Flytretningen
Flytretningen refers to the direction in which water moves in a river, stream, estuary, or other body of flowing water. It is governed mainly by gravity acting on the bed gradient, but can be influenced by channel shape, obstacles, and tidal forces. In a typical river, the flow is downstream, from higher to lower elevation, with velocity varying by depth and across the cross-section. In tidal environments, the flow direction can reverse during tidal cycles, creating bidirectional currents.
Measurement and representation can be based on observations of floating objects or markers, or more precise
Significance: Knowing the flytretningen is essential for navigation and safety in boating, rafting, and rescue operations.
In fishing contexts, flytretningen can describe the drift of a fly with the current, guiding anglers in