30-11-2012, 11:49 AM
WATER POLLUTION AND IT’S PREVENTION
PPT ON WATER POLLUTION.ppt (Size: 1,002 KB / Downloads: 84)
POLLUTION
ANY UNDESIRABLE CHANGE IN THE PHYSICAL, CHEMICAL & BIOLOGICAL CHARACTERISTICS OF ANY CAMPONENT OF THE ENVIRONMENT (AIR,WATER,SOIL), WHICH CAN CAUSE HARMFUL EFFECTS ON VARIOUS FORMS OF LIFE.
TYPE OF POLLUTION
AIR POLLUTION
WATER POLLUTION
SOIL POLLUTION
NOISE POLLUTION
THERMAL POLLUTION
MARINE POLLUTION
NUCLEAR POLLUTION
WATER POLLUTION
Any chemical, biological, or physical change in water quality that has a harmful effect on living organisms or makes water unsuitable for desired usage.
Water makes us unique and gives life to Earth.
According to WHO:-
3.4 million premature deaths each year from waterborne diseases
1.9 million from diarrhea
Major Sources of Water Pollution
Agriculture: by far the leader
Sediment, fertilizers, bacteria from livestock, food processing, salt from soil irrigation
Industrial: factories and powerplants
Mining: surface mining toxics, acids, sediment
India’s Ganges River
Holy River (1 million take daily holy dip)
350 million (1/3rd of pop) live in watershed
Little sewage treatment
Used for bathing, drinking etc.
Bodies (cremated or not) thrown in river
Good news is the Indian government is beginning to work on problem
Groundwater
Groundwater can become contaminated
No way to cleanse itself
Little dilution and dispersion
Out of sight pollution
Prime source for irrigation and drinking
REMOVAL of pollutant difficult
CONCLUSION
In order to meet water quality criteria in rivers, dilution water is required besides stringent pollution control.
Interlinking of rivers is one of the solution to meet water quality criteria in rivers as more dilution of water would be available in rivers.