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Bruce W.MELVILLE 《国际泥沙研究》2002,17(4)
The authors present new measurements of maximum (equilibrium) local scour depth at bridge abutments, the new data being analysed in terms of the multiplying factors given in Melville (1992,1997) and Melville and Coleman (2000). The design method presented in these publications is referred to here as the University of Auckland (UoA) Method. The authors' data apply to the following factors:∏f (flow intensity), ∏θ (abutment alignment) and ∏g (approach channel geometry). 相似文献
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S. Lakshmanan 《Bulletin of Volcanology》1971,35(4):841-847
While mapping parts of the Shahdol district, the author for the first time noticed a dolerite dyke at Tikwa and a basalt sill at Chirha intrusive into the Gondwanas (Supra-Barakars). Though the dolerite dyke shows no noteworthy features in the field, the sill encloses xenoliths of Supra-Barakar sandstone in its basal portion. The present paper gives an account of the mode of occurrence, petrography and age relationship of these intrusions. The presence of abundant xenocrysts of quartz in the basalt sill leads the author to term it a quartz-xenocryst-basalt. The occurrence of Deccan Trap flows in the close proximity of the intrusions suggest that they may be related to the period of Deccan Trap activity. 相似文献
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