Wda
The Wda is a river in Poland. It has a lowland character. The Wda is one of the 15 main canoe trails in Poland. It is 198 km long and the surface of its catchment area amounts to 2325 km2. The Wda's average gradient is 0.7‰ and its flow is 6.52 m3/s.
The Wda begins its course at Krążno Lake and ends in the Wisła in Świecie. The Wda is one of the longest rivers in Bory Tucholskie and one of the most important of Pomorze's river routes.
The source of Wda is on Równina Charzykowska in Krężno Lake. The river flows through the area of Bory Tucholskie, Wdzydzki Landscape Park and Wdecki Landscape Park.
There is one river's canal below Wdzydze Lake. The river reaches Tleń, then flows across Wysoczyzna Świecka and ends in Wisła in Świecie on Dolina Fordońska.
The Wdzydze Lake along with lakes Gołyń, Jeleń and Słupinek are called Morze Kaszubskie. This lakes take a shape of the cross made of postglacial channels. Wdzydze Lake is dangerous for inexperienced canoeists during strong winds.
Wda runs through many multispecies deciduous forests, in which contains diverse lichens. The river meanders also through riparian forests and alder forests. Rare mountain ash brekinii can be found in the Zygmunt Czubiński Reserve “Brzęki” in Szczerkowo. Next rare and protected plants on Wda's route are: lycopodium clavatum, diphasiastrum complanatum, lycopodium annotinum, sundew, western marsh orchid, heath spotted orchid, lesser butterfly-orchid, broad-leaved helleborine, european common twayblade and arctostaphylos uva-ursi, which are found in Wdecki Landscape Park. This region of Poland houses species like: cranes, common goldeneyes, goosanders, western marsh harriers, ruffs, kingfishers, trouts, common vipers, fire salamanders, tree frogs and great crested newts.
...
Wikipedia