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Factors controlling hydrochemical and trophic state variables in 86 shallow lakes in Europe |
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| Authors: | Nõges Peeter Nõges Tiina Tuvikene Lea Smal Halina Ligeza Slawomir Kornijów Ryszard Peczula Wojciech Bécares Eloy Garcia-Criado Francisco Alvarez-Carrera Christina Fernandez-Alaez Camino Ferriol Carmen Miracle Rosa Maria Vicente Eduardo Romo Susana Van Donk Ellen van de Bund Wouter Jensen Jens Peder Gross Elisabeth M. Hansson Lars-Anders Gyllström Mikael Nykänen Mirva de Eyto Elvira Irvine Kenneth Stephen Deborah Collings Sally Moss Brian |
| Affiliation: | 1. Department of Chemistry and Environmental Engineering, Rzeszów University of Technology, Poland 2. 2 W. Pola Street, 35-959, Rzeszów, Poland |
| Abstract: | The total nitrogen mass balance was studied over a two-year period in two reservoirs located in south-eastern Poland. Theobserved nitrogen retention (Nret) inthe reservoirs ranged from 0.18 to 2.12g m-2d-1 (mean 0.83g m-2d-1) in case of theRzeszów Reservoir and from -0.02 to0.41 g m-2d-1 (mean 0.13g m-2d-1) in case of the SolinaReservoir, while the percentage retention(Nret) ranged from 7 to 42% (mean22%) and -15 to 73% (mean 35%),respectively. A good relationship betweenNret and nitrogen loads was observedfor the Solina Reservoir. The data obtainedby the author and collected from theresearches of 6 other reservoirs located insouthern Poland were used to develop anempirical model suitable to predict thenitrogen seasonal dynamics in a reservoir.The model allows for the determination ofboth the annual mean Nret value andits seasonal variation in a reservoir. |
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