Joint probability analysis of flood hazard at river confluences using bivariate copulas

Abstract

Estimation of flood hazard associated with return period of a hydrologic event is the basis for design of flood protection structures. More frequent occurrence of flood events in recent history has imposed the need to reconsider traditional hydrological approaches to estimation of high flow events. This paper focuses on estimation of peak flood discharge at two confluences of the Sava River. The results show that the peak discharge trend estimated using bivariate copulas is comparable to the values measured during an extreme flood event in 2014.