Ziya River

…Hai at Tianjin; and the Ziya River, flowing northeastward from southwestern Hebei toward Tianjin, along with its important tributary, the Hutuo River, rising in the Taihang Mountains west of Shijiazhuang in western Hebei. The most important of the Hai’s tributaries is the Yongding. Issuing from the Guanting Reservoir—which is itself…