TY - JOUR N2 - The intensive agricultural use of the land affects both quantity and quality of river water in the catchment area. Such impact is visible also in the Szreniawa River catchment in the Małopolskie Voivodeship. The combination of intensive plowing and soil susceptibility to water erosion are the main causes of soil and nutrients depletion during the heavy rainfall. The aim of the study is to determine changes in the water quality in the Szreniawa River catchment compared to the agri-culture use and precipitation level. The quality of surface water has been analysed in the river catchment area in three sampling points. The concentration of the total suspended soils in the samples collected after heavy rainfall in August 2017 reached a value of 837 mg·dm–3. The average concentrations of N-NO3 in the years of 2016–2019 ranged from 0.16 to 13.46 mg·dm–3, with the highest val-ues in the summer (up to 13.46 mg·dm–3). The concentration of N-NH4 and P-PO4 in the Szreniawa water was affected by precipitation. The highest value of average concentration of N-NH4 3.00 mg·dm–3 was recorded in the autumn of 2019 in the middle section of the river. The highest value of P-PO4 0.90 mg·dm–3 was recorded in the autumn of 2019 mostly due to water erosion of the loess areas. Erosion has been caused by the short-term heavy rainfall. As a result, suspended solids, soluble and insoluble phosphorus compounds leaked to the river. L1 - http://www.czasopisma.pan.pl/Content/118040/PDF/Kowalczyk%20Kopacz%20756.pdf L2 - http://www.czasopisma.pan.pl/Content/118040 PY - 2020 IS - No 47 EP - 112 DO - 10.24425/jwld.2020.135037 KW - composition of agricultural crops KW - nitrogen concentration KW - phosphorus concentration nitrogen load KW - phosphorus load KW - precipitation KW - total suspended solids A1 - Kowalczyk, Agnieszka W. A1 - Kopacz, Marek PB - Polish Academy of Sciences; Institute of Technology and Life Sciences - National Research Institute DA - 2020.12.21 T1 - Analysis of the surface water quality in the Szreniawa River catchment area SP - 105 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/118040 T2 - Journal of Water and Land Development ER -