Davis Cycle Of Erosion UPSC

CYCLE OF EROSION

Cycle of erosion
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Cycle of erosion given by American Geo-morphologist WM Davis in 1883. His observation was based on drainage of Pennsylvania. Davis postulated that a mountain raised from a geo-syncline which undergoes subduction. He postulated fluvial cycle of erosion. Davis proposed the concept of TRIO. TRIO stand for structure process and stage. Babies also postulated that as a land of lift above the sea level it is called pre youthful stage which does not undergo denudation. 

Division Model Of Cycle of Erosion

Division Model Of Cycle of Erosion
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Division model of cycle of erosion have three stages that is called youthful, mature and old stage. 

Youthful Stage

  • River depend their value by hard-ward erosion
  • Drainage will expanded
  • Regional landscape dissected
  • V shaped Valley develop
  • In the last of useful stage river are widened and relative relief increased
  • Lakes in in original depressions venish
  • Waterfall Venish

Mature Stage

  • Longitudinal slope decrease meanders formed
  • Denotation and loading of interfluves
  • Lateral erosion of Valley
  • Lakes and waterfalls completely Venish
  • Sharp edges water devides vanish
  • High drainage density
  • In pre mature stage relative relief is maximum
  • In post mature stage relative relief decreases
  • Convex and free face slope disappear
  • Rectilinear and gentle slope developed
  • Meander and floodplains Plains develop
  • Water bodies take form of circular region having convex slopes
  • Drainage system adjust with structure

Old Stage

  • Floodplain widened
  • Covers with extensive Alluvial deposit
  • River flows slow
  • Water divides are reduced to to monadnock ( Made-up with hard rock) 
  • Bluff formed
  • Level land called peneplain

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