Lanyang River
{{Infobox river
| name = Lanyang River
| native_name = {{native name|zh-Hant|蘭陽溪}}
| name_other =
| etymology =
| image = Taiwan LanYang River 2.JPG
| image_size =
| image_caption =
| image_alt =
| pushpin_map = Taiwan
| pushpin_map_alt = Map showing the mouth of Lanyang River
| pushpin_map_caption = Lanyang River in Taiwan
| mapframe = yes
| mapframe-zoom = 8
| river_system =
| progression =
| source1_location = Nanhu Mountain
| source1_coordinates=
| source1_elevation = {{convert|3536|m|abbr=on}}
| mouth_location = Pacific Ocean: Yilan
| mouth_coordinates = {{coord|24.715|N|121.834|E|display=inline,title}}
| mouth_elevation =
| altitude_difference=
| basin_size = {{convert|978|km2|abbr=on}}
| subdivision_type1 = Country
| subdivision_name1 = Taiwan
| basin_cities =
| basin_landmarks =
| basin_population =
| length = {{convert|73|km|abbr=on}}
| width_min =
| width_avg =
| width_max =
| depth_min =
| depth_avg =
| depth_max =
| discharge1_location=
| discharge1_min = 2.85 m3/s
| discharge1_avg =
| discharge1_max = 5,420 m3/s
| tributaries_left = Yilan River
| tributaries_right = Dongshan River
| waterbodies =
| waterfalls =
| bridges =
| ports =
| custom_label =
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}}
The Lanyang River ({{zh|t=蘭陽溪|p=Lányáng Xī}}) is a river in northeast Taiwan.{{cite book |title=The Republic of China Yearbook 2015 |chapter=Geography & demographics |date=2015 |publisher=Executive Yuan |isbn=978-986-04-6013-1 |pages=40–53 |url=http://yearbook.multimedia.ey.gov.tw/enebook/2015yearbook/index.html |access-date=2016-05-01 |archive-url=https://web.archive.org/web/20160531095543/http://yearbook.multimedia.ey.gov.tw/enebook/2015yearbook/index.html |archive-date=2016-05-31 |url-status=dead }}{{cite web |url=http://enwww.e-land.gov.tw/cp.aspx?n=471BF3A523D05BB2&s=235733001BBDD8D2 |date=11 May 2016 |publisher=Yilan County Government |title=Geographic Environment: The Main River of Lanyang Plain |accessdate=19 June 2016}}
Geology
The river flows through Yilan County for 73 kilometers. It has a drainage basin area of 978 km2 with maximum peak flow of 5,420 m3/s.{{Cite web|url=https://eng.wra.gov.tw/7618/7664/7718/7719/7722/12925/|title=Lanyang River}}