V. Jha

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Jayjit Majumdar

University of Kalyani

Armando Marques-Guedes

UNL - New University of Lisbon

Rajendra Shrestha

Asian Institute of Technology (AIT)

Louis Addae-Wireko

Kwame Nkrumah University of Science and Technology

Peter D Clift

University College London

Ehsan Erfani

Desert Research Institute

Jeganathan CHOCKALINGAM

Birla Institute of Technology, Mesra (Ranchi) India

Dr Prem Pandey

Banaras Hindu University, Varanasi

Reinaldo Imbrozio Barbosa

Instituto Nacional de Pesquisas da Amazônia

Jonathan Quaye-Ballard

Kwame Nkrumah University of Science and Technology

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Morphometric analysis of Nandakini River Basin, Garhwal Himalaya, Uttarakhand using geospatial technology

by Sucheta Mukherjee and V. Jha

National Geographical Journal of India

Basin morphometry is a crucial method of analysis to understand the geology, lithological structu... more Basin morphometry is a crucial method of analysis to understand the geology, lithological structure, infiltration rate of rainwater, runoff, eroded load carrying capacity and flooding potential of a drainage basin. The quantitative techniques applied for linear, aerial and relief aspects of the drainage basin elucidate the rate of erosion, the intensity of denudation and subsequently the potential of the Nandakini river basin to flooding. The morphometric analysis of the Nandakini river basin in the Garwhal Himalayan region of Uttarakhand reveals that the Rf value of the Nandakini river basin is 0.28, indicating an elongated basin shape leading to quick flooding and poor draining out of floodwaters. Similarly, an elevation difference between the highest and lowest elevation is 5380 metres aids quick runoff and deposition of eroded debris in the drainage channels, another cause of channel overflow. The Rh value is high (0.12), indicating a high channel gradient with intense erosional...

Morphometric analysis of Nandakini River Basin, Garhwal Himalaya, Uttarakhand using geospatial technology

National Geographical Journal of India, 2021

DENUDATIONAL PROCESSES AND GEOMORPHIC CHARACTERISTICS OF THE KALIANI RIVER BASIN (ASSAM, INDIA

by V. Jha and Sucheta Mukherjee

Denudation relates to the removal of loosened material from a rock surface. This is carried out b... more Denudation relates to the removal of loosened material from a rock surface. This is carried out by wind or running water and exposes the underlying rock to further disintegration through the agents of erosion. Denudation is an external process and includes processes such as weathering, mass movement, transportation and erosion. In the long term, it ultimately leads to lowering of relief of the particular region were it is operating. Denudation is initiated by climatic factors and leads to specific geomorphic features in particular climatic regions. Thus the landform features formed in arid regions will differ from those in a humid region on a macro scale. However, some features may be common or almost similar to both regions on a micro scale e.g., mesa like features are common in some fluvial eroded landscapes as well as long as there are alternate bands of softer and harder rocks. Both endogenetic as well as exogenetic processes have played a crucial role in the character of landforms in the study area. The Kaliani River Basin (Diphu subdivision), Karbi Anglong district in Assam has been selected for identifying and studying the regions which are affected by denudation and the simultaneous geomorphic features formed. The basin is the result of past tectonic activity which has resulted in folding and faulting. Volcanic activity in the region has been known to occur in post Cretaceous times. The denudation processes in operation have imparted a unique geomorphic characteristic to the region giving it uneven and inaccessible terrain in some parts. The study area forms a part of the Karbi Anglong plateau comprising of a Precambrian platform. This feature has been significantly dissected and graded. An attempt has been made to study the geomorphic characteristics as a result of the denudational processes operating within the study area.

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Morphometric analysis of Nandakini River Basin, Garhwal Himalaya, Uttarakhand using geospatial technology

by Sucheta Mukherjee and V. Jha

National Geographical Journal of India

Morphometric analysis of Nandakini River Basin, Garhwal Himalaya, Uttarakhand using geospatial technology

National Geographical Journal of India, 2021

DENUDATIONAL PROCESSES AND GEOMORPHIC CHARACTERISTICS OF THE KALIANI RIVER BASIN (ASSAM, INDIA

by V. Jha and Sucheta Mukherjee

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