The ROLE of WATER• Water plays an important role in our life• Most of activities and lives are influenced by water
Although 97% of the world is covered in water, only 3% is fresh water.
The HYDROLOGIC Cycle- Is a constant recycling process of WATER- Having two important processes: evaporation and condensation of WATER.- The process of WATER evaporated from the leaves of plans (which take up water from the soil) called evapotranspiration.
Human influences on the Hydrologic CycleHuman activities can influence the hydrologiccycle in many ways.Some aspects of the hydrologic cycle can beutilized by humans for a direct economic benefit.
Kinds and Sources of Pollution Municipal Water Pollution Agricultural Water Pollution Industrial Water Pollution Thermal Pollution Marine Oil Pollution Groundwater Pollution
Municipal Water Pollution Municipalities are faced with the double-edged problem of providing suitable drinking water and disposing of wastes.• These wastes consist of storm water runoff, wastes from industry, and wastes from homes and commercial establishments.• Wastes from homes consist primarily of organic matter from food preparation, cleaning of clothes and dishes, and human wastes.
Agricultural Water Pollution• Agricultural activities are the primary cause of water pollution problems.• Water pollution from agricultural farms not only damages the environment and kills wildlife, but it can also kill people.
Industrial Water Pollution• Industry is a huge source of water pollution, it produces pollutants that are extremely harmful to people and the environment.• Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans.
Thermal PollutionThermal pollution is the degradation ofwater quality by any process that changesambient water temperature.A common cause of thermal pollution is theuse of water as a coolant by power plantsand industrial manufacturers.
Marine Oil PollutionOil-polluted stormwater and sewage frommunicipalities, dribbing and drabbing from numeroussources in coastal facilities, gaseous hydrocarbonsfrom our cars and motor boats, and many more suchon-land or recreational coastal activities that we donot link to marine oil pollution - those are theconstant sources of a large and never-ending input ofoil to the marine environment.
Groundwater PollutionA groundwater pollutant is any substance that, whenit reaches an aquifer , makes the water unclean orotherwise unsuitable for a particular purpose.Sometimes the substance is a manufacturedchemical, but just as often it might be microbialcontamination. Contamination also can occur fromnaturally occurring mineral and metallic deposits in.
WATER-use planning issuesThere are three main basic WATER services:• Water supply for human and industrial needs• Waste water collection treatment• Stormwater collection and management
To meet future needs, urban, agricultural and national interests will need to deal these issues:• Increased demand for water will generate force to supply water for human’need.• Improving the system for treatment and purify.• When water used to flush the salt from the soil is returned on stream and the quality is lower.
• If the ground water is pumped out faster than it is replaced, the water table is lowered.• In the coastal area, seawater may intrude into the aquifer and ruin the water supply.• The demand for water based recreation is increasing dramatically.