Natural Waters Of The Earth

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Natural Waters Of The Earth

  1. 1. Natural Waters of the Earth Junhel C. Dalanon, DMD, MAT SNSCLC – Minglanilla Minglanilla, Cebu, Philippines 6046
  2. 2. Natural Water Resources <ul><li>14, 400 km 3 of water on Earth </li></ul><ul><li>Part of this water becomes Ground Water </li></ul><ul><li>Ground Water is water that seeps into the ground caused or pulled by gravity </li></ul><ul><li>Rain is the most important source of Ground Water </li></ul><ul><li>Amount of Ground Water is caused by: </li></ul><ul><ul><ul><li>Porosity of rocks </li></ul></ul></ul><ul><ul><ul><li>Porosity of soil </li></ul></ul></ul><ul><li>Water Table – top layer of the saturated layer </li></ul>
  3. 3. Classification of Natural Water <ul><li>Ground Water </li></ul><ul><ul><ul><li>Springs </li></ul></ul></ul><ul><ul><ul><li>Wells </li></ul></ul></ul><ul><li>Surface Water </li></ul><ul><ul><ul><li>Lakes </li></ul></ul></ul><ul><ul><ul><li>Rivers </li></ul></ul></ul><ul><ul><ul><li>Swamps </li></ul></ul></ul>
  4. 4. Springs <ul><li>Formed when: </li></ul><ul><ul><ul><li>Ground water naturally finds its way to the surface </li></ul></ul></ul><ul><ul><ul><li>In a fracture so flow of water is continuous </li></ul></ul></ul><ul><ul><ul><li>On a hillside but flow is not continuous </li></ul></ul></ul><ul><li>Contains dissolved minerals – Mineral Spring </li></ul><ul><li>Said to have curative effects from rheumatism & arthritis </li></ul>
  5. 5. Wells <ul><li>Formed when hole is dug below the water table and water continuously forms </li></ul><ul><li>Aquifer </li></ul><ul><ul><li>Saturated layer between two impermeable rock layers that prevent water from evaporating </li></ul></ul><ul><ul><li>Prevents contamination </li></ul></ul><ul><li>Depth should not be less than 10 meters </li></ul>
  6. 6. Lakes <ul><li>Uses to man: </li></ul><ul><ul><ul><ul><li>Source of livelihood </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Generate electricity </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Transportation </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Beauty </li></ul></ul></ul></ul><ul><li>Some of the famous lakes in the Philippines: </li></ul><ul><ul><ul><ul><li>Paoay Lake </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Lake Lanao </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Laguna de Bay </li></ul></ul></ul></ul><ul><li>Formed through: </li></ul><ul><ul><ul><li>Natural Means </li></ul></ul></ul><ul><ul><ul><ul><li>Volcanic Action – depression of volcano becomes filled with water </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Diastrophism – earthquake creates depression and becomes lake basin </li></ul></ul></ul></ul><ul><ul><ul><ul><li>River Action – fallen trees and debris creates a dam; river is clogged and becomes a lake </li></ul></ul></ul></ul><ul><ul><ul><li>Artificial Means </li></ul></ul></ul><ul><li>Lake plain or Swamp – effect due to sediment or decayed vegetation deposition causing the lake to die </li></ul>
  7. 7. Streams <ul><li>Supplied by: </li></ul><ul><ul><li>Run-off water </li></ul></ul><ul><ul><li>Underground water </li></ul></ul><ul><li>Water flows in broad sheets that enter small rills which transport it to a stream </li></ul><ul><li>River – main stream into which tributaries flow </li></ul>
  8. 8. Swamps <ul><li>Basins filled with water , sediments , vegetation </li></ul><ul><li>Peat </li></ul><ul><ul><li>Spongy mass formed from decayed vegetation </li></ul></ul><ul><ul><li>Source of fuel </li></ul></ul><ul><ul><li>Initial stage in Coal Production </li></ul></ul><ul><li>Advantage: Useful to farmers because of fertile soil when they dry up </li></ul><ul><li>Disadvantage: Breeding place for mosquitoes </li></ul>

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