Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Remote Sensing and GIS Based Comparative Morphometric Study of Two Sub-Watershed of Different Physiographic Conditions, West Godavari District, A.P.


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1 CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, India
     

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In this present study, Remote Sensing (RS) and Geographical Information System (GIS) techniques were used to update drainage and surface water bodies and to evaluate linear, relief and aerial morphometric parameters of the two sub-watersheds viz. Jilugumilli and Regulapadu in the northern part of West Godavari District, Andhra Pradesh. The area of Jilugumilli and Regulapadu watersheds spread over about 110 & 80 sq. km respectively. The morphometric analysis of the drainage networks of Regulapadu and Jilugumilli sub-watersheds exhibit sub-dendritic and sub parallel drainage pattern. The variation in stream length ratio changes due to change in slope and topography. It was inferred from the study that the streams are in a mature stage in Regulapadu and Jilugumilli watersheds, which indicated the geomorphic development. The variations in bifurcation ratio values among the sub-watersheds are described with respect to topography and geometric development. The stream frequencies for both sub-watersheds exhibit positive correlation with the drainage density, indicating increase in stream population with respect to increase in drainage density. The Jilugumilli watershed has a coarse drainage texture and Regulapadu sub-watershed is a fine drainage texture in nature. In the present study an attempt has been made to analyse the morphometric analysis of two sub-watersheds under different physiographic conditions. Morphometric analysis is one of the essential analyses required for development and management of watershed.

Keywords

Remote Sensing (RS), Geographical Information System (GIS), Watershed and Morphometric Analysis.
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  • Remote Sensing and GIS Based Comparative Morphometric Study of Two Sub-Watershed of Different Physiographic Conditions, West Godavari District, A.P.

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Authors

G. Tamma Rao
CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, India
V. V. S. Gurunadha Rao
CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, India
Ratnakar Dakate
CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, India
S. T. Mallikharjuna Rao
CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, India
B. M. Raja Rao
CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, India

Abstract


In this present study, Remote Sensing (RS) and Geographical Information System (GIS) techniques were used to update drainage and surface water bodies and to evaluate linear, relief and aerial morphometric parameters of the two sub-watersheds viz. Jilugumilli and Regulapadu in the northern part of West Godavari District, Andhra Pradesh. The area of Jilugumilli and Regulapadu watersheds spread over about 110 & 80 sq. km respectively. The morphometric analysis of the drainage networks of Regulapadu and Jilugumilli sub-watersheds exhibit sub-dendritic and sub parallel drainage pattern. The variation in stream length ratio changes due to change in slope and topography. It was inferred from the study that the streams are in a mature stage in Regulapadu and Jilugumilli watersheds, which indicated the geomorphic development. The variations in bifurcation ratio values among the sub-watersheds are described with respect to topography and geometric development. The stream frequencies for both sub-watersheds exhibit positive correlation with the drainage density, indicating increase in stream population with respect to increase in drainage density. The Jilugumilli watershed has a coarse drainage texture and Regulapadu sub-watershed is a fine drainage texture in nature. In the present study an attempt has been made to analyse the morphometric analysis of two sub-watersheds under different physiographic conditions. Morphometric analysis is one of the essential analyses required for development and management of watershed.

Keywords


Remote Sensing (RS), Geographical Information System (GIS), Watershed and Morphometric Analysis.

References