108
J. Dawidek et al.
A
B
Fig. 6.13 Bathymetric scans of selected floodplain lakes in the Vistula River Valley (A-Smolno,
B-Martówka)
largest rivers in the eastern part of Poland (e.g., Lower San, Lower Wieprz, Middle
and Lower Bug, Middle and Lower Narew, Biebrza, Pisa) belong to the areas with
relatively low anthropopression. The lakes in their valleys are numerous, and the
degree of transformation of water relations in their lymnophasic drainage basins
should be described as moderate or small. The western wing of the Vistula basin
and the Odra basin is characterized by an increase in hydrotechnical interventions in
river valleys. The effects of the main regulatory works contributed to changes in the
surface of lakes. Hydrotechnical works also affect the problem of lake water quality
in the hydrochemical (ionic composition) and hydrobiological sense (composition
and biomass of phytoplankton, zooplankton and microplankton).
A good example of lake surface changes is the Vistula valley. There are some
problems with defining the shoreline of objects, especially in the case of basins
connected and forming compact complexes. However, such changes were the subject
of research mainly on the regulated section of the Vistula (from Włocławek to Tczew).
Studies of various details concerned both short and long sections of the valley [44,
47, 59]. They also included changes in the hydrographic network of the Vistula from
J. Dawidek et al.
A
B
Fig. 6.13 Bathymetric scans of selected floodplain lakes in the Vistula River Valley (A-Smolno,
B-Martówka)
largest rivers in the eastern part of Poland (e.g., Lower San, Lower Wieprz, Middle
and Lower Bug, Middle and Lower Narew, Biebrza, Pisa) belong to the areas with
relatively low anthropopression. The lakes in their valleys are numerous, and the
degree of transformation of water relations in their lymnophasic drainage basins
should be described as moderate or small. The western wing of the Vistula basin
and the Odra basin is characterized by an increase in hydrotechnical interventions in
river valleys. The effects of the main regulatory works contributed to changes in the
surface of lakes. Hydrotechnical works also affect the problem of lake water quality
in the hydrochemical (ionic composition) and hydrobiological sense (composition
and biomass of phytoplankton, zooplankton and microplankton).
A good example of lake surface changes is the Vistula valley. There are some
problems with defining the shoreline of objects, especially in the case of basins
connected and forming compact complexes. However, such changes were the subject
of research mainly on the regulated section of the Vistula (from Włocławek to Tczew).
Studies of various details concerned both short and long sections of the valley [44,
47, 59]. They also included changes in the hydrographic network of the Vistula from