Summary
The Almatti dam is the major engineering feature in the development of water resources in the Upper Krishna river forming a storage reservoir of 6425 million m3 at spillway crest level. In this paper, the design storm rainfalls for different return periods and also the Probable Maximum Precipitation (PMP) for the catchment above Almatti dam have been estimated to review the adequacy of the flood spillway design for the dam. The design storm rainfalls of various return periods have been computed from a statistical analysis of point and areal time series of annual maximum rainfall. In evaluating the PMP, the maximum observed rainfall obtained by Depth Duration method were maximized as the orography of the Western Ghats plays profound influence over the catchment. It was found that (area 35925 km2) the highest areal rainfalls over the catchment were 14.0 cm, 21.5 cm and 24.6 cm in 1, 2 and 3-day durations, respectively. These are scaled up by a factor of 1.23 to obtain the PMP rainfalls. The areal PMP estimates for the upper Krishna River (UKR) catchment above Almatti dam have been found to be 18.0 cm, 27.0 cm and 31.0 cm, respectively.
Similar content being viewed by others
References
Central Water Commission, 1972: Estimation of design flood recommended procedures. New Delhi, 130 pp.
Dhar, O. N., Rakhecha, P. R., Mandal, B. N., 1977: Estimation of design storm for the Subarnrekha basin upto Chandil and Ghatsila dam sites.J. Power and River Valley Devp. 27 (9), 338–343.
Gumbel, E. J., 1958:Statistics of Extremes. New York: Columbia Univ. Press.
Kathuria, S. N., Kulkarni, S. D., 1993: Design storm studies of medium projects in Orissa. Proc. Symp. on Unusual storm events and their relevance to dam safety and snow hydrology, CBIP Publ. No. 234, 11–16.
Rakhecha, P. R., Deshpande, N. R., Nandargi, S. S., 1990: Maximum persisting dew points during the southwest monsoon over India.Mausam 41 (1), 140–142.
Rakhecha, P. R., Kulkarni, A. K., Mandal, B. N., Sangam, R. B., 1990: Design storm estimation of Ponnaiyar river catchment above Sathnur dam site.Hydrology J. IAH 13 (4), 229–240.
Rao, K. L., 1975: India's Water Wealth. New Delhi: Orient Longman, 255 pp.
WMO, 1986: Manual for estimation of probable maximum precipitation. World Meteorological Organization Operational Hydrology Report No. 1, WMO No. 232 (Second Edition).
Author information
Authors and Affiliations
Additional information
With 6 Figures
Rights and permissions
About this article
Cite this article
Rakhecha, P.R., Deshpande, N.R., Kulkarni, A.K. et al. Design storm studies for the Upper Krishna river catchment upstream of the Almatti dam site. Theor Appl Climatol 52, 219–229 (1995). https://doi.org/10.1007/BF00864045
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00864045