Application example: Monitoring DOC discharge from forest soils

The Sosa Dam reservoir catchment

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Dissolved organic carbon (DOC) discharge from soils into the tributaries of the drinking water reservoirs poses considerable challenges for the Saxon water supply. However, it is not yet clear which mechanisms and sources lead to increased DOC concentrations. The aim of the research project  was to produce a detailed and comprehensive study into DOC discharge in the Sosa Dam catchment.

(Source: SMUL Saxon)

Leachate was extracted from the humus layer and the mineral soil with glass suction plates and cups respectively, to examine their DOC concentrations. Accompanying measurements of soil temperature and soil-water tension were taken using Tensiomarks, and the soil-water content with SMT100 sensors. The measurements were carried out in several soil horizons, with special attention on the organic layer.

During a joint field day, ecoTech installed the instruments at one of the four locations in cooperation with employees of the SMEKUL (Saxon State Ministry for Energy, Climate Protection, Environment and Agriculture) and the TU Dresden.

Link to project

Product Parameter
Tensiomark Soil water tension, Soil temperature
SMT100 sensors Volumetric water content
Glass suction plate Leachate extraction
Glass suction cups Dissolved organic substances
EXO 3 Multiparameter probe Temperatur, conductivity, turbitiy, dissolved carbon
EXO fDOM Smart sensor Dissolved carbon
enviLog Midi data logger with automatic remote data transmission

Sächsisches Ministerium für Energie, Klimaschutz, Umwelt und Landwirtschaft (SMEKUL)
Referat 42: Boden, Altlasten


Hr. Dr. Ingo Müller

Project partner

Technische Universität Dresden
Institut für Bodenkunde und Standortslehre
Pienner Straße 19
01737 Tharandt


Prof. Dr. Karsten Kalbitz
M.Sc. Stephan Krüger