas areas, the role of regional organizations or arrangements, duties of the flag State, enforcement against foreign vessels on the high seas, and port State jurisdiction. 相似文献
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