Author(s)

M. Hartnett, T. Hayes & B. Mangan

Abstract

Dam breach floods - downstream inundation analyses M. Hartnett,' T. Hayes,* B. Mangan,* o Department of Civil, Structural & Environmental Engineering, Trinity College, Dublin 2, Ireland, UK * ESB International, St Stephens Green, Dublin 2, ABSTRACT Many existing dams were constructed with little regard to the effects of a breach on downstream water levels. The failure of large and medium size dams, such as Teton Dam, however, has highlighted the need for downstream inundation studies. In this paper the authors present frequently used inundation prediction techniques and detail the model developed at the National Weather Service, US, DAMBRK. The application of this model and dimensionless graphs to a major hydroelectric scheme in Ireland is outlined and results discussed. INTRODUCTION In 1984, the Electricity Supply Board of Ireland, ESB, initiated a major safety review of all its hydro-electric dams. As part of this work it was decided to carry out inundation studies downstrea

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