Vega (soil type)

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A Vega ( Spanish : fertile plain ) is a type of soil that has arisen from sedimented brown raw material in the regularly flooded floodplain area of rivers .

Vega were proclaimed soil of the year 2011 under the term brown floodplain soil .

In the international soil classification World Reference Base for Soil Resources (WRB), most of the vegetation belong to the Phaeozemes and Umbrisoles , some also to the Cambisoles . If stratified fluvial deposits can still be seen at shallow depths, they can also be fluvisols .

The brown floodplain (Vegen)

Allochthonous Vegen

Allochthonous Vegen is the soils created by the removal of brown material from the surrounding fields and its redeposition. They can be found in areas that are frequently exposed to flooding. The topsoil undergoes terrestrial development, while the subsoil is influenced by the sometimes high groundwater level (approx. 1 m below the surface of the terrain). Soil horizon sequence : Ah / M

Autochthonous Vegen

Autochthonous Vega of the middle Upper Rhine Plain near Rastatt

Alluvial soils are autochthonous if they are created by their own soil development. This means that these floodplain soils arise where there is no longer any sedimentation, for example in diked areas. They are characterized by deep weathering. The release of iron oxides causes the soil to turn brown. Horizon sequence: Ah / Bv / Go (Scheffer 2002: 509f.)

Properties and use

Allochthonous and autochthonous floodplain soils can be summarized in their usage characteristics. They are loose, easily rootable, biologically active and quite fertile, which also results in the high soil numbers in this area of ​​the floodplain. As natural vegetation, a predominantly from the frequently flooded area with very high groundwater level would pastures existing softwood and flooded the area rare one primarily of English oaks , elms and ash trees existing Hartholzaue set. These very fertile soils are mainly used as grassland today , but also as arable land. The advantages of the high profitability are so great that the risk of the regular flooding is accepted.


Web links

Individual evidence

  1. Brauner Auenboden - 2011