vodné toky 5 [vynechat] water streams kvalita vody 2 [vynechat] rieky 2 [vynechat] rivers 2 [vynechat] water quality 2 [vynechat] biodiversity 1 [vynechat] biodiverzita 1 [vynechat] eutrofizácia vôd 1 [vynechat] eutrophication 1 [vynechat] flood control 1 [vynechat] floods 1 [vynechat] hydraulic structures 1 [vynechat] hydrology 1 [vynechat] hydrológia 1 [vynechat] lowlands 1 [vynechat] nížiny 1 [vynechat] povodia 1 [vynechat] povodne 1 [vynechat] protipovodňová ochrana 1 [vynechat] tourist sights 1 [vynechat] turistické zaujímavosti 1 [vynechat] vodné diela 1 [vynechat] vodné hospodárstvo 1 [vynechat] vodné rastliny 1 [vynechat] water management 1 [vynechat] water plants 1 [vynechat] watersheds 1 [vynechat]