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