The Failure of Embankment Dams due to Overtopping - neuveden - diskuze

The existence of the dams retaining water either permanently or occasionally, is always connected with the risk of their failure. The failure of a dam gives rise to a flood wave that advances in the area behind the dam or through the valley below the dam. The effects of a dam break wave originated in this way may be disastrous and may cause numerous fatalities as well as financial losses exceeding many times the price of the hydraulic structure itself. In context with catastrophic floods, namely those in July 1997 and August 2002, and also with local flood events which occur almost every year, the dam safety problem became topical also in the Czech Republic, where more than 100 small dams and levees failed and about 10 large dams were seriously endangered due to overtopping. Contents The monograph aims to cover both theoretical and practical issues dealing with embankment dam breaching due to overtopping. It starts with the definition of the problem and related terminology. The third chapter provides the comprehensive database of dam failures all over the world and the statistical analysis of data dealing with dam construction and dam failures. In the fourth chapter, the dam breach mechanism during dam crest overtopping is described and analysed for various types of earth dam body. The description is demonstrated using experimental dam breach modelling results obtained by the authors of this monograph and other documents from abroad. The theoretical background of the dam eros
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