Table 1 Locations and the hydrological conditions of three targeted dam reservoirs during the studied period

GPS coordinates (dam site)

50.0649169N, 13.9337606E

50.0879269N, 13.1279789E

48.8475817N, 14.4902242E

Trophic status

Oligotrophic

Meso-eutrophic

Meso-eutrophic

Total surface area (km²)

0.57

1.20

1.89

Mean depth (m)

10.9

7.6

15

Maximum depth (m)

30.3

20.2

41.4

Water retention time (year)

3.1

0.43

0.31

Mean inflow (m³/s)

0.06

0.68

2.93