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  • Water Pollution2nd lecturewww.draloufi.com
  • ‫ﻘﺎل ﺗﻌﺎﻠﻰ وﺠﻌﻟﻨﺎ ﻤﻦ اﻠﻣﺎء ﻜﻞ ﺸﻲء ﺣﻲ ا ٔ ﻓﻼ ﻳﺆﻤﻨﻮن ‪‬‬ ‫‪‬‬ ‫ﻪِ ‪: ‬‬ ‫‪‬‬ ‫ﻋﻦ ا ٔ ﺑﻲ ﻫﺮﻳﺮة ﻘﺎل رﺴﻮل اﻠﻟ‬ ‫ﺬ ِ يﻻ َ ﻳ َ ‪ ْ ‬ﺮ ِيﺛ ُ ﻢ ﺗ َ ﻐ ْ ﺘ َ ﺳ ِ ﻞ ُ ﻤ ِﻨ ْ ﻪ ُ ‪. ‬‬ ‫ﺟ‬‫ﻣ َ ﺎء ِ اﻠﺪ ﻓﻲ اﺋ ِﻢاﻳ ِ َ ٓ ﺒﺧﺮ :َﻻ ﻫ‪ َ ُ ‬ﻦ َ ﺠ ُ ﻨ ُ ﺐ ٌ ، ﺛ ُ ﻢ ﻳ َ ﻐ ْ ﺘ َ ﺳ ِ ﻞ ُ‬ ‫و ﻠﻔﻆ و ُ ﻮﻠ َ ﻮ‬ ‫ﻓ ِ ﻴﻪ ِ ‪‬‬ ‫:‬ ‫ﻪِ ‪‬‬ ‫‪‬‬ ‫و ﻋ َ ﻦ ْﻋ َﺠﻦَ ْﺎﺑ ِ رﺮ َ ﺴ ُ ﻮل ِ اﻠﻟ‬ ‫َ ﻬ َ ﻰ ا ن ْ ﻳ ُ ﺒ َ ﺎل َ‪ ‬ﻓ ِ ﻲ اﻠ ْ ﻣ َ ﺎء ِ اﻠﺮ اﻜ ِ ﺪ ِ ‪‬‬ ‫- رواﻫﺎ ﻤﺳﻟﻢ‬
  • Secret of life ! Why ?
  • Water is Essential to life on Earth.
  • Importance of waterOrganisms are composed of much water––70%-95% Supportive external environment for aquatic organisms Cellular medium within which biochemical reactions can occur Transport medium for food, oxygen, and other things needed by cells Means of support-Turgid plant cells /Hydrostatic animal support systems
  •  Two main processes: precipitation and evaporation Powered by energy from the sun Hydrologic cycle purifies water
  • Three Forms of Water. Solids: When water becomes very cold and freezes it will change from a liquid to a solid. It has a definite form and shape. Liquids: When water takes the shape of its container it is in a liquid form. Gases: When water is seen in a vapor form and has no definite size or shape it is in a gas form.
  • Distribution of global water
  • Distribution of global water
  • The earths Water Supply97.2% of the Earths water supply is salt water.Only 2.8% is fresh water!
  • Salt and freshwater relationship
  • World Water Supply97.200% salt water in the oceans02.014% ice caps and glaciers00.600% groundwater00.009% surface water00.005% soil moisture00.001% atmospheric moisture
  • Earth as water planet Earth is often referred to as `the water planet. Earth is unique amongst planets of our solar system because of its abundant water - in oceans, in the atmosphere, in glaciers and as fresh water on land. Without water, life could not exist.
  • The earths freshwater supply Only about 3% of Earths water is fresh. Two percent of the Earths water (about 66% of all fresh water) is in solid form, found in ice caps and glaciers. One percent of all the Earths water in a form useable to humans and land animals. This fresh water is found in lakes, rivers, streams, ponds, and in the ground. (A small amount of water is found as vapor in the atmosphere.)
  • Distribution of water Ocean Water: The vast majority of water on the planet is the salt water in the oceans and seas. Fresh Surface Water: This is the fresh water in rivers, streams, lakes, ponds and similar bodies of water. Groundwater: The majority of the planets liquid freshwater is stored in underground aquifers. Water that enters an aquifer remains there for an average of 1,400 years!
  • Water : A precious Natural Resource  We use water for drinking, irrigation, industrial purposes and energy production. Water use  agriculture and energy production - 80%  industry and public use - 20%
  • Water is used in many ways as a nourisher of plant and animal life, a bearer of food, a prime element of industrial processes, and a medium for transportation
  • Water consumption/ countries
  • Human activity disrupts local water cyclesIrrigationClear cutting of forestsWatershed disturbanceLoss of minerals through runoffDesertification
  • Water consumption/use
  • Daily use of water
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