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

P. T. Hanamgond ¹, V. C. Chavadi ²

Affiliations
1 Department of Geology, G.S. Science College, Belgaum-59000, IN
2 Department of Studies in Geology, Karnatak University, Dharwad-580 003, IN

Abstract

Granulometric studies of 317 sediment samples collected at different micro-environments were used to understand the depositional environment and their spatial (cross-shore and longshore) and temporal (seasonal) grain size variations. The study involves EOF analysis to understand the size distributions at each of the micro-environments through different seasons. With the help of the available textural tools sediment movement and high energy areas have been distinguished.

Keywords

Sedimentology, Beach, West Coast, Karnataka.

Full Text

     

V. S. Hegde ¹, B. K. Koti ², P. T. Hanamgond ³, G. Shalini ¹, K. H. Girish ¹

Affiliations
1 S.D.M. College of Engineering and Technology, Dharwad - 580 002, IN
2 K.L.E. College of Engineering and Technology, Belgaum-6, IN
3 G.S.S. College of Tilakwadi, Belgaum - 6, IN

Abstract

Beach sediments of Pavinkurve and Kasarkod, located adjacent to the Sharavati River mouth at Honnavar, Central West Coast of India are medium to fine grained (1.21 - 2.30Φ) and moderate to well sorted (0.17-0.55). The convergence of long-shore circulation and interaction of river and wave processes are the main influence for the distribution of sediments along these beaches. The sediment transport land-ward during fair weather season (pre-monsoon) is mainly due to westerly wave approach. The re-suspension of sediments owing to agitation of sea during westerly wave approach, their land-ward movement during high tide, and the obstruction caused by the submerged bar formation during falling tide leading to their deposition are the main causes for siltation in the river mouth.

Keywords

Depositional environment, Longshore current, Estuarine beach, Texture, West Coast of India.

Full Text