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本文详细分析了1958年以来的演变过程.说明1958～1978年间,北支河槽特性从受落潮流影响转为受涨潮流控制,使北支在河流动力、地貌、水文、沉积等方面起了一系列的变化,因此对其本身及南支产生了影响. 自1979年以来,南、北支会潮点进入北支河段内,北支上口段产生了一股较强的涨潮落潮流,对北支的淤积形态、河流地貌、水文等方面都起了新的变化,使北支河槽更加动荡不定.而北支的存在对南支仍产生不利影响. 文章并对今后发展趋势作了估计. 最后指出,为了切断南北支相互之间的干扰,有利于北支的综合利用和南支的整治,建议在北支上口建闸活堵,并将此工作纳入长江口综合治理规划中,进行通盘考虑.
This paper analyzes in detail the evolution process since 1958. The results show that from 1958 to 1978, the characteristics of Beiqizi channel changed from falling trend to controlled trend of rising tide so that Beihai played a role in the aspects of river power, physiognomy, hydrology and sediment Series of changes, thus affecting itself and the South Branch since 1979, the tidal flanks of the North and South Branch into the North Branch of the North Branch, the North Branch of the mouth has produced a strong ebb and flow, North Branch of siltation morphology, river landscape, hydrology and other aspects have taken a new change, so that the North Branch of the river more turmoil, while the existence of the North Branch of the South Branch still adversely affected the article and future trends were estimated In the end, it is pointed out that in order to cut off the interference between north and south branches, it is in favor of the comprehensive utilization of North Branch and the remediation of South Branch, and it is suggested to build a gate block in the branch of North Branch and incorporate this work into the comprehensive management plan of the Yangtze Estuary, For all considerations.