Irrigation has helped in increasing food production and achieving food security in India. However, climate change is expected to affect the crop production in irrigated area particularly in groundwater irrigated areas. This study was undertaken for suggesting strategies to climate change impact on irrigated crops based on projected change in crop water requirement and groundwater availability for irrigation in the National Capital Territory of Delhi. Prevailing groundwater recharge in the study area during monsoon was 4.01 MCM (Million cubic meter). The same for various scenarios varied from -15.47 MCM to 5.08 MCM. It was revealed that groundwater recharge would increase if it is estimated based on the climate prediction done using local weather data. The impact of climate change on groundwater availability is evident in scenarios based on INCCA and IPCC predictions where it varied from -2.66 MCM to 1.02 MCM. Contrary to common perceptions, crop water requirement of prevailing cropping system would not increase in future if all the important climatic parameters are considered for its prediction. This may be due to the fact that effect of increase in temperature on crop water requirement may be compensated by decrease in other climatic parameters such wind speed and duration of daily sunshine hours. Results indicated that climate change may not have much impact on sustainability of prevailing cropping system as per the crop water requirement is concerned. Based on water requirement and groundwater availability under various climate change scenarios, appropriate strategies to cope up the climate change impact on irrigated crops have been suggested.
Coping strategies, Crop water requirement, Cropping system, Groundwater availability
De Silva, C.S., Weatherhead, E.K. and Knox, J.W. (2007). Predicting the impacts of climate change-a case study on paddy irrigation water requirements in Sri Lanka. Agric. Water Manage. 93(12), 19–29.
Doll, P. (2002). Impact of climate change and variability on irrigation requirements: a global perspective. Clim. Chang. 54, 269–293.
Doria, R.O. and Madramootoo, C.A. (2009). Estimation of irrigation requirements for some crops in southern Quebec using CROPWAT. Irrig. and Drain.64 (4):1-11.
Famigliett, J.S. (2014). The global groundwater crisis. Nat. Clim. Change. 4,945-948.
Goyal, R.K. (2004). Sensitivity of evapotranspiration to global warming: A case study of arid zone of Rajasthan (India). Agric. Water Manage. 69(1):1–11.
INCCA, (2010). Indian Network for Climate Change Assessment, Climate Change and India: A 4x4 Assessment, Ministry of Environment and Forests, Government of India.
IPCC. (2007). Climate change 2007: The physical science basis. Contribution of working group I to the fourth assessment report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, United Kingdom an New York, NY, USA.
Kabat, P., Claussen, M., Dirmeyer, P.A., Gash, J.H.C., Guenni, L.B. De., Pielke, R.A., Vörömarty, C., Hutjes, R.W.A. and Lütkemeier. (2003). Vegetation, Water, Humans and the Climate. A new Perspective of an Interactive System. IGBP Series, Springer Verlag.
Mahmood, R. (1997). Impacts of air temperature variations on the Boro rice phenology in Bangladesh: implications for irrigation requirements. Agric. For. Meteorol. 84 (3-4):233–247.
Parekh, F. and Prajapati, K.P. (2013). Climate change impacts on crop water requirement for Sukhi reservoir project. Int. J. Innov. Res. Sci. Eng. Technol. 2(9),2-10.
Panwar, J. and Chakrapani, G.J. (2013). Climate change and its influence on groundwater resources. Current Sci.,105(1),37-46.
Peterson, D.F. and Keller, A.A. (1990). Effects of climate change on U. S. Irrigation. J Irrig. Drain. Eng. 116, 194–210.
Russell, S.C., Scanlon, R.B., Freddie, S.M., Reedy, R.C., Gates, J.B. and Zhang, Lu. (2013). Potential climate change effects on groundwater recharge in the High Plains Aquifer, USA. Wat. Res Resour.49(7),3936-3951.
Shahid, S. (2011). Impact of climate change on irrigation water demand of dry season Boro rice in northwest Bangladesh. Clim. chang. 105, 433-453.
Trenberth, K., Stepaniak, D.P. and Caron, J.N. (2007). Atlantic hurricanes and natural variability in 2005. Geophys. Res. Lett. 33:L12704.
Tung, C.P. and Haith, D.A. (1998). Climate change, irrigation and crop response. J of the Am. Water Res. Assoc. 24(5),1071–1085.
Yano, T., Aydin, M. and Haraguchi, T. (2007). Impact of climate change onirrigation demand and crop growth in a Mediterranean environment of Turkey. Sensors 7,2297–2315.
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