Forest-dominated catchment area in the Hochsolling region

The sub-area Sievershausen covers about 90 km2 and lies in the catchment area of the river Obere Ilme. In the northeast, the boundary of the sub-area corresponds to the borderline of the sampling area and the Nature Park.

Study areas of the Forest Ecosystem Research Centre (FZW) at the University of Göttingen and of the Northwest German Forest Research Institute (NW-FVA) are also located within the catchment area.

The sub-area is mainly used for forestry and agriculture and for gentle tourism.

Sampling site

Sievershausen-Fichte Forest in the catchment area of the river Obere Ilme
Sievershausen-Buche Forest in the catchment area of the river Obere Ilme
Sievershausen-Regenwurm Grazing land in the catchment area of the river Obere Ilme
Friedrichshäuser Bruch The sampling site Friedrichshäuser Bruch is located in the forest district Sievershausen at an altitude of about 500 m.


Common spruce A major primary producer in semi-natural and anthropogenic affected ecosystems.
Beech As the most dominant deciduous tree species in Central Europe, it plays a significant role in most nearly natural and also anthropogenically influenced forest ecosystems up to an altitude of 1100 m.
Earthworm (Lumbricus terrestris) As an organism living at ground level, it is a major driver of the decomposition of organic material (e.g. plant litter).
Soil Soil is livelihood and biosphere for humans, animals, plants and soil organisms. All the substances brought in are transported, transformed and/or accumulated in the soil.


Metals Eighty percent of all elements on earth are metals
Nonmetals Only eighteen elements in the periodic table
Chlorohydrocarbons Group of organic compounds with at least one covalently bonded chlorine atom
DDT and metabolites Toxic and persistent organochloropesticide
Hexachlorocyclohexane Several isomeric compounds among the group of chlorinated hydrocarbons
Polycyclic Aromatic Hydrocarbons Group of organic compounds with at least three condensed six-membered rings
Stable Isotopes Atoms of one element with different weights
Flame Retardants Flame retardants reduce the flammability of objects
Perchlorate Salts of perchloric acid
Supplementary parameters Additional information for the interpretation of contamination data

Sampling period

1999 - 2019