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GIS Based Morphometric Analysis of Gagadio River Watershed of Shetrunji Basin

Author(s):

Jaydeep R. Ardeshna , Shantilal Shah Govt. Engineering College, Bhavnagar; Prof. H. M. Gandhi, Shantilal Shah Govt. Engineering College, Bhavnagar; Dr. N. J. Shrimali, Faculty of technology, M. S. University, Vadodara; Prof. Y. P. Pathak, Govt. Engineering College, Bhavnagar

Keywords:

GIS, morphometric, geo-hydrological, erodibility

Abstract

The watershed is a geo-hydrological area on which the precipitation occurs and drains towards the common outlet and there is a harmony among the soil, water, land-use and geomorphology. So it’s more significant to take the watershed as a development unit. The morphometric characteristics are commonly used to develop regional hydrological models particularly in the case of unguaged catchment. The morphometric analysis is carried out for Gagadio watershed having 521.55km2 area located in Amreli district of Gujarat. Gagadio river is a major left bank tributary of Shetrunji river. Using GIS techniques, the basic parameters (basin area, basin perimeter, basin length, total number and length of streams of each order), linear parameters (bifurcation ratio, drainage density, stream frequency, texture ratio, length of overland flow) and shape parameters (form factor, shape factor, elongation ratio, circulatory ratio, compactness coefficient) are calculated. Gagadio watershed is of 6thorder and it has parallel drainage pattern. Mean bifurcation ratio (4.02) indicates geologically controlled drainage pattern. Drainage density (2.04) and stream frequency (1.86) are moderate. Texture ratio (4.11) indicates moderate drainage texture and length of overland flow is 1.02. The shape parameters indicate elongated shape of watershed & correspondingly low peak discharges and less erodibility.

Other Details

Paper ID: IJSRDV3I2916
Published in: Volume : 3, Issue : 2
Publication Date: 01/05/2015
Page(s): 1675-1678

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