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嘉陵江上游右岸一级支流,史称下邳水,俗称杨店河。红崖河发源于甘肃省天水市麦积区利桥乡,经天水李子坪、两党县太阳乡、左家乡、杨店乡,于石马坪进入陕西省凤县境,在两河口汇入嘉陵江。河道全长78.9 km,流域面积855.1 km2,(两党县境内长28.4 km,面积291 km2)。多年平均流量6.64 m3/s,多年平均径流量2.1亿m3,年输沙量
Jialing River tributaries of the upper reaches of the upper reaches of the river, history, said Xia water, commonly known as Yang Dianhe. Hongya River originated in Liqiao Township, Maiji District, Tianshui City, Gansu Province. It passes through Li Shui-Ping of Tianshui County, Sun Township of Liangde County, Laodian Township and Yangdian Township and enters Fengxian County of Shaanxi Province at Shimamaping. Jialing River. The total length of the river is 78.9 km and the catchment area is 855.1 km2 (28.4 km long and 291 km2 in both parties). The average annual flow of 6.64 m3 / s, the average annual runoff of 210 million m3, annual sediment discharge