The present study employs multisensor remote sensing approach for delineating the morphological intricacies of the Banni plain, a hyper arid saline terrain, generally referred to as ‘flat’. The Banni plain is a part of the Great Rann basin and is the culmination of shallow marine sedimentation during the Holocene. Owing to the variable submergence characteristics, the Banni plain displays geomorphological characteristics that are unique and distinctly different from the rest of the terrain of the Great Rann. The RISAT SAR data of the Banni plain used in the present study was acquired in the month of August, 2012, i.e. during the monsoon season when large parts of the Banni plain are normally submerged, waterlogged or saturated with rain water. The inundation is found to be a key factor, in the backscatter of radar waves in the available SAR data which is exploited in the present study to interpret landscape characteristics of the Banni plain. Backscatter from non-inundated sites is relatively high and for areas with water table at the surface is intermediate and inundated areas, it is low. Geomorphological interpretation is done by combining SAR data, LANDSAT ETM + images and Google earth data. The present study concludes that structurally controlled variations in the elevations in different parts of the Banni plain is the prime factor influencing the submergence pattern which in turn controls the moisture distribution and soil type. Since Banni Plain is characterized by very gentle slope and scanty vegetation, we also infer that the variations in the backscattering in the SAR data of the Banni plain are a reflection of the variation of moisture content in soils.
Geomorphic Characterization of the Banni Plain, Kachchh, Using Orbital Imaging Radar (RISAT 1C) and Optical Remote Sensing Data
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The present study employs multisensor remote sensing approach for delineating the morphological intricacies of the Banni plain, a hyper arid saline terrain, generally referred to as ‘flat’. The Banni plain is a part of the Great Rann basin and is the culmination of shallow marine sedimentation during the Holocene. Owing to the variable submergence characteristics, the Banni plain displays geomorphological characteristics that are unique and distinctly different from the rest of the terrain of the Great Rann. The RISAT SAR data of the Banni plain used in the present study was acquired in the month of August, 2012, i.e. during the monsoon season when large parts of the Banni plain are normally submerged, waterlogged or saturated with rain water. The inundation is found to be a key factor, in the backscatter of radar waves in the available SAR data which is exploited in the present study to interpret landscape characteristics of the Banni plain. Backscatter from non-inundated sites is relatively high and for areas with water table at the surface is intermediate and inundated areas, it is low. Geomorphological interpretation is done by combining SAR data, LANDSAT ETM + images and Google earth data. The present study concludes that structurally controlled variations in the elevations in different parts of the Banni plain is the prime factor influencing the submergence pattern which in turn controls the moisture distribution and soil type. Since Banni Plain is characterized by very gentle slope and scanty vegetation, we also infer that the variations in the backscattering in the SAR data of the Banni plain are a reflection of the variation of moisture content in soils.
Publication Mode |
Online |
---|---|
Publication Author |
D. M. Maurya, Mamta Tiwari, A. S. Rajawat, H. Kumar, N. Khonde, L. S. Chamyal |
Publication Language |
English |
Publication Type |
Conference Paper |
Publication Year |
2016 |
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