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Hai-Fluss/Hai-He
海河,是中国华北地区的最大水系,中国七大河流之一。海河水系古时统称“九河”,宋朝时,海河干流为界河下游段,金、元时改称直沽河、大沽河。海河这个名字始见于明末。直到清代,直沽河等名称才逐渐被海河这个名字所取代。海河水系由海河干流和上游的北运河(含北运河、潮白河与蓟运河)、永定河、大清河、子牙河、南运河五大支流组成。以卫河为源,发源于山西省晋城市陵川县,全长1,050公里;以漳河为源,发源于山西省长治市,全长1031公里。
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