groundwater
subsidence
runoff
a large natural or artificial lake used as a source of water supply.
reservoir
water held underground in the soil or in pores and crevices in rock.
a source of pollution that issues from widely distributed or pervasive environmental elements.
water that collects on the surface of the ground.
water shed
the draining away of water from the surface of an area of land, a building or structure, etc.
water pollution
point source
bio-accumulation
surface water
non-point source
Bioaccumulation is the accumulation of substances, such as pesticides, or other chemicals in an organism.
Water pollution is the contamination of water bodies, usually as a result of human activities.
an area or ridge of land that separates waters flowing to different rivers, basins, or seas.
a localized and stationary pollution source.
the gradual caving in or sinking of an area of land.
