Long term rainfall data analysis over Eastern Ganga canal command area
DOI:
https://doi.org/10.53550/Keywords:
Eastern Ganga canal command, Man-Kendall test, Rainfall trend, Rainfall variability, Sen’s slope estimatorAbstract
An attempt has been made in the present study to analyse the variability and trends in annual and seasonal rainfall over Eastern Ganga Canal (EGC) command area, India. 0 0 The daily gridded (0.25 x0.25 ) rainfall dataset prepared by the India Meteorological Department (IMD), Pune is used in the present study for the time period 1901-2012. Total 12 grids of IMD rainfall data covering entire command and surrounding area were selected for analysing the trend. To determine the trend in annual rainfall, seasonal rainfall, annual number of rainy days and seasonal number of rainy days, the non-parametric Mann-Kendall (MK) and Sen's methods were used. It has been observed that annual and monsoon rainfall has decreasing trend in grids 6, 7, 12 whereas, no significant trend has been observed in other grids (1, 2, 3, 4, 5, 8, 9, 10, 11). Similarly increasing trend was observed in grids 5, 9, 10 in case of annual rainy days, whereas, grids 6, 7, 8, 12 exhibits decreasing trend. In case of number of rainy days in monsoon season, decreasing trend has been observed in grids 6, 7, 12 with increasing trend only in grid 5 and no significant trend in remaining grids (1, 2, 3, 4, 8, 9, 10, 11). In general, the results of trend analysis revealed a decreasing trend in annual and -1 -1 monsoon rainfall in the range of 18.5 to 61.7 mm decade and 19.4 to 56.7 mm decade , -1 respectively. Decreasing trend of 1.8 to 2.9 days decade was observed in some parts of the command area in annual rainy days, whereas some part showed increasing trend -1 in the range of 0.2 to 1.4 days decade . In case of number of rainy days in monsoon -1 season, the decreasing trend varies from 1.4 to 2.2 days decade whereas the increasing -1 trend in grid 5 is 1.0 days decade . The variability analysis has also been performed to highlight the frequency of dry and wet years. The coefficient of variability of annual rainfall, seasonal rainfall, annual number of rainy days and number of rainy days in monsoon ranges from 0.24 to 0.31, 0.29 to 0.38, 0.14 to 0.21 and 0.20 to 0.27, respectively. Analysis for dry year and wet year on annual scale were carried out for command area, which showed that there are 18 dry years and 21 wet years within 1901 to 2012. The driest year and wettest year were 1987 and 1942, respectively.
References
Anderson, R.L. 1941. Distribution of the serial correlation coefficients. Ann. Math. Stat., 8 (1): 1-13.
Basistha, A., Arya, D.S. and Goel, N.K. 2009. Analysis of historical changes in rainfall in the Indian Himalayas. Int. J. Climatol., 29: 555-572.
Becker, S., Cemmer, M. and Tong, J., 2003. Observed and interpolated precipitation trends and variability in the Yangtze catchment area. J. Lake Sci., 15: 123-130.
Bocheva, L., Marinova, T., Simeonov, P. and Gospodinov, I., 2009. Variability and trends of extreme precipitation events over Bulgaria (1961-2005). Atmos. Res., 93: 490-497.
Caloiero, T., Coscarelli, R., Ferrari, E. and Mancini, M. 2011. Trend detection of annual and seasonal rainfall in Calabria (Southern Italy). Int. J. Climatol., 31: 44-56.
