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京津唐地区包括:北京市、天津市和河北省的唐山市、秦皇岛市(大部分)及廊坊地区,面积约5.26万平方公里。本地区位于滦河及海河北系的永定河、北运河、潮白河和蓟运河的中下游,包括冀东沿海独流入海诸小河(陡河、沙河、洋河、石河),以及大清河北支和白洋淀以下和子牙河下游的一部分。除了本地的产水和用水之外,滦河、潮白河、永定河和大清河北支等河系的上游的来水和用水,对本地区有直接的关系。
The Beijing-Tianjin-Tangshan region includes Tangshan, Qinhuangdao (most) and Langfang areas in Beijing, Tianjin and Hebei Province, covering an area of about 52,600 square kilometers. The area is located in the middle and lower reaches of the Yongding, North Canal, Chaobai and Jiyun rivers of Luanhe and Haihebei, including the independent small rivers (steep, Shahe, Yanghe and Shihe) along the coast of Jidong and the rivers of Qinghebei Branch and Baiyangdian and part of the Ziya River downstream. In addition to local water production and water use, there is a direct relationship between the water supply and water use in the upper reaches of the Luan River, Chaobai River, Yongding River and the Daqinghebei Branch.