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Transcript of Water Pollution
How about the next generation to get a clean water ??
What definition and types of water pollution ?
A water pollutant is any substance that decreases the quality of water.
non point sources
Point-source pollutants are discharged directly from pipes or spills.
Non point design
These pollutants can only be traced to a general area
Self purification in river
The purification process depends on the makeup of the soil in the river bank and the distance of the well from the stream or river.
Phenomena of Eutrophication
Greatly influenced by the nature of lake ( location, depth)
lake water does not flow
The static water pollutants make the lake keeping it time to time
Does not have the self cleaning ability
What is the definition ground water?
Can be defined as an artificially induced degradation of water quality in nature.
Oil spills cause huge damage to the marine environment - but in fact are responsible for only around 12% of the oil entering the seas each year. According to a study by the US National Research Council, 36% comes down drains and rivers as waste and runoff from cities and industry.
Seas of garbage
Solid garbage also makes its way to the ocean. Plastic bags, balloons, glass bottles, shoes, packaging material – if not disposed of correctly, almost everything we throw away can reach the sea.
Plastic garbage, which decomposes very slowly, is often mistaken for food by marine animals. High concentrations of plastic material, particularly plastic bags, have been found blocking the breathing passages and stomachs of many marine species, including whales, dolphins, seals, puffins, and turtles. Plastic six-pack rings for drink bottles can also choke marine animals.
This garbage can also come back to shore, where it pollutes beaches and other coastal habitats.
Almost every marine organism, from the tiniest plankton to whales and polar bears, is contaminated with man-made chemicals, such as pesticides and chemicals used in common consumer products.
Some of these chemicals enter the sea through deliberate dumping. For centuries, the oceans have been a convenient dumping ground for waste generated on land. This continued until the 1970s, with dumping at sea the accepted practise for disposal of nearly everything, including toxic material such as pesticides, chemical weapons, and radioactive waste.
Non point source
Agricultural storm runoff comes from melting snow and rain that carries pesticides, animal wastes, nutrients and sediments into ground and surface waters. Other contributing sources of storm runoff are timber cutting, logging, and construction sites.
Industry plays a big part in the occurrence in point source pollution. The wastewater and industrial discharges consist of greases, oils, metals, and chemicals like PCB's, pesticides, and debris that will, at some point, make their way back to the rivers.
Non point sorces
Comes from sewage , agricultural and industrial.
Occurs when nutrient content is too high and growth of algal ‘bloom
Impact fishing activity ( changes fish size and species
Causes of Eutrophication
soil of erosion
Fertilizer & organic pesticides
Waste water / sewage
Discharge sewage from residential and industrial
The use of soap contain phosphate
METHODS TO CONTROL
Control dischage of sewage
Control of earthworks activities ( fertilizer & pesticide)
Control development in the area of lake.
Cause underground water pollution
Primary use of water in industrial plants for cooling ,cleaning and processing system.
Water cooling softened before being use for the prevention of crust produce waste water , salt and heat as a pollutant.
Occur when industrial water waste discharged into pits , ponds or lagoon and moved to the bottom faces of the water.
Tank and pipeline leak
Wastewater from urban areas can lead to bacteria , viruses and inorganic and organic chemicals into the soil and the contaminated the ground water may be used as a sources of drinking water.
3 main sources of marine pollution
Domestic and industrial
Oil and grease
Disposal of sludge
Disposal of solid waste
Disposal of oil and grease
Disposal industrial waste
Development of the coastal area
Change to the hydrological cycle
Marine pollution resulting from human activities .
Underground storage and delivery of various type of fuels and chemicals commonly used in industry which is prone to failure
The ingredients such as petroleum , gasoline ,fuel oil , liquid radioactive waste stored in underground water would be transferred to the face , causing serious pollution in ground water flow.
Changing drainage of sewage from entering the lake.
Increase effectiveness sewage treatment to reduce nutrient content.
Disposal of sewage on ground
Deepening the lake
Remove algae on the surface water
Causes of Eutrophication