Die Bodenkultur - Journal for Land Management, Food and Environment

N. Osadcha, V. Osadchyy, V. Lutkovsky, Y. Luzovitska and V. Artemenko:

Experimental Research and Mathematical Modeling of Nutrients Release in a Small Watershed


Quantification of nutrients emissions into rivers is important for many scientific and practical purposes. The field
experiment was carried out at the small plot scale during a snowmelt period to understand the characteristic of nutrients export from the watershed. It is observed that emission of nitrogen is 10 times higher compared to phosphorous.
Both nitrogen and phosphorus release is closely related to the hydrological parameters. While nitrogen is almost
evenly distributed between direct flow and interflow, phosphorus comes mainly with the last. The algorithm for
simulation of N and P release during snowmelt conditions was presented. The simulation accuracy was assessed based on Nash-Sutcliffe coefficient, which resulted in 0.7 and 0.86 for N and P, respectively. The presented method can be used for basins with insufficient or complete absence on N and P concentrations.

Key words: Nitrogen, phosphorus, plot scale, simulation.