CSIR (Council of Scientific & Industrial Research) Earth Sciences Physical Geography-Geomorphology Study Material (Page 35 of 90)

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Geomorphic Cycles: Michael J. Kirkby՚s Model

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Michael J. Kirkby՚s Model

Kirkby slope model is based on a mass balance equation formulated using differential calculus. Following are important aspects of this model:

  • The continuity equation in differential form is the basis for a theoretical analysis of slope development. It is a process-response model, which uses continuity equation based on mass balance:
    • If more material is brought into a slope section than is taken out, then the difference must be represented by aggradation within the section.

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Geomorphic Cycles: S. a. Schumm՚s Episodic Theory of Geomorphic Thresholds

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S. A. Schumm՚s Episodic Theory of Geomorphic Thresholds

Concept of Geomorphic Thresholds

Geomorphic thresholds are defined as the condition at which there is a significant landform change due to either an external or internal influence. They are of two types

  • External Geomorphic Thresholds: External changes like base level, climatic, and tectonic influences result in shifting patterns of erosion and deposition when thresholds are crossed. Progressive change in an external variable can trigger abrupt changes or failure within the affected s…

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