Scholarlink

<p>L-band synthetic aperture radar (SAR) data are considered more effective than optical data for revealing geological lineaments in regions with alluvium and dense vegetation. This effectiveness of SAR data is due to their ability to penetrate both the soil (up to a shallow depth) and the vegetation. The present study aims to identify structural lineaments by processing Advanced Land Observing Satellite—Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) data in the southern part of the West Bengal Basin, India. We employed directional filtering along with false color composites of HH (Horizontal–Horizontal) and HV (Horizontal–Vertical) polarised SAR backscattered data to enhance edge relief and highlight the relict and paleochannel impressions. We identified a total of fifteen major lineaments (100–500&#xa0;km long) showing the dominant trends along NNE-SSW and NW-SE directions in the study area. A proximate analysis allowed us to delineate the more active lineaments among those mapped. Overall visual and statistical comparisons reinforce the prevailing concept that ALOS PALSAR data are more effective than optical data (Landsat 8/9) for mapping subsurface faults and lineaments in areas with thick alluvium and vegetation cover.The findings could offer valuable insights in understanding the structural configuration of West Bengal Basin when analysed in conjunction with subsurface geophysical data.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mapping major lineaments in the southern part of West Bengal Basin, India: an ALOS PALSAR-based approach

  • 期刊论文

  • 发表日期：

    2025年11月17日

查看全文
  • Pranab Das,
  • Santosh Garain,
  • Debashis Mitra

摘要

L-band synthetic aperture radar (SAR) data are considered more effective than optical data for revealing geological lineaments in regions with alluvium and dense vegetation. This effectiveness of SAR data is due to their ability to penetrate both the soil (up to a shallow depth) and the vegetation. The present study aims to identify structural lineaments by processing Advanced Land Observing Satellite—Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) data in the southern part of the West Bengal Basin, India. We employed directional filtering along with false color composites of HH (Horizontal–Horizontal) and HV (Horizontal–Vertical) polarised SAR backscattered data to enhance edge relief and highlight the relict and paleochannel impressions. We identified a total of fifteen major lineaments (100–500 km long) showing the dominant trends along NNE-SSW and NW-SE directions in the study area. A proximate analysis allowed us to delineate the more active lineaments among those mapped. Overall visual and statistical comparisons reinforce the prevailing concept that ALOS PALSAR data are more effective than optical data (Landsat 8/9) for mapping subsurface faults and lineaments in areas with thick alluvium and vegetation cover.The findings could offer valuable insights in understanding the structural configuration of West Bengal Basin when analysed in conjunction with subsurface geophysical data.