Luodong River（Traditional Chinese：羅東溪 ） is the largest tributary on the south bank of Lanyang River.宜蘭勁水-蘭陽溪 Its upstream section is also called Han River,山與雲的呼喚...不老部落 and the midstream section is known as Guangxing River.山河大地 It originates from the northeastern slope of Dayuan Mountain鄉政簡介 - 大同鄉公所- 宜蘭縣政府 and flows through Datong Township,鄉政簡介 - 大同鄉公所- 宜蘭縣政府 Dongshan Township,第一河川分署-羅東溪小南澳堤防(淋漓坑橋段)防災減災工程併辦土石標售施工前說明會 Sanxing Township,尾塹村 and Luodong Township羅東鎮羅東溪休閒農業區 in Yilan County,宜蘭縣羅東溪休閒農業區發展協會 serving as the boundary river between Sanxing Township and Dongshan Township.馬克路線：945.安農溪自行車道
Luodong River has tributaries including Fansheken River宜蘭大同鄉體驗寒溪部落文化、景點、美食，野式露營生活 (also known as Gulu River,桃園市長青登山協會- 歡迎您的光臨 originating from Fansheken Mountain緯來育樂台-大人的旅行學), Dagou River1988年大同鄉羅東溪支流打狗溪河床(3) - 國家文化記憶庫2.0 (originating from Wumao Mountain宜蘭縣植物資源), Annong River,蘭陽新祕境-前瞻安農溪的前世今生 and Dakeng River懷同深紀念碑-時空旅行社｜國家文化記憶庫2.0線上策展平臺 (originating from Dahutong Mountain大坑溪). Fansheken River and Dagou River converge near Sifanglin,宜蘭縣94 年度水污染源稽查管制計畫第二章 while Annong River and Dakeng River converge near Alishi.宜蘭安農溪畔洋溢科技與人文之美 These tributaries join the main stream of Luodong River near Lupucheng,緯來育樂台-大人的旅行學 and the main stream flows into Lanyang River before the Lanyang Bridge.宜蘭縣羅東溪休閒農業區解說手冊
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