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Geophysical Control on the Channel Pattern Adjustment in the Kunur River Basin of Western Part of Lower Ganga Basin

  • Suvendu RoyEmail author
  • Subhankar Bera
Chapter
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Part of the Geography of the Physical Environment book series (GEOPHY)

Abstract

Surface gravity anomaly is important to know the underlying rock density and basement structure since they are playing dominant role in the channel pattern adjustment. Over the Western Bengal Basin (WBB), EW-tending and NS-tending garbens are actively controlled the gravity anomaly and adjacent variation in basement structure and lithology. The streamlines of Kunur River Basin (KRB) and rivers in surrounding are sharply controlled by the variation in underlying rock density, alignment of the lineaments and subsurface faults. Medinipur–Farakka Fault (MFF) and Garhmayna–Khandaghosh Fault (GKF) lines make prominent deformation in longitudinal profile, planform index, channel geometry and other fluvial forms of Kunur River. High Transverse Topographic Symmetry Factor (TTSF) values (>0.40) around the fault lines and high Drainage Basin Asymmetry (AF-index) values (64.40) also positively reveal the neotectonic sensitivity over the basin.

Keywords

Channel pattern Bouguer gravity anomaly MFF line TTSF AF-Index Neotectonic 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of GeographyKalipada Ghosh Tarai MahavidyalayaDarjeelingIndia
  2. 2.Department of GeographyUniversity of KalyaniKalyani, NadiaIndia

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