**4. Conclusions**

Numerous methods have been developed to assess flood risk. In this study, a methodology was proposed for use in decision-making by integrating existing methods rather than developing another flood risk assessment method. First, previous flood risk assessment methods were evaluated (PFD, EFVI, FDRRI, FVA, FDI, and RSA), and four components and 28 indicators were extracted. Factor analysis and PCA were carried out, and 11 of the 28 indicators were selected as a result. Then, the weights of each component and indicator were estimated by the AHP, CSS, and entropy methods, and the results of each method differed from one another. Therefore, BNs that integrate the conventional weight assignment methods were structured to estimate integrated weights.

The BN-based InFRA was applied to target regions to estimate the flood risk of each region. The result of both qualitative and quantitative comparisons between InFRA and the conventional methods demonstrated the excellent applicability of InFRA. The InFRA methodology can integrate various other flood risk assessment methods and it could be used as a useful tool in decision-making for flood risk management.

**Author Contributions:** Conceptualization and methodology, H.J. and S.K.; statistical analysis, C.C., J.K. and D.K.; writing-original draft preparation, H.J.; Final review, H.S.K.; supervision, S.K. and H.S.K.

**Funding:** This research was supported by a grant [MOIS-DP-2015-05] through the Disaster and Safety Management Institute funded by Ministry of the Interior and Safety of Korean government.

**Conflicts of Interest:** The authors declare no conflicts of interest.
