5 Water Resources of Stagnant Waters
81
a
b
c
Fig. 5.6 Variability of the surface area of lakes located near each other; A – Lake Cisie – example
of stability of surface area; B – Lake Gr˛ a˙ zyk – an example of drastic disappearance; C – a system
of Lakes Chobienicko-Wielkowiejskie-Kopanickie – development of new lakes as a result of a
decrease in the surface area of larger lakes
81
a
b
c
Fig. 5.6 Variability of the surface area of lakes located near each other; A – Lake Cisie – example
of stability of surface area; B – Lake Gr˛ a˙ zyk – an example of drastic disappearance; C – a system
of Lakes Chobienicko-Wielkowiejskie-Kopanickie – development of new lakes as a result of a
decrease in the surface area of larger lakes