Rush (hydrogeology)
In the hydrology of water bodies, the word noise refers to a gently sloping stretch of water with a higher flow velocity and water turbulence than in the surrounding water course. In contrast to the scour , noises have a relatively constant high turbulence with changing water flows with increasing discharge . In a natural body of water, noise and scour alternate regularly.
In renaturation , artificial field stone noise is used in many cases in order to remove step-shaped bedfalls (for example weirs ) that hinder fish migration and to improve the structuring and settlement of the river bed. Sand-free, gravelly rushes are important spawning grounds for brown trout , for example , as they ensure an adequate supply of oxygen to the spawn . Noise is therefore sometimes referred to as spawning banks .
See also
literature
- Bent Lauge Madsen, Ludwig Tent: Lively brooks and rivers. Books on Demand, 2000, ISBN 3898115461 . P. 109ff