Water Pollution . Chapter 21. Sources. Point Source . Non Point Source . Types. Organic Inorganic Radioactive Thermal. Organic. Nitrogen Phosphorous Dead Stuff Pathogens Sh ee t. Cultural (anthropogenic) Eutrophication. Cholera . Lake Pollution. Eutrophication. Eutrophication.
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Non Point Source
Cultural (anthropogenic) Eutrophication
and solvent tanks
Unconfined freshwater aquifer
Confined freshwater aquifer
Fig. 21-7, p. 501
Contaminant plume moves
with the groundwater
Fig. 21-8, p. 502
from autos and
and heavy metals in effluents flow into bays and estuaries.
Toxic metals and oil from streets and parking lots pollute waters;
Bacteria and viruses from
sewers and septic tanks contaminate shellfish beds
Sediments are washed into
waterways, choking fish and plants, clouding waters, and blocking sunlight.
Runoff of pesticides, manure, and fertilizers adds toxins and excess nitrogen and phosphorus.
Excess nitrogen causes
explosive growth of
poisoning fish and
Chemicals and toxic metals contaminate shellfish beds, kill spawning fish, and
accumulate in the tissues of bottom feeders.
Sedimentation and algae
overgrowth reduce sunlight,
kill beneficial sea grasses, use
up oxygen, and degrade habitat.
waters promote growth
of plankton and sea grasses,
and support fish.
Fig. 21-10, p. 505