Definition and declaration.
The Convention on Wetlands of International Importance as Waterfowl Habitat or Ramsar Convention was established for the collaborations among countries’ members for the conservation and eradication of the ecological loss of wetland, the promotion of the wise uses of wetlands. The Convention on Wetlands of International Importance as Waterfowl Habitat or Ramsar Convention is effective in December, 1975; currently there are associate members from 160 countries (http://www.ramsar.org/cda/en/ramsar-about-parties-contracting-parties-to-23808 /main/ramsar/1-36-123%5E23 808_4000_0_ ) . Currently, 1,947 Ramsar sites were registered covering 1.90 square kilometer, approximately half of the area is in coastal areas which coral reefs, mangroves, and seagrass beds are included (Anuwat, B.E. 2551).
Wetland means the geographic characteristics of plain, low land, water-saturated area, flooding area, inundated area, swamp, marsh; such areas are whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish, or marine water. Wetland covers the coastal area and sea floor, the depth of which at low tide does not exceed 6 meters.