Water scarcity
Water scarcity, insufficient freshwater resources to meet the human and environmental demands of a…
Glacier
Glacier, any large mass of perennial ice that originates on land by the recrystallization of snow or other…
Water purification
Water purification, process by which undesired chemical compounds, organic and inorganic materials, and…
Aqueduct
Aqueduct, (from Latin aqua + ducere, “to lead water”), conduit built to convey water. In a restricted sense,…
Water cycle
Water cycle, also called hydrologic cycle, cycle that involves the continuous circulation of…
Groundwater
Groundwater, water that occurs below the surface of Earth, where it occupies all or part…
Indus River
Indus River, Tibetan and Sanskrit Sindhu, Sindhi Sindhu, or Mehran, great trans-Himalayan river of South Asia. It is…
Water well
Aquifer Aquifer, in hydrology, rock layer that contains water and releases it in appreciable amounts. The rock…
