US EPA

1695713 

Journal Article 

Assessment of Biogenic Compounds Eluted from the Catchment of Debina River 

Sojka, M 

2009 

1 

Rocznik Ochrona Środowiska
ISSN: 1506-218X
EISSN: 2720-7501 

11 

1225-1234 

WOS:000281370800042 

The aim of this research was an assessment of water quality and biogenic compounds loads eluted from the small catchment of the Debina River. The river flows through the Kleckie Lake which is strongly polluted and susceptible to degradation [5]. The basis of this paper were results of field study conducted in 2007 hydrological year in the catchment of the Debina River down to Borzatew cross-section. Assessment of a physico-chemical state of the river was made according to Polish river water quality standards [6, 7]. Annual loads of ammonium nitrogen, nitrate nitrogen, nitrite nitrogen and phosphorus were computed on the basis of statistical methods [4]. Total nitrogen and phosphorus loads were calculated as products of the mean flow and mean concentrations of N(og). and P(og). The water of Debina River were characterized by a high concentration of nitrate and low concentration of ammonium nitrogen. Mean concentrations of nitrite ranged from 6.0 mg NO(3).dm(-3) in summer half year to 54.8 mg NO(3).dm(-3) in winter half year. The annual loads of nitrogen and phosphorus compounds were differentiated. The nitrate nitrogen loads leaching from the catchment were the highest and equal to 10.25 N-NO(3) kg.ha(-1) yr(-1), and nitrite nitrogen loads were the lowest and equal to 0.12 N-NO(2) kg ha(-1) y(-1). Analyses of nitrogen compounds leaching from the catchment of the Debina River showed that in the winter half years they reached 83% of annual loads. In summer half year the loads were smaller and amounted 1.24 kg ha(-1) yr(-1). The load of total nitrogen leaching from the catchment achieved 11.54 kg ha(-1) yr(-1), in which nitrate nitrogen load amounted to 89% and nitrate nitrogen and ammonium nitrogen about 1% only. In order to reduce nitrate nitrogen loads flowing into the Klecko Lake it is necessary to decrease the use of fertilizers and to create biogeochemical zones along the river course and to build sewage networks.