On the relations of the rainfall variability and distribution with the mean rainfall over India
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Along with averages, rainfall variability and distribution are important climatological information. In this study, using 114 years (1871–1984) data of 306 stations, it is demonstrated that the variability and spatial distribution of annual, summer monsoon and monthly rainfall are highly dependent upon the respective period mean rainfall variation over India. The magnitude of three selected absolute measures of variability, e.g. standard deviation, absolute mean deviation and mean absolute interannual variability is found to increase linearly with mean rainfall.
In order to describe the relation between the rainfall frequency distribution and the mean rainfall, a linear regression between the rainfall amount expected with a specified exceedance/non-exceedance probability and the mean rainfall amount is presented. Highly significant linear curves for a large number of probabilities specified in an average probability diagram clearly demonstrate the dependence of the rainfall frequency distribution on mean rainfall over India.
KeywordsIndia Climate Change Waste Water Linear Regression Spatial Distribution
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- Antarkar, V. N., 1965: Correlation between mean annual rainfall and its standard deviation.Ind. J. Met. Geophys. 16, 441–444.Google Scholar
- Cocheme, J., Franquin, P., 1967: An agroclimatology survey of a semiarid area in Africa south of Sahara. WMO Techn. Note No. 86, 25–26.Google Scholar
- Conrad, V., 1941: The variability of precipitation.Mon. Wea. Rev. 69, 5–11.Google Scholar
- India Meteorological Department, 1981: Climatological atlas of India. Part I: Rainfall. New Delhi, 69 Charts.Google Scholar
- Landsberg, H., 1951: Statistical investigations into the climatology of rainfall on Oahu (T.H.). In: On the rainfall of Hawaii: a group of contributions. Am. Met. Soc., Meteorological Monographs, Vol. I, 7–14.Google Scholar
- Nicholls, N., 1988: El-Niño — Southern oscillation and rainfall variability.J. Climate 4, 418–421.Google Scholar
- Parthasarathy, B., 1984: Some aspects of large scale fluctuations in the summer monsoon rainfall over India during 1871–1978. Ph. D. Thesis, University of Poona, Pune (India), 370 pp.Google Scholar
- Rainbird, A. F., 1967: Methods of estimating areal average precipitation. WMO, Geneva, 42 pp.Google Scholar
- Rao, K. N., George, C. J., Abhyankar, V. P., 1971: Nature of the frequency distribution of Indian rainfall (monsoon and annual). Rep. No. 168, India Meteorological Department, Pune (India).Google Scholar
- Singh, N., 1984: Fluctuations of different moisture regimes in India.Arch. Met. Geophys. Biokl., Ser. B 35, 239–256.Google Scholar
- Singh, N., 1986a: Spatial variations of probability distribution of annual precipitation in India.Mausam 37, 507–510.Google Scholar
- Singh, N., 1986b: On the duration of the rainy season over different parts of India.Theor. Appl. Climatol. 37, 51–62.Google Scholar
- Singh, N., Rao, P. G., Rupa Kumar, K., 1985: Variability and distribution of annual precipitation in India.Geogr. Rev. India 47, 38–49.Google Scholar
- Singh, N., Krishna Kumar, K., Mali, R. R., 1987: Probability distribution of summer monsoon rainfall and delineating rainfall zones in India. Proc. Precipitation Analysis and Flood forecasting. 30th June, 1984, I.I.T.M., Pune (India), 23–30.Google Scholar
- Weibull, W., 1939: A statistical theory of the strength of materials. Ing. Vetenskaps Akads, Handl, Stockholm, 151, 15.Google Scholar
- WMO, 1966: Climatic Change. WMO Techn. Note No. 79, WMO-195, TP 100.Google Scholar