中文摘要：

使用WOD09,WOA05,WOA01和SODA四种水文数据,利用水力学理论对吕宋海峡的深层水体体积输运进行了估计。结果表明：由于忽略了摩擦和地形等因素的影响,水力学理论得到的输运结果是深层体积输运的上限。不同数据以及吕宋海峡东西两侧选取的不同区域,都对水力学理论的体积输运估计存在显著影响。SODA数据在吕宋海峡附近的深层海区存在偏差,得到体积输运估计明显偏大,因而不适用于水力学理论进行吕宋海峡深层水体体积输运的估计。为对于南海的环流、混合及生态环境存在重要影响的吕宋海峡深层水体体积输运进行合理估计,对利用水力学理论估计深层水体体积输运的研究方法做了进一步探讨。

英文摘要：

Using four databases WOD09, WOA05, WOA01 and SODA, we calculated the deep water volume transport on the basis of the hydraulic theory with the potential density distribution. Ignoring friction and complex bathymetry, the result of hydraulic theory was the upper limit of the actual deep water volume transport. Both dif- ferent databases and different regions on both sides of the Luzon Strait had an evident effect on the estimate of the volume transport using hydraulic theory. Some errors in the deep layer of the SODA database near the Luzon Strait lead to an obvious overestimate of the transport, which implies that SODA database do not apply to the volume transport estimate on the basis of hydraulic theory. We had a proper calculation on the deep water volume transport through the Luzon Strait which had great effects on the circulation, mixing and ecological environment in the South China Sea and had an extended discussion on the method which used the hydraulic theory to calculate the deep wa- ter volume transport.