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The probable maximum flood at the Ukai and Lakhwar dam sites in India

Rakhecha, PR and Clark, C (2002) The probable maximum flood at the Ukai and Lakhwar dam sites in India. In: The Extremes of lite Extremes: Extraordinaiy Floods, July 2000, Reykjavik , Iceland ..

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Abstract

The design of impounding structures where failure would lead to catastrophic loss of life requires an estimate of the probable maximum flood. In India there are over 3000 dams and more are being built and planned to meet the needs for water supply, power, and irrigation. Recently, revised estimates of probable maximum precipitation have been published. These new estimates are used in conjunction with instantaneous unit hydrographs (IUH) to assess the safety of two dam sites: the Lakhwar dam on the Yamuna River, and the Ukai dam on the Tapi River. The results show that at the first site the outflow exceeded the design value of the spillway by a factor of 2.27, while at the second site the ratio was 2.25. The IUH results are supported by flood frequency analyses using a modified Gumbel scale and also results derived from the Rational method. These outcomes illustrate that in India more attention to dam safety is a dire need for the future.

Item Type: Conference or Workshop Item (Other)
Additional Information: Proceedings of a symposium held at Reykjavik,Iceland,IAIS Publ. no.271, 2002
Uncontrolled Keywords: Dams; Hydrographic surveys; Precipitation (meteorology); Water supply; Flood frequency analysis; Floods; dam; flood flow; flood frequency; hydrograph; safety dam; flood frequency; safety; unit hydrograph India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 02 Jun 2015 09:51
Last Modified: 02 Jun 2015 09:51
URI: http://moeseprints.incois.gov.in/id/eprint/1550

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