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长江口在枯水期,外海盐水入侵严重,其入侵的渠道主要来自北支及南、北港三个入侵源。这种入侵特性,导致长江口沿岸经常被高氯度水体包围,严重影响长江口附近地区工农业生产发展和生活用水需要。本文从分析长江口潮汐和氯度的实测资料出发,特别是对1979年、1987年,1988年、1989年枯水期长江口全潮水文测验资料进行了较系统细致的分析,从错综复杂的长江口氯度分布中寻找出一定规律,为长江口的淡水资源开发利用打下基础。
During the dry season of the Yangtze River estuary, the salt water invaded by the outer sea was serious, and the main sources of its invasion came from the north and three sources of invasion of North and South ports. This intrusion characteristic led to the frequent encroachment of the high-chloride water along the Changjiang Estuary, which seriously affected the industrial and agricultural production and water use in the vicinity of the Changjiang Estuary. Based on the analysis of the measured data of tidal and chlorinity in the Changjiang Estuary, this paper analyzes the hydrological data of the whole tide in the Changjiang Estuary in 1979, 1987, 1988 and 1989 in dry season. From the intricacies of chlorine Degree distribution to find out a certain law, and lay a foundation for the development and utilization of freshwater resources in the Yangtze River estuary.