Zmiany powierzchni jezior na Pojezierzu Wielkopolsko-Kujawskim w XX w.
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Date
2007
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Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk
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Abstract
The study presents the changes of lake surfaces
in Wielkopolsko-Kujawskie Lake District
in the 20th century. The changes are the result
of natural processes (the oscillations of climate,
sedimentation) as well as artificial ones – caused
by man (the barring of rivers, the drainage of
the terrain etc.). The above mentioned area, as
one of the most economically developed in the
country, was quite early subjected to hydotechnical
works. It is stated, based on the calculations, that in the discussed area there are
1212 lakes (of the surface bigger than 1 hectare)
whose total surface is 40037,7 hectares and these
are much smaller than the ones noted at the
beginning of the 20 th century which were
surface changes, this area was correlated with
natural factors, such as for example the size of
precipitation. This analysis, did not bring the
clear answer to our question. To provide a detailed
answer to this question, one has to carry
out a multi-faceted analysis however, this exceeds
the scope at the present study. Assuming
that present disappearance, that is 19.2%, would
remain constants for a hundred years
(19.2%/100), we can state that the lakes of Wielkopolsko-
Kujawskie Lake District will disappear
in about 500 years.
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Citation
Badania Fizjograficzne, Seria A, Tom 58, 2007, s. 149-157
ISBN
978-83-7063-538-1