一水文要素的分布及其变化我們比較詳細地研究了本海区的水文情况及溫、盐度的垂直分布与时間变化和溫、盐度的跃层現象。对本海区終年的水文特征,得到了这样的概念:基本上是受季节性注入渤海的沿岸低盐水与經山东高角——长山串之間流入本海区的外海高盐水这两个水体所控制。在某些浅水区域,冬季的結冰与冬、春之間的溶冰作用,夏秋之間,大量黄泛水的流入渤海,均能使渤海的水文性貭产生一定的变化。整个海区的水文系 Distribution and Change of a Hydrological Element We studied in more detail the hydrological conditions and the vertical distribution and variation of temperature and salinity, and the thermocline and salinity transitions in this area. For the hydrological characteristics throughout the year in the area, the concept is basically obtained that these two bodies of water are mainly controlled by the low salinity of the coastal water injected into the Bohai Sea seasonally and by the high seawater brine flowing into the sea area between Shandong Changjian - Changshan Trail. In some shallow water areas, winter icing and ice-melting between winter and spring, and the flow of a large amount of yellow-pan-water into the Bohai Sea between summer and autumn, can make some changes in the hydrology of the Bohai Sea. Hydrology throughout the sea