Wyniki wyszukiwania

1

External input to Lake Wadag - effective and estimate loadings

100%

Lossow K., Gawronska H.

Polish Journal of Environmental Studies

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1998

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tom 07

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nr 2

Comparison was made of effective and estimated loads of phosphorus and nitrogen coming from the catchment area to Lake Wadąg. It was concluded that the effective loads of phosphorus based on direct measurements were much similar to values obtained from the estimation method covering only diffused pollution sources. This seems to point out that external loads to lakes calculated as unit run-off of nutrients from dispersed, non-point (diffused) and point sources are too high (at least in the conditions of Pojezierze Olsztyńskie). Big discrepancies in run-off regarding effective nitrogen loads imply that the estimated values should be treated rather critically.

2

Impact of anthropogenic pressure on aquatic conditions in Lake Track in Olsztyn

72%

Grochowska J., Gawronska H.

Archiwum Ochrony Środowiska

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2005

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tom 31

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nr 2

3

Models of phosphorus turn-over in a hypertrophic lake: the Lake Swarzedzkie case study

51%

Kowalczewska-Madura K., Goldyn R.

Oceanological and Hydrobiological Studies

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2010

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tom 39

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nr 3

4

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Preliminary characterization of the trophic state of Maly Kopik Lake near Olsztyn and its drainage basin as a supplier of biogenic substances

51%

Grochowska J., Tandyrak R.

Journal of Elementology

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2008

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tom 13

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nr 1

The study was carried out on a small (7.8 ha) and shallow (9.0 m) lake Mały Kopik, situated 9 km on south western from Olsztyn, drainage basin of Giłwa and Pasłęka rivers. The catchment area of the lake is 194.7 ha. Forests cover the most of the drainage basin area (64.2%), agriculture land comprises 28.7% (21% grass land and 7.7% arable land) and urban land - 7.1%. Lake Mały Kopik is not susceptible to degradation (III category), and drainage basin having a great potential for supplying matter to the reservoir, was included in basin category 4. The lake with its drainage basin belong to the 4th type of lake-drainage basin ecosystems. In such a system the natural eutrophication of the lake is expected to proceed at a fast rate. As evidenced in the study, lake Mały Kopik is highly eutrophic reservoir. The lake waters were characterized by a high content of nutrients, up to 0.673 mg P·dm-3 and 10.61 mg N·dm-3. The high fertility of the lake was exhibited also by the values of BOD5 reaching 7.5 mg O2·dm-3, chlorophyll a content - 50 µg·m-3, and low water transparency - 2 m.

Ograniczanie wyników

1 Archiwum Ochrony Środowiska

1 Journal of Elementology

1 Oceanological and Hydrobiological Studies

1 Polish Journal of Environmental Studies

2 Gawronska H.

2 Grochowska J.

1 Goldyn R.

1 Kowalczewska-Madura K.

1 Lossow K.

1 Tandyrak R.

1 2010

1 2008

1 2005

1 1998

External input to Lake Wadag - effective and estimate loadings

Impact of anthropogenic pressure on aquatic conditions in Lake Track in Olsztyn

Models of phosphorus turn-over in a hypertrophic lake: the Lake Swarzedzkie case study

Preliminary characterization of the trophic state of Maly Kopik Lake near Olsztyn and its drainage basin as a supplier of biogenic substances