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Gewählte Master / Diploma Thesis:

Robert Watschinger (2013): SIMULATION DER SORPTION UND VERLAGERUNG VON SCHWERMETALLEINTRÄGEN IM BODEN MITTELS HYDRUS 1D.
Master / Diploma Thesis - Institut für Hydraulik und landeskulturelle Wasserwirtschaft (IHLW), BOKU-Universität für Bodenkultur, pp 83. UB BOKU obvsg FullText

Data Source: ZID Abstracts

Abstract:: In this work, the sorption and displacement behavior of zinc in a soil profile that has been continuously influenced by heavy metals for more than 47 years, was simulated with Hydrus 1D. A soil profile was sampled under a power pole in Flaurling (Tyrol). Since the construction of the pole between 1960 and 1963, the soil has not been altered and only used as grassland. It is assumed that the rain water was enriched with Zinc by the power pole. Soil samples were taken from directly under the pole and analyzed for particle size distribution, hydraulic conductivity, bulk density, pH, organic matter content, mobile zinc content, zinc concentration and compared with reference values. For simulation with Hydrus 1D different layers of the soil were determined by the van Genuchten parameters as water transport parameters through particle size distribution and bulk density. To estimate the sorption of zinc for each soil layer, the sorption coefficient from the Langmuirmodel was used. Climatic data was recorded by a nearby weather station for the studied period. These parameters were used in the simulation as the variable boundary condition (precipitation) and as meteorological parameters for determining evaporation (Pennman-Montheith). The average annual zinc concentration in the rain water entering the soil was estimated to be approximately 5,2 mg/l. The simulation result reflect approximately the measured zinc content in the soil profile in 2010. The zinc was mainly accumulated in the upper humus enriched soil layer and retrained strongly. After 47 years the zinc concentration below 20 cm soil depth remained at a low level. By the used model, the maximum buffer capacity of the soil for Zinc (ca. 673 g/m² between 0 - 60 cm soil depth) would be reached in the year 2300.; Beurteilende(r): Loiskandl Willibald; 1.Mitwirkender: Lair Georg; 2.Mitwirkender: Schwen Andreas