The chemism of precipitation and free water in the immission region Jelsava-Lubenik (Slovakia)
1995
Tuzinsky, L. (Lesnicky Vyskumny Ustav, Zvolen (Slovakia)) | Tothova, S.
The work deals with problems of immission load, especially with the analysis of the present status of harmful substances in precipitation and free soil water and their transport by surface runoff. Regarding water reaction, the highest mean annual values of pH range from 8.1 to 10.8, whereas the lowest values are around 4.4 (very acid reaction). The wide range of pH values is created mostly by the different relief elements (altitude, exposure, distance from the source, and others). Mg has the greatest share in immissions, its concentrations ranging on the most attacked plots up to and beyond 70 mg l** (-1). Wet depositions represent 70-160 kg of Mg per ha, on least exposed plots around 20 kg per ha per year. Very high concentrations of Mg, on average around 120 mg l** (-1), are present in surface runoff. This represents a 10 to 20-fold increase compared to the plots with the smallest load. Sulphates represent the second most significant part of total deposition (1.53-38.4 mg l** (-1)). Mean values of nitrates do not exceed 5 mg l** (-1). Annual concentrations of phosphates (0.2-0.7mg l** (-1)) are far below the annual sufficiency limit. The content of microelements (Mn, Fe, Zn) does not exceed 1 kg per ha per year.
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