Riffle-pool sequence

The word refers to intoxication in the hydrology of waters a gently sloping stretch of water with a higher flow rate and water turbulence than in the surrounding water course. As opposed to scour have noise when changing water guides relatively consistently high turbulence with increasing drain. In a natural water bodies to noise and scours change from regular way.

In the renaturation artificial Feldstein noise are in many cases used to (eg weirs ) reduce stepped Sohlabstürze that impede fish migration, and to improve structuring and settlement of the water bottom. Free sand, gritty noise are important spawning grounds for brown trout, for example, since an adequate oxygen supply to the spawn is guaranteed. ]. Noise are therefore sometimes referred to as spawning benches.