Cruz, R.V., Harasawa, H., Lal, M., Wu, S., Anokhin, Y., Punsalmaa, B., Honda, Y., Jafari, M., Li, C. and Huu Ninh, N. 2007. Asia climate change 2007: impacts, adaptation and vulnerability. In: Parry M.L., Canziani O.F., Palutikof J.P., van der Linden P.J., Hanson C.E. (eds). Fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp. 469-506.
de la Casa, A. and Nasello, O. 2010. Breakpoints in annual rainfall trends in Córdoba, Argentina. Atmos. Res., 95: 419-427.
de Lima, M.I.P., Carvalho, S.C.P., de Lima, J.L.M.P. and Coelho, M.F.E.S., 2010. Trends in precipitation: analysis of long annual and monthly time series from mainland Portugal. Adv. Geosci., 25: 155-160.
de Luis, M., Brunetti, M., Gonzalez-Hidalgo, J.C., Longares, L.A. and Martin-Vide, M. 2010. Changes in seasonal precipitation in the Iberian Peninsula during 1946-2005. Global Planet. Change, 74(1): 27-33.
de Luis, M., Raventós, J., González-Hidalgo, J.C., Sánchez, J.R. and Cortina, J. 2000. Spatial analysis of rainfall trends in the region of Valencia (east Spain). Int. J. Climatol., 20(12): 451-469.
del Rio, S., Penas, A. and Fraile, R. 2005. Analysis of recent climatic variations in Castile and Leon (Spain). Atmos. Res., 73: 69-85.
Dore, M.H.I. 2005. Climate change and changes in global precipitation patterns: what do we know. Environ. Int., 31: 1167-1181.
Fleer, H., Schweitzer, B. and Raatz, W. 1984. Rainfall fluctuations in India and Sri Lanka and large-scale rainfall anomalies. Mausam, 35(2): 135-144.
Fu, G.B., Charles, S.P., Yu, J.J. and Liu, C.M., 2009. Decadal climatic variability, trends and future scenarios for the North China Plain. J. Clim., 22: 2111-2123.
Gong, D.Y. and Wang, S.W. 2000. Severe summer rainfall in China associated with enhanced global warming. Clim. Res., 16: 51-59.
Huang, Y., Cai, J., Yin, H. and Cai, M. 2009. Correlation of precipitation to temperature variation in the Huanghe River (Yellow River) basin during 1957-2006. J. Hydrol., 372: 1-8.
IPCC, 2007. Climate change 2007: the physical science basis. In: Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Solomon S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K.B., Tignor, M. and Miller, H.L. (eds). Cambridge University Press: Cambridge, New York.
IPCC, 1996. In: Houghton, J.T., Meira Filho, L.G., Callander, B.A., Harris, N., Kattenberg, A. and Maskell, K. (eds.), Climate Change 1995: The Science of Climate Change. Cambridge University Press, Cambridge, New York.
Kripalani, R.H., Kulkarni, A., Sabade, S.S. and Khandekar, M.L. 2003. Indian Monsoon variability in a global warming scenario. Natural Hazards, 29(2): 189-206.
Kripalani, R.H. and Kulkarni, A. 1997. Rainfall variability over southeast Asia-connections with Indian monsoon and ENSO extremes: New perspectives. Int. J. Clim., 17(11): 1155-1168.
Kripalani, R.H. and Kulkarni, A. 2001. Monsoon rainfall variations and teleconnections over South and East Asia. Int. J. Clim., 21(5): 603-616.
Krishnakumar, K.N., Prasada Rao, G.S.L.H.V. and Gopakumar, C.S. 2009. Rainfall trends in twentieth century over Kerala, India. Atmos. Environ., 43: 1940-1944.
Kumar, V., Jain, S.K. and Singh, Y. 2010. Analysis of long-term rainfall trends in India. Hydrol. Sci. J–Journal des Sci. Hydrologiques, 55(4): 484-496.
Kendall, M.G. 1975. Rank correlation methods. Griffin, London.
Lakshmanaswamy, B. and Jindal, O.P. 1990. Statistical analysis on the variability of area weighted rainfall over India. Mausam, 41(4): 569-574.
Li, Z., He, Y., Wang, C., Wang, X., Xin, H., Zhang, W. and Cao, W. 2011. Spatial and temporal trends of temperature and precipitation during 1960-2008 at the Hengduan Mountains, China. Quat. Int., 236: 127-142.
Liang, L., Li, L. and Liu, Q. 2011. Precipitation variability in Northeast China from 1961 to 2008. J. Hydrol., 404: 67-76.
