Glacier can provide fresh water.
Fresh water is naturally occurring water on Earth 's surface in ice sheets , ice caps , glaciers , icebergs , bogs , ponds , lakes , rivers and streams , and underground as groundwater in aquifers and underground streams . Glacier . Glacial ice is the largest reservoir of fresh water on Earth . Many glaciers from temperate , alpine and seasonal polar climates store water as ice during the colder seasons and release it later in the form of meltwater as warmer summer temperatures cause the glacier to melt , creating a water source that is especially important for plants , animals and human uses when other sources may be scant .