Search room for soil-permanent observation areas on forested sites (WMS Service)

It has long been known that soils change more or less quickly. Some of these changes have natural causes. Others, on the other hand, are due to soil pollution caused by humans directly or indirectly. These include, for example, the substance entries about precipitation and dust (acids, nutrients, heavy metals, radionuclides, organic pollutants, etc.). But also the farmer or forestry farmer has changed the soil ever since through cultivation and use. The vast majority of these processes are very slow and difficult to perceive by the human senses. In order to document possible changes, the LBEG implements the Lower Saxony soil-permanent observation program. For this purpose, a network of 90 so-called Soil Permanent Observation Areas (BDF) has been established in cooperation with other landing services. Seventy are used for local farming (BDF-L) and twenty in forest-used (BDF-F) sites. The selection of representative soil permanent observation areas (BDF) was based on geoscientific criteria such as soil and rock conditions, climate and morphology. In addition, the LBEG took into account typical land uses (agriculture and forestry, nature conservation areas) and stress factors (immissions, utilisation-related loads, etc.). The aim is to detect possible soil changes based on these representatively selected measuring surfaces, to evaluate and predict the cause and effects. If this succeeds, the actors in politics, administration and land use are provided with a secure data base for their decision-making processes in good time. The BDF-F program consists of a combination of feature and process documentation. The feature documentation includes the periodic determination of stocks and conditions such as physical, chemical and biological soil studies, surveys of biomass and their ingredients, assessments of forest status through crown response and needle/leaf analyses, as well as images of soil vegetation. Process documentation is done by measuring rivers in and across the boundaries of the ecosystem. In forest ecosystems, deposition, release by weathering, absorption into biomass and leachate discharge are important rivers for many elements. In addition, the scattering case and physicochemical milieu variables (immission, meteorology) are also measured to assess stressful situations for forest ecosystems (Text: Northwest German Forestry Laboratory). In other federal states there are similar programmes, the content of which is coordinated among the implementing institutions. A framework directive is under preparation within Europe.