Impact of trout farms on water quality in the Marozka River (Mazurian Lakeland, Poland)
2006
Teodorowicz, M.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Environmental Protection Engineering | Gawronska, H. | Lossow, K. | Lopata, M.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Environmental Protection Engineering
In 2004, measurements of the chemical properties of the waters of the Marozka River in the Mazurian Lakeland (northern Poland) were taken eight times in order to determine the impact two trout farms located in Szwaderki (farm A) and Kurki (farm B) had on this river. The negative impact was manifested mainly through the increased nutrient content in the river waters. The annual total phosphorus (P) load increased downstream from farm A by 19.0 percent and from farm B by 26.1 percent, while the total nitrogen (N) load was higher by 22.6 percent and 10.3 percent, respectively. In the summer, water oxygen saturation downstream from the trout farms dropped considerably whereas other physicochemical parameters did not change notably
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