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Simulation der winterlichen Nitratverlagerung in Böden


A simple method for the simulation of transport of non-adsorbed ions during winter like nitrate is described. The physical model assumes that the soil water movement around the moving nitrate peak is always nearly (quasi-)stationary. This means that only the one-dimensional convective—dispersive linear differential equation for the ion movement has to be solved. Field capacity values of the soils and periodically averaged precipitation data are used to determine pore-water velocity. Diffusion and hydrodynamic dispersion data are taken from the literature. For the numerical solution a programmable table (micro-)computer could be used. Numerical dispersion is considered in a simple way. Simulated nitratevs depth distributions compare reasonably well with the measured nitrate profiles.

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Richter, J., Scharpf, H.C. & Wehrmann, J. Simulation der winterlichen Nitratverlagerung in Böden. Plant Soil 49, 381–393 (1978).

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