Water Pollution

Topics: Water, Water pollution, Water supply Pages: 12 (1800 words) Published: June 11, 2014
ENVIRONMENTAL MANAGEMENT

Assignment:

WATER POLLUTION

1) What is water pollution?

2) What causes water pollution?

3) Name the 2 sources of pollution

4) What are the different types of water pollution?

5) How can water pollution be prevented?

6) Pollution can be: MICROBIOLOGICAL, CHEMICAL, SUSPENDED MATTER, NUTRIENTS, OXYGEN-DEPLETING SUBSTANCES.

Give one real example for each cse with a brief explanation.

1) 1- Water pollution is the contamination of water bodies, very often by human activities.

2- Water pollution is caused by:
• Industrial waste
•Sewage and waste water
•Mining activities
•Marine dumping
•Accidental oil leakage
•Burning of fossil fuels
•Leakage from sewer lines
•Chemical fertilizers and pesticides
•Global warming
•Radioactive waste
•Urban development
•Leakage from thr landfills
•Animal waste
•Underground storage leakage

3) Point-source pollutants in surface water and groundwater are usually found in a plume that has the highest concentrations of the pollutant nearest the source (such as the end of a pipe or an underground injection system) and diminishing concentrations farther away from the source. The various types of point-source pollutants found in waters are as varied as the types of business, industry, agricultural, and urban sources that produce them. If the facility or operator does not handle, store and disposed of the raw materials and wastes properly, these pollutants could end up in the water supply. This may occur through discharges at the end of a pipe to surface water, discharges on the ground that move through the ground with infiltrating rainwater, or direct discharges beneath the ground surface. Nonpoint-source pollution occurs as water moves across the land or through the ground and picks up natural and human-made pollutants, which can then be deposited in lakes, rivers, wetlands, coastal waters, and even groundwater. The water that carries nonpoint-source pollution may originate from natural processes such as rainfall or snowmelt, or from human activities such as crop irrigation or lawn maintenance.

Nonpoint-source pollution is usually found spread out throughout a large area. It is often difficult to trace the exact origin of these pollutants because they result from a wide variety of human activities on the land as well as natural characteristics of the soil, climate, and topography. The most common nonpoint-source pollutants are sediment, nutrients, microorganisms and toxics. Sediment can degrade water quality by contaminating drinking water supplies or silting in spawning grounds for fish and other aquatic species. Nutrients, microorganisms, and other toxic substances can dangerous to human health and aquatic life.

This silt-laden runoff from a residential area contains not only soil and clay particles from nearby construction, but also is likely to contain small amounts of lawn chemicals, oil, grease, gasoline, and even residues from recent highway de-icing. These are all examples of pollutants released from nonpoint sources.

4) There are different types of water pollution:

Chemicals:Industrial and agricultural work involves the use of many different chemicals that can run-off into water and pollute it.These are poisonous to aquaticlife and could also affects humans and birds because as we eat fish, if they are infected, in some way affects our health and our body. Some examples of these chemicals could be metals, solvents and petrol from industrial activities and pesticides from agriculture.

Microbiological:This is a natural form of water pollution caused by microorganisms such as bacterias, viruses and protozoas. The consequences are diseas that could affect fishes, humans and land animals.

Suspended Matter: These is causes because of suspended particles of pollutants that couldn t disolved on water on water. These could harm aquatic life...
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