What is Arun River?
{{Infobox river | name = Arun | native_name ={{native name|zh-Latn|Bum-chu}} | name_other = | name_etymology = <!---------------------- IMAGE & MAP --> | image = Arun River of Nepal.JPG | image_size = 250px | image_caption = View of Arun River from [[Leguwa]] VDC of [[Nepal]]. | map = | map_size = | map_caption = | pushpin_map = Nepal | pushpin_map_size = | pushpin_map_caption= Location of mouth in Nepal <!---------------------- LOCATION --> | subdivision_type1 = Country | subdivision_name1 = [[Nepal]], [[China]] | subdivision_type2 = State | subdivision_name2 = [[Tibet]] | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = | subdivision_name5 = <!---------------------- PHYSICAL CHARACTERISTICS --> | length = | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= [[Kosi river]] | discharge1_min = | discharge1_avg = | discharge1_max = <!---------------------- BASIN FEATURES --> | source1 = Gutso | source1_location = [[Tibet]] | source1_coordinates= | source1_elevation = | mouth = Confluence with [[Sun Kosi]] and [[Tamur River]] to form [[Koshi River|Sapta Kosi]] | mouth_location = [[Triveni, Nepal|Tribenighat]], [[Nepal]] | mouth_coordinates = {{coord|26|54|47|N|87|09|25|E|display=inline,title}} | mouth_elevation = | progression = | river_system = | basin_size = | tributaries_left = Yeru Tsanpo, Trakar-chu | tributaries_right = [[Barun River]] | custom_label = | custom_data = | extra = }} The '''Arun River''' ({{lang-ne|अरुण नदी}}) is a river that flows from [[Tibet]] to [[Nepal]]. It is a part of [[Koshi River]] which flows into [[India]]. It is known as '''Phung Chu''' or '''Bum-chu''' at Tibet, from where