Archive for March 18, 2009

Facts and figures about wetlands

Under the text of the Ramsar Convention, wetlands are defined as: ‘areas of marsh, fen, peatland or water, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish or salt, including areas of marine water the depth of which at low tide does not exceed six metres’.

wetlands

The Convention on Wetlands is an intergovernmental treaty adopted on 2 February 1971 in the Iranian city of Ramsar. Thus, though nowadays the name of the Convention is usually written ‘Convention on Wetlands (Ramsar, Iran, 1971)’, it has come to be known as the ‘Ramsar Convention’. The original emphasis of the Convention was on the conservation and wise use of wetlands with the primary goal of providing habitats for waterbirds. Over the years, however, the Convention has broadened its scope to cover all aspects of wetland conservation and wise use, recognizing wetlands as ecosystems that are extremely important for biodiversity conservation in general and for the well-being of human communities.
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Facts and figures about water: Vector of change and exchange

The navigation of rivers, lakes and oceans began before recorded history. Navigation, due to its relationship and importance to transportation, has played a leading part in the advancement of civilization. Men learned early that travel by water was a convenient means of transporting their goods of trade to other lands.

The first crafts were probably kinds of canoes that were cut out from tree trunks and propelled with short oars. During the Stone Age, these embarkations were made by cutting down a tree and hollowing its trunk. Later, they were covered with impermeable fabrics before being constructed from tied or sewed wooden plates. Soon it was discovered that if sails were attached to the ships, they would harness wind-power and the ships would go faster. Early sails were probably made of interwoven rushes or leather.
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