Atmospheric warming induced changes in future rainfall and implications on water and agriculture in India

The projected rainfall change under various scenarios is likely to have both positive and negative implications on agriculture and water supply because in rainfall pattern across the country. Rise in rainfall is seen over all states except Punjab, Rajasthan and Tamil Nadu, which show slight decrease in precipitation in the future scenarios. Marked increase in covering the Western Ghats and northwestern peninsular India including Maharastra and the adjoining parts of Andrapradesh, Madhyapradesh and Karnataka. The annual maximum peak in the sub basin of Mahanadi has exceeded from the present level of about 20000 cumecs under control scenario to a maximum level of 37000 cumecs under Green House Gas (GHG) scenario, such an increase in flood peak may be detrimental to a large number of existing structures on these drainage system. The number of drought weeks has considerably increased during GHG scenario barring about five sub basins out of the 21-sub basins of Krishna.
 
REFERENCES
Alcamo, J., Doll, P., Kaspar, F., Siebert, S. (1997) Global change and global scenario of water use and applicability: An application of water GAP 1.0. model, University of Kassel, Kassel, Germany.
Allen, M.R., Ingram, W.J. (2002) Constraints of future change of climate and the hydrological cycle. Nature 418: 224-232.
Arnell, N.W., Liu, C., Compacnucci, R., da Cunha, L., Hanaki, K., Howe, C., Mailu, G., Shiklomanov, I., Stakhiv, E. (2001) Hydrology and Water resources. In: McCarthy, J.J., Canziani, O.F., Leary N.A., Dokken, D. J., White, K.S. (Eds.).
Arnold, J. G., Williams, J.R., Nics, A. and Sammons, N. B. (1990) SWRRB- A basin scale simulation Model for Soil and Water Management, Internal Report. Texas A&M Press, College Station,  255 p.
CGWB (1995) Ground Water Resources of India (CGWB). Central Groundwater Board, New Delhi. Datta, P.S. (2006) Ground water ethics for its sustainability. Curr. Sci. 89: 812- 817.
Gosain, A.K., Sandhya Rao and Debajit Basuray. (2003) Assessment of vulnerability and adaptation for water sector. Proceedings of the workshop on vulnerability assess-ment and adaptation due to climate change on Indian water resources, coastal zones and human health. Ministry of Environment and Forests, New Delhi, 17-24.
Hansen, J. and Sato, M. (2004) Greenhouse gas growth rates. Proc. Natl Aca. Sci. 101(46): 16109-16114.
Houghton, J. T., Ding, Y., Griggs, M., Noguer, P.J, Van der Linden, Dai, X., Maskell, K. and Johnson, C.A. (2001) Climate Change: The Scientific Basis. Contribution of Working Group 1 to the Third Assessment Report on the Intergovernmental Panel on Climate Change. Cambridge University Press, pp. 881.
Huntington, T. G. (2006). Evidence for intensification of the global water cycle: Review and synthesis. J. Hydrol. 319: 83- 95.
IPCC Climate Change (2001) Impacts, Adaptation &Vulnerability, The Third Assessment Report of Working Group 11 of the Intergovernmental Panel on Climate Change (IPCC), 1000. Cambridge University Press, Cambridge, UK, pp. 133-191.
Intergovernmental Panel on Climate Change (IPCC) (2001) Climate Change, The science of climate of change, Assessment report of IPCC working group 1 (eds.) Houghton, J. T., Ding, Y., Griggs, M., Noguer, P.J, van der linden, Dai, X., Maskell, K. and Johnson, C.A. and WMP/UNEP), Cambridge University Press, Cambridge.
Kumar, R., Singh, R.D and Sharma, K.D. (2005). Water resources of India. Curr. Sci 89(5): 794-811.
Mall, R. K., Akhilesh Gupta, Ranjeet Singh, Singh, R. S. and Rathore L. S. (2006) Water resources and climate change: An Indian perspective. Curr. Sci., 90: 1610-1625.
Mooley, D.A., Parthasarathy, B., Sontakke, N.A and Munot, A.A. (1981). Annual rain-water over India, its variability and impact on the economy. J. Climatology 1:167-186.
Murugan, M, Miniraj, N., Josephrajkumar , A., Pradeep, K.P and Yusuf, L. (2003) Analysis and forecast of winter monsoon by pre Vedic and simulation model in Tamil Nadu. J. Asian Agri History 7(3): 219-231.
Murugan, M., Josephrajkumar, A., Sainamolekurian, P., Ambikadevi, D., Vasanthkumar, K. and Shetty, P.K. (2006). Critiques on the critical issues of cardamom cultivation in Cardomom hill reserves, Kerala, India. Indian Journal of Arecanut, Spices & Medicinal Plants. (In press).
 Murugan, Shetty and Hiremath 141 Integrated Water Resources Management. (1999). A plan for action, Repot of the National Commission for Integrated Water Resources Development, Ministry of Water Resources (MWRI), New Delhi.
National Centre for Integrated Water Development. (1999) Repot submitted for the Ministry of Water Resources, New Delhi.
Ramesh, R., Yadava, M.G. (2005) Climate and water resources in India. Curr. Sci 89(5): 818-824.
Ravindranath, N. H., Joshi, N. V., Sukumar, R. and Saxena, A. (2006) Impact of climate change on forest in India. Curr. Sci 90: 354-361.
Raju, K.C.B. (2006) An overview of the water resources and how important is the ground water resource for the development of the country and the role of geoscientist in making it a sustainable resource. Journal of Geological Society of India 67: 407-413.
Rupa Kumar, K., Sahai, A.K., Krishnakumar, K., Patwardhan, S.K., Mishra, P. K., Revadekar, J. V., Kamala, K. and Pant, G.B. (2006) High-resolution climate change scenarios for India for the 21st century. Curr. Sci. 90: 334-345.
 UN (1998) Annual population (1950-2050), The 1998 Revision, United Nations, New York.
Vorosmarty, C.J., Sahagian, D. (2000). Anthropogenic disturbance of the terrestrial water cycle. Bioscience 50: 753-765.
Wetherald, R.T., Manabe, S. (2002). Simulation of hydrologic changes associated with global warming (DOI). Journal of Geophysical. Research 107: 4379-4393.