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Design storm studies for the Upper Krishna river catchment upstream of the Almatti dam site

Rakhecha, PR and Deshpande, NR and Kulkarni, AK and Mandal, BN and Sangam, RB (1995) Design storm studies for the Upper Krishna river catchment upstream of the Almatti dam site. Theoretical and Applied Climatology, 52 (3-4). pp. 219-229.

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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 m 3 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 km 2) 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.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer-Verlag
Uncontrolled Keywords: design storm; precipitation; probable maximum precipitation; reservoir; spillway design, India, Krishna River, Almatti Dam
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 29 May 2015 09:31
Last Modified: 29 May 2015 09:31

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