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Singh, Umesh K.
- Qualitative Study of Coast Effect on MV and MT Measurements in Western Coast of India
Abstract Views :161 |
PDF Views:2
Authors
Affiliations
1 National Hydrographic Office, Rajpur Road, Dehra Dun - 248 001, IN
2 Department of Civil Engineering, Indian Institute of Technology, Kanpur- 208 016, IN
1 National Hydrographic Office, Rajpur Road, Dehra Dun - 248 001, IN
2 Department of Civil Engineering, Indian Institute of Technology, Kanpur- 208 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 63, No 1 (2004), Pagination: 88-94Abstract
Magneto-variational (MV) and Magnetotelluric (MT) methods use natural geomagnetic fields which have been found to be affected by the ocean worldwide. During last decade, MV and MT studies have been carried out in the western part of India. In the present paper, two-dimensional modelling has been carried out to investigate the coast effect on MV and MT data observed near the coast. Varying coastal and continental layer parameters of the western part of the Deccan trap region have been taken to examine the coast effect. The MV and MT data are found to be affected by the coast up to 300 km.Keywords
Magneto-Variational Method, Magnetotellurics, Coast Effects, West Coast of India.
- Formulation for Critical Shear Stress of Cohesive Sediment Mixture
Abstract Views :245 |
PDF Views:76
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, IN
2 Department of Civil Engineering, Jaypee University of Information Technology, Waknaghat, Solan 173 234, IN
1 Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, IN
2 Department of Civil Engineering, Jaypee University of Information Technology, Waknaghat, Solan 173 234, IN
Source
Current Science, Vol 113, No 11 (2017), Pagination: 2105-2111Abstract
This article describes results of an experimental study on incipient motion of gravel particles present in the cohesive mixtures, i.e. clay–silt–gravel and clay–silt–sand–gravel, in which the percentage of clay varied from 10% to 50% on weight basis. Incipient motion condition is visually and quantitatively identified which responds to sheet and line erosion type appearance on the top surface of the channel bed for clay up to 30% and mass erosion pattern for 40% and 50% of clay. The clay percentage, weighted geometric standard deviation and bulk density of the cohesive sediment mixture are found to be the main parameters that affect the incipient motion of gravel particles. A functional relationship is proposed to determine critical shear stress of gravel particles present in cohesive sediment mixtures. The regression analyses as well as goodness of fit test were conducted for the proposed relationships which were found to be in good agreement with the present data.Keywords
Clay Content, Cohesive Sediment Mixture, Critical Shear Stress, Incipient Motion, Sediment Transport.Full Text
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