Organically shaped stream
The organically shaped stream (type 11) is a type of flowing water that was defined by the federal / state working group on water . He belongs to the ecoregion independent types .
Water structure
Rivers of this type are mostly curved and hardly cut into pronounced bottom valleys . This often leads to the formation of side channels. The river bed consists more or less entirely of organic material such as peat, dead wood or mud. Bogs that accompany water bodies often appear, which often lead to a brown color due to the humic substances they contain . The water level is only slightly below the level of the surrounding floodplain , the flow velocity is usually low.
Organically shaped streams are similar to organically shaped rivers , but their catchment area is smaller than 100 km².
Flora and fauna
There are black flies , dragonflies and certain species of caddis flies , among others . The existing fish species vary depending on the location of the water, in northern Germany these are mainly sticklebacks , in southern Germany, depending on the nature of the river bed , brown trout , barbel or roach .
The occurrence of aquatic plants depends above all on whether it is a low-base or high-base running water. While there are hardly any aquatic plants in base-rich waters, apart from a few small-scale brook reeds and sedge beds , base-poor waters are populated by various peat mosses , the flooding moor rush or spawning herbs .
Examples
- Parts of the Wümme and Panke
- Upper course of the Recknitz
- Tegeler Fliess
swell
- Profile of the river type 11 on wasserblick.net (PDF; 188 kB)