IAS (Admin.) Mains Geography Geomorphology-Slope Development Study Material (Page 1 of 5)

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Slope Development: Elements of Hill Slope Profile (a. Wood)

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Slope is angular inclination of terrain between hilltops (crests) and valley bottoms resulting from combination of factors like geological structure, climate, vegetation, drainage, dissection index, relative relief etc. Slope angle determines whether it is a hill slope or a valley slope. Inclined surface implies a slope profile of either a hill or a valley. Slopes are open dynamic systems where regolith (unconsolidated ground material) and near-surface …

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Slope Development: 9-Unit Slope Model

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9-Unit Slope Model

Dalrymple in 1968 gave the 9-unit slope model with following components:

Slope elements by Dalrymple

Illustration 1 for 9-Unit Slope Model
  • Interfluve: It is the divide area characterized by vertical subsurface water and soil movement. This region is dominated by vertical soil formation.
  • Seepage Slope: This area is characterized by gentle dip with downward percolation. This region is dominated by mechanical and chemical eluviation by lateral and vertical transport processes due to subsurface flow.
  • Convex Creep Slope: It is the upper convex zone characterized by creep and terrace…

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