HOW TO DESCRIBE DRAINAGE IN TOPOGRAPHICAL MAP

HOW TO DESCRIBE DRAINAGE IN TOPOGRAPHICAL MAP




what is drainage

Drainage is the outflow of water through the system of natural rivers

what is drainage pattern?

A drainage pattern is a layout that a river and its tributaries, or set of rivers, make on the earth’s surface. Some of the common river drainage patterns include dendritic river pattern, trellised river pattern, radial river pattern and centripetal river pattern





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The following are hints to follow when you describe drainage in topographical map

  • Divide the map into drainage basins using compass directions. Note that the drainage basin is an area drained by single river system.
  • In each drainage basin explain the drainage pattern which the river system in the basin take. The common river drainage pattern are
  • For each drainage basin explain how the rivers drain the relief region i.e highlands, lowlands and plateaus. at this part state the direction of the flow of the river, where the river is pouring its water and whether the area is well drained or not. The area is well drained when there is no swamps or marshlands and is not well drained when is waterlogged areas.




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mwaikusa

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