Morphometric Analysis of Areal Aspects of Western Doon of Dehra, Uttrakhand (India)

Authors: Tajvir

Country: India

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Abstract: The morphometric study of areal aspects of a geomorphic unit is very significant. This type of study through light on various drainage basin characteristics - like dissection of the area, intensity of erosion, sedimentation, length of overland flow, runoff etc. Characteristics of rocks can also be assessed by examination of the areal aspects of drainage basin. The study area, the Western Doon of Dehra is an important small geomorphic unit from the perspective of cultural and natural landscape. In fact, Dehradun which is the capital city of Uttarakhand is a part of this area. So, the conservation of cultural and natural landscape also becomes important for this unit. Keeping in view the importance of this unit for mankind, the present study has been carried out. Database of areal analysis of Doon is the Topographical Sheets published by Government of India. Study of drainage density reveals that scarp faces of the study area are under intense erosion. Low to moderate drainage density and drainage frequency indicates that a large portion of study area is plain and also suggests late mature stage of landform development in the region. It has been investigated that the crest area of Tons watershed has medium drainage frequency, which indicates that crest areas of Tons are comparatively flat topped. Upper reaches of Surna watershed, Sitla watershed and Siwaliks have high drainage density and drainage frequency, so flooding is most likely to occur in the upper area of these channels during the heavy rain. All the three shape indicators conclude that all the 5th and 6th order drainage basins are elongated in shape. The elongated shapes can help in minimizing the flood losses, when heavy rainfall occurs in peaks. The elongation values also suggest that the landforms are in a mature stage of development. Differences in these values among different similar order basins suggest the control of slope, geology and structure in the development of streams.

Keywords: Dehra, Doon, Drainage, Elongation

Paper Id: 230340

Published On: 2022-07-15

Published In: Volume 10, Issue 4, July-August 2022

Cite This: Morphometric Analysis of Areal Aspects of Western Doon of Dehra, Uttrakhand (India) - Tajvir - IJIRMPS Volume 10, Issue 4, July-August 2022.

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