Liu, Q., Yang, Z. and Cui, B. 2008. Spatial and temporal variability of annual precipitation during 1961–2006 in Yellow River Basin China. J. Hydrol., 361: 330-338.
Mann, H.B. 1945. Non-parametric tests against trend. Econometrica, 13: 245-259.
Kumar, A., Pal, R. and Sharma, H.C. 2007. Probability analysis of mansoon rainfall date for agricultural planning. Ind. J. Soil Cons., 35(2) : 122-124.
Mooley, D.A. and Parthasarathy, B. 1984. Fluctuations in All-India Summer Monsoon Rainfall during 1871-1978. Climatic Change, 6: 287-301.
Panigrahi, B. and Panda, S.N. 2001. Analysis of weekly rainfall for crop planning in rainfed region. J. Agril. Eng., 38(4): 47-57.
Partal, T. and Kahya, E. 2006. Trend analysis in Turkish precipitation data. Hydrol. Process., 20: 2011-2026.
Parthasarathy, B. and Dhar, O.N. 1976. A study of trends and periodicities in the seasonal and annual rainfall of India. Indian J. Meteor. Hydrol. Geophy., 27(1): 23-28.
Parthasarathy, B. and Mooley, D.A. 1978. Some features of a long homogeneous series of Indian Summer Monsoon Rainfall. Monthly Weather Review, 106: 771-781.
Qian, W. and Zhu, Y. 2001. Climate change in China from 1880 to 1998 and its impact on the environmental condition. Clim. Change, 50: 419-444.
Qin, N., Chen, X., Fu, G., Zhai, J. and Xue, X. 2010. Precipitation and temperature trends for the Southwest China: 1960-2007. Hydrol. Process., 24(25): 3733-3744.
Sen, P.K. 1968. Estimates of the regression coefficient based on Kendall's tau. J. Am. Stat. Assoc., 63: 1379-1389.
Singh, N., Sontakke, N.A., Singh, H.N. and Pandey, A.K. 2005. Recent Trend in Spatiotemporal Variation of Rainfall over India-An investigation into Basin-scale Rainfall Fluctuations, IAHS-AISH Pub., 296: 273-282.
Srivastava, H.N., Dewan, B.N., Dikshit, S.K., Prakash Rao, G.S.P., Singh, S.S. and Rao, K.R. 1992. Decadal trends in climate over India. Mausam, 43(1): 7-20.
Stephenson, D.B., Douville, H. and Rupakumar, K. 2001. Searching for a fingerprint of global warming in the Asian Summer Monsoon. Mausam, 52(1): 213-220.
Subash, N., Singh, S.S. and Priya, N., 2011. Variability of rainfall and effective onset and length of the monsoon season over a sub-humid climatic environment. Atmos. Res., 99: 479-487.
Ventura, F., Rossi Pisa, P. and Ardizzoni, E. 2002. Temperature and precipitation trends in Bologna (Italy) from 1952 to 1999. Atmos. Res., 61: 203-214.
Xu, Z.X., Li, J.Y. and Liu, C.M. 2007. Long-term trend analysis for major climate variables in the Yellow River basin. Hydrol. Process., 21: 1935-1948.
Xu, K., Milliman, J.D. and Xu, H. 2010. Temporal trend of precipitation and runoff in major Chinese Rivers since 1951. Global Planet Change, 73: 219-232.
Xu, X., Du, Y., Tang, J. and Wang, Y. 2011. Variations of temperature and precipitation extremes in recent two decades over China. Atmos. Res., 101(1-2): 143-154.
Yue, S. and Hashino, M. 2003. Long term trends of annual and monthly precipitation in Japan. J. Am. Water Resour. Assoc., 39(3): 587-596.
Zhang, Q., Xu, C.Y., Zhang, Z., Chen, Y.D. and Liu, C.L. 2009. Spatial and temporal variability of precipitation over China, 1951-2005. Theor Appl. Climatol., 95: 53-68.
