6 Natural and Anthropogenic Lakes of River Valleys
89
Fig. 6.1 Lakes in the River valeys
lakes located in the Bug river valley, one of very few large, quasi-natural European
rivers in Eastern Poland was selected. A functional analysis of lake basins allowed
the construction of uniform floodplain lakes classifications.
Bathymetric research was conducted in all seasons, at different water levels of
the floodplain lakes. Measurements were made using echo sounder or probe weights
(in lakes where intense bottom vegetation was observed) and a GPS receiver. In
addition crevasses that connect floodplain lakes with the parent river were identified,
and water distribution was determined during the spring potamophase periods.
6.4 Typology of Floodplain Lakes
6.4.1 Natural Lakes
The floodplain lakes are characterized by cyclical changes in the basin’s supply forms.
In general, there are four phases of the cycle: filling, flooding, drainage and isolation
[19, 20]. There is also a division into two basic functional periods called limnophase
and potamophase or inundation and isolation phase [21–23]. In the limnophase,
the lake has its catchment that can be determined. It is also possible to determine
89
Fig. 6.1 Lakes in the River valeys
lakes located in the Bug river valley, one of very few large, quasi-natural European
rivers in Eastern Poland was selected. A functional analysis of lake basins allowed
the construction of uniform floodplain lakes classifications.
Bathymetric research was conducted in all seasons, at different water levels of
the floodplain lakes. Measurements were made using echo sounder or probe weights
(in lakes where intense bottom vegetation was observed) and a GPS receiver. In
addition crevasses that connect floodplain lakes with the parent river were identified,
and water distribution was determined during the spring potamophase periods.
6.4 Typology of Floodplain Lakes
6.4.1 Natural Lakes
The floodplain lakes are characterized by cyclical changes in the basin’s supply forms.
In general, there are four phases of the cycle: filling, flooding, drainage and isolation
[19, 20]. There is also a division into two basic functional periods called limnophase
and potamophase or inundation and isolation phase [21–23]. In the limnophase,
the lake has its catchment that can be determined. It is also possible to determine