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Complexity in hydro-seismicity of the Koyna?Warna region, India(Natural Hazards)
(D.V. Ramana, J. Pavan Kumar, Asha Chelani, R.K. Chadha, M. Shekar, R.N. Singh,77,S109–S1 ,,Year : 2014)
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Koyna–Warna region in western India is known to be the largest case of the reservoir-triggered seismicity in the world with M6.3 earthquake in 1967. This region continues to be seismically active even after 45 years with occurrences of earthquakes up to M5.0. The porous crustal rocks of Koyna–Warna region respond to changes in the prevailing stress/strain regime. This crustal section is highly fractured and is being fed by rivers and reservoirs. It is also subjected to fluctuating plate boundary forces and significant gravity-induced stresses due to crustal inhomogeneities. These changes induce variations in the water level in bore wells before, during and after an earthquake, and their study can help in understanding the earthquake genesis in the region. The ongoing seismicity thus requires understanding of coupled hydrological and tectonic processes in the region. Water table fluctuations are a reflection of the ongoing hydro-tectonics of the region. The fractal dimension of water levels in the bore wells of the region can be used as measure of the nonlinear characteristics of porous rock, revealing the underlying complexity. In this paper, we present values of correlation dimensions of the water level data in the bore wells using the nonlinear time series methodology. The spatiotemporal changes in the fractal dimensions have also been determined. The results show that hydro-seismically the region behaves as a low-dimensional nonlinear dynamical system
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Loss of Biodiversity and Conservation Strategies: An Outlook of Indian Scenario(Conservation Biology)
(Anil, M. N. V., Kumari, K. & Wate, S. R.,32,,105-114,Year : 2014)
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This article provides a brief overview of the recent loss of biodiversity in India. By reviewing the current status of biodiversity in India, areas which need serious attention can be enumerated. There is an urgent need to monitor loss of biodiversity by analysing the situations which lead to extinction of species. It was observed in numerous case studies that major catastrophe’s occurring in develop-ing nations was attributed to loss of biodiversity. All these emphasize for a paradigm shift in the way we approach to tackle the problem. This article tries to focus on the causes which lead to loss of bio-diversity in India. This was achieved by collecting all case studies and reports from scientific jour-nals. A challenge remains, however, in using this information to provide acceptable solutions for ef-fective conservation methods. This review will outline the biodiversity loss in India by classifying data into different categories and provides an overall picture for Indian scenario. In addition, whilst not being a comprehensive review of all the biodiversity loss in India, a number of birds, fauna and flora are included in the review. Conservation strategies adopted so far in India and strategies which have been proposed are discussed at the end
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