**5. Conclusions**

This study applied the multi-criteria decision-making analysis approach in Geographic Information Systems. It was used in several studies around the world and recommended for flash flood hazard and risk mapping. There are no previous studies that applied this technique for assessing flash floods in this study area. This technique is considered the most effective because it has the ability to link multi-sources spatial data at the same scale to detect the best geospatial solution for decision-makers. In this study, the available criteria were used and combined in the weighted overly modeling in GIS to map the vulnerable areas with a flash flood in a watershed basin in Middle Egypt. The results of this study show a higher flood zone in the downstream area; this area is occupied by highways, cultivated lands, and human settlements. It is highly recommended to use MCDA-based AHP techniques for flash flood hazard and risk mapping in future studies.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** All the data of the study are presented in the paper.

**Conflicts of Interest:** The author declares no conflict of interest.
