  right|250px|thumb|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&nbsp;km long and the surface of its catchment area amounts to 2325&nbsp;km2. the wda's average gradient is 0.7â° and its flow is 6.52 m3/s. the wda begins its course at krÄÅ¼no lake and ends in the wisÅa in Åwiecie. the wda is one of the longest rivers in bory tucholskie and one of the most important of pomorze's river routes. ==geography== the source of wda is on rÃ³wnina charzykowska in krÄÅ¼no 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 tleÅ, then flows across wysoczyzna Åwiecka and ends in wisÅa in Åwiecie on dolina fordoÅska. ==lakes== *krÄÅ¼no *wieckie *lubiszewskie *schodno *radolne *wdzydze *Å»urskie the wdzydze lake along with lakes goÅyÅ, jeleÅ and sÅupinek are called morze kaszubskie.("morze kaszubskie") this lakes take a shape of the cross made of postglacial channels. wdzydze lake is dangerous for inexperienced canoeists during strong winds. ==towns== *lipusz *borsk *wojtal *czarna woda *wda *bÅÄdno *tleÅ *Å»ur *Åwiecie ==flora and fauna== 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 czubiÅski reserve âbrzÄkiâ 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. ==history== the name âwdaâ has been already used in the middle ages, but the river is also known as czarna woda. this name comes from dark brown colour of water caused by marshy banks, mineral molecules in water and sludge from tar factories in the 19th century. after world war i tourism started developing on wda and about 40 years later wda earned its title of the qu
Rivers_of_Poland