Druzno Lake basin as an example of polder function and function of polder water-melioration systems

The main idea behind the information of polders was agricultural production. At present polders are used to realize more and more non-agricultural functions. Some polders can be renaturalized. Polder water-melioration systems determine settlement and economic activities in the polders including farming. They are formed by embankments, pump station, canals and reservoirs, drain ditch networks, irrigation devices and roads which are indispensable for the system to work.The aim of the work is identification and estimation of the funtions of polder areas using the example of DruznoLake Basin in Zulawy region.