河名「伊遜」為蒙古語，意為「九」[1]:90。發源於圍場滿族蒙古族自治縣哈里哈鄉西北老嶺山東麓翠花宮，蜿蜒向南流經圍場縣中南部、隆化縣中部、灤平縣東部等地區，最後於承德市雙灤區灤河鎮匯入灤河。河長214千米，流域面積6689.3平方千米，年均徑流量4686萬立方米。上游幹流建有大型的廟宮水庫。[2]
參考資料
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