Military hydrology. Report 12. Case study evaluation of alternative dam-breach flood wave methods. Volume 2. Teton case study.
The Teton Dam on the Teton River in Idaho failed on June 5, 1976. Eleven lives were lost and damages reportedly cost about 400 million. The newly constructed reservoir being filled for the first time during the Spring of 1976, contained 251,7000 acre/feet of water and was almost full when the 305 foot high earthfill dam failed. This report provides a comparative evaluation of several leading state of the art models for dam breach flood forecasting. Nine alternative mathematical models were applied using data sets from four case studies. Results obtained were compared between models and with available measured data. Model accuracy, versatility, and ease of use were evaluated, and complexities and weaknesses were identified. The sensitivity of model results to various input data parameters was also investigated. The documented quantitative results provide an empirical data base for analyzing the performance of the models under various conditions. (from author's abstract)