3.1 Inorganic nutrient and TSS concentrations
In the Smugawka catchment, the lowest concentrations and fluctuations of N-NH4+ were observed in the grassland (0.02–0.73 mg·dm-3). The highest N-NO3- concentrations were found on arable land, and the P-PO43- level was comparable on agricultural land and forests. The highest TSS levels were found on arable land (Table 1).