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Mandal, D.
- Effect of Body Forces on the Propagation of Love Wave in a semi-infinite Orthotropic Medium
Abstract Views :764 |
PDF Views:0
Authors
Affiliations
1 Department of Applied Mathematics, Indian School of Mines, Dhanbad-826004, IN
1 Department of Applied Mathematics, Indian School of Mines, Dhanbad-826004, IN
Source
Research Journal of Science and Technology, Vol 5, No 1 (2013), Pagination: 216-219Abstract
The effect of time dependent body forces on the propagation of Love wave motion in an orthotropic elastic half space is considered in this paper. The surface displacement component is obtained in a closed form for special type of crystals. Numerical results are obtained for a particular case of time dependent body force at different distances from the source for the different values of the non-dimensional time. The results are shown graphically.Keywords
Body Forces, Love Wave, Orthotropic Media, Cagniard de-Hoop Technique.
References
- Abd-Alla, A.M. and Ahmed, S.M.: Propagation of Love waves in a non-homogeneous orthotropic elastic layer under initial stress overlying semi-infinite medium. Appl. Math. Comp. 106 (2-3), 265-275 (1999)
- Borcherdt, R. D.: Reflection and refraction of type-II S-waves in elastic and anelastic media. Bull. Seism. Soc. Am. 67, 43-67 (1977)
- Cagniard, L.: Reflection et refraction des ondes seismiques progressive, Paris: Gauthier-villars (1939)
- Garvin, W. W.: Exact transient solution of the Buried line source problem. Proceeding of Royal Society London A, 234, 1199, 528- 541 (1956)
- Hearn, D. J. and Krebes, E. S.: Complex rays applied to wave propagation in a viscoelastic medium. Pageoph 132, 401-415 (1990a)
- Hearn, D. J. and Krebes, E. S.: On computing ray-synthetic seismograms for anelastic media using complex rays. Geophysics 55, 422-432 (1990b)
- Krebes, E. S. and Hron, F.: Ray-synthetic seismograms for SH waves in anelastic media. Bull. Seism. Soc. Am. 70, 29-46 (1980a)
- Krebes, E. S. and Hron, F.: Synthetic seismograms for SH waves in layered anelastic media by asymptotic ray theory. Bull. Seism. Soc. Am. 70, 2005-2020 (1980b)
- Le, L.H.T., Krebes, E.S. and Quiroga-Goode, G.E.: Synthetic seismograms for SH waves in anelastic transversely isotropic media, Geophys. J. Int. 116, 598-604 (1994)
- Liu, K. and Liu, Y.: Propagation of characteristic of Rayleigh waves in orthotropic fluid-saturated porous media. J. Sound Vib. 271 (1-2), 1-13 (2004)
- Maiti, N. C. and Mitra, M.: Wave propagation from extended, asymmetric surface sources in an elastic half-space. Bull. Seism. Soc. Am. 69 (3), 713-735 (1979)
- Rangelov, T.V., Manolis, G.D. and Dineva, P.S.: Wave Propagation in a restricted class of orthotropic inhomogeneous half-planes. Acta Mech. 210, 169-182 (2010)
- Permissible Soil Loss Limits for Different Physiographic Regions of West Bengal
Abstract Views :315 |
PDF Views:89
Authors
Affiliations
1 Central Soil and Water Conservation Research and Training Institute, Research Centre, Sunabeda 763 002, IN
2 Central Soil and Water Conservation Research and Training Institute, 218, Kaulagarh Road, Dehradun 248 195, IN
3 Water Technology Centre, Indian Agricultural Research Institute, New Delhi 110 012, IN
1 Central Soil and Water Conservation Research and Training Institute, Research Centre, Sunabeda 763 002, IN
2 Central Soil and Water Conservation Research and Training Institute, 218, Kaulagarh Road, Dehradun 248 195, IN
3 Water Technology Centre, Indian Agricultural Research Institute, New Delhi 110 012, IN
Source
Current Science, Vol 107, No 4 (2014), Pagination: 665-670Abstract
Land degradation due to water erosion is a major impediment for optimum land productivity in West Bengal (WB). Sustainable development of the state needs appropriate land-use planning taking into account the heterogeneity in soil and land resources. In this study, the maximum permissible soil loss rates (T values) were computed for 115 mapping units of WB by integrating the most sensitive soil indicators such as infiltration rate, bulk density, water stable aggregates, organic carbon and fertility status to assess soil quality governing soil resistibility to erosion. For each mapping unit, indicator soil attribute values were quantitatively expressed in the 0 to 1 scale and an aggregate score was computed from the attribute scores and the corresponding weights. The results suggested a wide difference in the T values among the regions and mapping units, with values ranging from 2.5 to 12.5 Mg ha-1 yr-1. In the state as a whole, about 88% of the area has 'T' value of 12.5 Mg ha-1 yr-1. The relatively plain lands in the Indo-Gangetic plain, coastal and delta plain and the Bengal basin have a higher soil loss tolerance of about 4.0 Mg ha-1 yr-1 than the hilly and undulating regions in the Eastern Himalaya and Eastern plateau regions. The information generated will serve as a useful guide for devising differential conservation and resource use plans on the basis of soil resource potential.Keywords
Biophysical Model, Physiographic Regions, Soil Erosion, Soil Conservation Planning.Full Text
- Watershed-Scale Runoff-Erosion-Carbon Flux Dynamics: Current Scope and Future Direction of Research
Abstract Views :255 |
PDF Views:92
Authors
S. Patra
1,
D. Mandal
1,
P. K. Mishra
1,
P. R. Ojasvi
1,
G. Kumar
1,
R. Kaushal
1,
N. M. Alam
1,
P. K. Mishra
2,
J. P. Patra
2
Affiliations
1 ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 195, IN
2 National Institute of Hydrology, Roorkee, IN
1 ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 195, IN
2 National Institute of Hydrology, Roorkee, IN
Source
Current Science, Vol 109, No 10 (2015), Pagination: 1773-1774Abstract
No Abstract.Full Text