Swan River (Flathead Lake)
| Swan River | ||
 Swan River National Wildlife Refuge |
||
| Data | ||
| Water code | US : 791789 | |
| location | Montana ( USA ) | |
| River system | Columbia River | |
| Drain over | Flathead River → Clark Fork → Pend Oreille River → Columbia River → Pacific Ocean | |
| Headwaters | Mission Range, Rocky Mountains 47 ° 17 ′ 48 ″ N , 113 ° 52 ′ 4 ″ W. |
|
| Source height | approx. 2350 m | |
| muzzle |
Flathead Lake Coordinates: 48 ° 3 '35 " N , 114 ° 4' 50" W 48 ° 3 '35 " N , 114 ° 4' 50" W. |
|
| Mouth height | 881 m | |
| Height difference | approx. 1469 m | |
| Bottom slope | approx. 11 ‰ | |
| length | approx. 130 km | |
| Catchment area | 1904 km² | |
| Discharge A Eo : 1740 km² Location: 24 km above the mouth |
MQ 1923/2017 Mq 1923/2017 |
32.8 m³ / s 18.9 l / (s km²) |
| Flowing lakes | Lindbergh Lake , Swan Lake | |
| Communities | Bigfork | |
The Swan River is an approximately 130 km long tributary of Flathead Lake in the US state of Montana .
River course
The Swan River rises at an altitude of about 2,350 m on the eastern flank of the Mission Range , a mountain range of the Rocky Mountains that rises east of the Flathead Depression. The Swan River initially flows a short distance to the east. It flows through the 2025 m high Gray Wolf Lake and Lindbergh Lake . The Swan River then turns north. After about 90 km he reaches the south west bank of the 15 km long Swan Lake . Above the lake, the river passes the Swan River National Wildlife Refuge . For the last 15 km, the Swan River turns west. There is a weir 2.7 km above the mouth. Part of the river water is channeled to a hydroelectric power station (4 MW installed capacity), which is 800 m above the river mouth and uses a height difference of 30 m to generate electricity. The Swan River finally flows into the lake at Bigfork on the northeast shore of Flathead Lake.
Hydrology
The Swan River drains an area of 1904 km². The mean discharge below Swan Lake, 15 miles above the estuary, is 32.8 m³ / s. The highest monthly discharges usually occur with an average of 93 m³ / s during the snowmelt in June.
Web links
Swan River in the United States Geological Survey's Geographic Names Information System