Redistribution - Water is redistributed by the 3 main cycles. Water can evaporate from the ocean, condensate and evaporate. Whether in a city or in the middle of a country, water will either ravel down to underground water sources or become runoff and channel into lakes, rivers and ponds. Water can travel down rivers and go from one area to another.
Purification
Distillation - When the water is evaporated into the atmosphere, the water vapor rises up while the salt from the sea water is left behind.