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历史上,海河上游来水充沛,海水涨潮时仅顶托河水水位升高,对中、上游河水咸化影响甚小。五十年代开始,由于上游兴修水利以及沿途用水量增加,使海河泄流减少,海水乘潮上溯,咸化了河水。天津市人民政府为保护海河水质,遂决定于1959年建设了河口挡潮闸(俗称海河大闸),实现了“咸谈水分家。”但建闸不久,即发生了闸门大量漏水,加上两个
Historically, there was plenty of water in the upper reaches of the Haihe River. Only when the sea water was tidal rising, the water level of the top watercourse was raised, and the water salinity of the upper and middle reaches was little affected. Beginning in the 1950s, due to the increase of water resources in the upper reaches and the increase of water consumption along the way, the discharge of the Haihe River was reduced, and the sea water was traced upstream and the river was salified. In order to protect the water quality of the Haihe River, Tianjin Municipal People’s Government decided to build the estuary tidal flats gate (commonly known as the Haihe River floodgate) in 1959 to realize “salty talk about water diversions.” However, shortly after the sluice, a large flood of water gates occurred, Two