| Mass movements of soils and bedrock erosion in the headwater parts of stream watersheds represent the initial stages of material transport that is made possible by physical weathering. |
| Most of the potential sites for large dams already have been utilized, and smaller dams in the headwater regions are now being constructed. |
| They reside in their headwater streams for approximately three years, before making their first migration to the Beaufort Sea to feed in summer. |
| Madre de Dios River, Spanish Río Madre De Dios, headwater tributary of the Amazon in southeastern Peru and northwestern Bolivia. |
| Some populations like Early Stuart sockeye cover 1,100 kilometres to their headwater spawning areas. |
| The Redside Dace is a coolwater species found in pools and slow flowing areas of small headwater streams with a moderate to high gradient. |
