In this study, to estimate loss of life considered flood characteristics using the relationship derived from
analysis of historical dam break cases and the factors determining loss of life, the loss of life module applying
in LIFESim and loss of life estimation by means of a mortality function were suggested and applicability
for domestic dam watershed was examined. The flood characteristics, such as water depth, flow velocity
and arrival time were simulated by FLDWAV model and flood risk area were predicted by using inundation
depth. Based on this, the effects of warning, evacuation and shelter were considered to estimate the number
of people exposed to the flood. In order to estimate fatality rates based on the exposed population, flood
hazard zone is assigned to three different zones. Then, total fatality numbers were predicted after determining
lethality or mortality function for each zone. In the future, the prediction of loss of life due to dam break
floods will quantitatively evaluate flood risk and employ to establish flood mitigation measures at downstream
applying probabilistic flood scenarios.