关于在黄浦江河口建闸的必要性,笔者和有关方面已有论述。然而其可行性如何,可能是又一个现实的议题。本文拟从政府和社会的经济能力、河口水闸对河势及河床稳定的影响以及与航运交通的关系、工程建设的技术能力等方面作一些分析,说明河口建闸是可行的。在论述河口建闸的必要性时,曾对防洪标准问题作了一些分析。一个城市的防洪标准取决于该城市的政治、经济地位,政治、经济地位越重要,洪灾造成的损失和影响愈大,它的防汛标准理应越高,这是人们的共识。然而实际上由于种种原因,例如人们对灾害的认识不足,或由于社会经济条件的限制,或由 On the Huangpu River estuary to establish the necessity of the gate, the author and the parties concerned have been discussed. However, its feasibility may be another realistic issue. This article intends to make some analyzes from the economic power of the government and society, the influence of the sluice on the river regime and riverbed stability, the relationship with the shipping traffic and the technical capability of the project construction, which shows that it is feasible to build the sluice at the estuary. When discussing the necessity of establishing gates at estuaries, some analyzes have been made on flood control standards. Flood control standards in a city depend on the city’s political and economic status, political and economic status is more important, the greater the damage and impact caused by floods, flood control standards should be higher, it is the consensus. However, in fact, due to various reasons, such as people’s lack of awareness of disasters, or due to social and economic conditions, or by