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ODTWORZENIE WARUNKÓW WODN YCH OSUSZONYCH JEZIOR W POLSCE – WYBRANE PRZYKŁADY

100%
Ptak M.
Badania Fizjograficzne Seria A - Geografia Fizyczna
|
2018
|
issue 9(69)
183-192
EN
In the past, human intervention in water relations focused mainly on draining wetlands and lakes. In general, this was aimed at increasing the area of agricultural land or creating new settlement areas. In the case of lakes, the consequence of such actions was to reduce their level and in many cases to completely dry them. The maintenance of appropriate, assumed environmental conditions requires, in the case of drainage systems, maintaining the high efficiency of the drainage system, which is time- and cost-intensive. Neglecting such an approach, or intentional actions in this respect may lead to the restoration (to a different spatial extent) of drained lakes. The examples presented in the paper indicate that this process is quite common. In the context of the need to expand the water retention of the country, a detailed search of such reservoirs should be carried out and their renaturalization should be considered.
2
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Batymetria jezior meteorytowych w rezerwacie „Meteoryt Morasko”

63%
Choiński A., Ptak M.
Acta Societatis Metheoriticae Polonorum
|
2017
|
vol. 8
23-29
EN
The paper presents results of bathymetric measurements performed on three crater lakes located in the “Meteoryt Morasko” reserve in west Poland. The maximum depth of the largest of the analysed lakes (1695 m2) was determined to amount to 2.6 m. The parameters of the lake (surface area, depth, etc.) are largely determined by a ditch dug through the crater in the north-western part of the lake, affecting the maximum water volume accumulated in the lake.
3
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ZMIANY BATYMETRII JEZIORA MIERZYŃSKIEGO

63%
Choiński A., Ptak M.
Badania Fizjograficzne Seria A - Geografia Fizyczna
|
2018
|
issue 9(69)
25-33
EN
The paper presents an analysis of changes in the bathymetry of Mierzyńskie lake, located in western Poland. It was found that over the last five decades this lake was characterized by exceptional stability in terms of changes in the surface area and volume of water, which decreased by 3.4 ha and 315,000 m3 respectively. The observed situation is quite different in comparison to the literature analysing the issue of lake evolution in Poland (indicating a faster rate of their disappearance). This specificity is due to the nature of the use of the catchment of this lake, which is characterised by an exceptionally high percentage of forest areas (considered to be the most natural) and negligible anthropopressure.
4
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OBIEKTY KRENOLOGICZNE W D OLNEJ CZĘŚCI DORZECZA WISŁY (PO ZLEWNIĘ DRWĘCY)

63%
Choiński A., Ptak M.
Badania Fizjograficzne Seria A - Geografia Fizyczna
|
2018
|
issue 9(69)
17-24
EN
On the basis of hydrographic maps in the scale 1:50,000, an inventory of crenological objects in the lower part of the Vistula basin up to the Drwęca river basin in the south was made. The total number of these objects in the analyzed area is 308, with the highest number of solid sources – 161, followed by leakages – 125 and periodic sources – 17. The total efficiency of all outflows is very low, as it was estimated at 0.075 m3∙s–1. The most efficient source reaches only 1.0 dm3∙s–1, and only a few 0.7 dm3∙s–1.
PL
On the basis of hydrographic maps in the scale 1:50,000, an inventory of crenological objects in the lower part of the Vistula basin up to the Drwęca river basin in the south was made. The total number of theseobjects in the analyzed area is 308, with the highest number of solid sources – 161, followed by leakages – 125 and periodic sources – 17. The total efficiency of all outflows is very low, as it was estimated at 0.075 m3∙s–1. The most efficient source reaches only 1.0 dm3∙s–1, and only a few 0.7 dm3∙s–1.
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