Freshwater Terminology Surface water -Precipitation that remains on the surface and does not seep into soil ·Runoff -Movement of surface water to lakes,rivers,etc. Watershed (drainage basin) Land area that delivers water into a stream or river system Groundwater Freshwater under the earth's surface stored in aquifers 。Aquifer Underground caverns and porous layers of sand,gravel and rock in which groundwater is stored Freshwater Terminology • Surface water – Precipitation that remains on the surface and does not seep into soil • Runoff – Movement of surface water to lakes, rivers, etc. • Watershed (drainage basin) – Land area that delivers water into a stream or river system • Groundwater – Freshwater under the earth’s surface stored in aquifers • Aquifer – Underground caverns and porous layers of sand, gravel and rock in which groundwater is stored