渤海湾位于渤海西部,北起河北省大清河,南至山东省黄河口,并有海河、蓟运河与潮白河等水系分别由大沽口及北塘口注入湾内。蓟、潮两河虽因设闸后淡水排放量减少,但仍终年有流。而北塘口系属典型潮汐河道,具周期性往复水流。渤海湾水深一般不超过30米,为一半封闭的环陆海湾。 Bohai Bay is located in the western Bohai Sea, north of Hebei Province, Daqing River, south of Shandong Province, the Yellow River estuary, and the Haihe, Jiyunhe and Chaobai River and other water systems from the Taku and Beitang mouth into the Bay. Thistles and tidal rivers although the reduction of freshwater discharge after setting gates, but still year-round flow. Beitangkou is a typical tidal channel, with a periodic reciprocating flow. Bohai Bay water depth generally not more than 30 meters, half closed ring Gulf.