Water Pollution Dante
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Transcript of Water Pollution Dante
BYMELÉNDEZ MORALES LUIS DANTE
Water pollution is any chemical, biological, or physical change in water quality that has a harmful effect on living organisms or makes water unsuitable for desired uses.
What pollutes water, where do these pollutants come from, and what effects do they have?
What are the major water pollution problems in streams and lakes?
What causes groundwater pollution, and how can it be prevented?
What are the major water pollution problems affecting oceans?
How can we prevent and reduce surface water pollution?
How safe is drinking water, and how can it be made safer?
Fig. 21-7, p. 501
Coal strip mine runoff
Polluted air
Deicing road salt
Pesticidesand fertilizers
Hazardous waste
injection well
Pumping well
Gasoline station
Water pumping well
LandfillSewer
Buried gasoline and solvent tanks
Cesspool, septic tank
Groundwater flow
Confined aquifer
Confined freshwater a
quifer
Unconfined freshwater a
quifer
Accidentalspills
Waste lagoonLeakage from faulty casing
Discharge
Fig. 21-10, p. 505
Healthy zoneClear, oxygen-richwaters promote growthof plankton and sea grasses,and support fish.
Oxygen-depleted zoneSedimentation and algaeovergrowth reduce sunlight,kill beneficial sea grasses, useup oxygen, and degrade habitat.
Red tidesExcess nitrogen causesexplosive growth of toxicmicroscopic algae,poisoning fish andmarine mammals.
FarmsRunoff of pesticides, manure, and fertilizers adds toxins and excess nitrogen and phosphorus.
Toxic sedimentsChemicals and toxic metals contaminate shellfish beds, kill spawning fish, andaccumulate in the tissues of bottom feeders.
Construction sitesSediments are washed intowaterways, choking fish and plants, clouding waters, and blocking sunlight.
Urban sprawlBacteria and viruses fromsewers and septic tanks contaminate shellfish beds
Oxygen-depletedzone
Closedbeach
CitiesToxic metals and oil from streets and parking lots pollute waters;
IndustryNitrogen oxidesfrom autos andsmokestacks,toxic chemicals,and heavy metals in effluents flow into bays and estuaries.
Closedshellfish beds
DIFFERENTS WAYS TO CONTAMINATE THE WATER
en.wikipedia.org/wiki/Water_pollution - 98k www.umich.edu/~gs265/society/waterpollution.htm www.water-pollution.org.uk/ - 7k web.worldbank.org/external/projects/main?
pagePK=64283627&piPK=64624214&theSitePK...P037382 - 55k
www.geocities.com/RainForest/5161/water1.htm - 14k
www.lenntech.com/Water-Pollution-FAQ.htm - 17k www.ec.gc.ca/water/en/manage/poll/e_poll.htm - 29k www.nlm.nih.gov/medlineplus/waterpollution.html -
47k www.niehs.nih.gov/health/topics/exposure/water-
poll/index.cfm