Application of HEC-RAS software in modelling of urban flooding by surface rainwater runoff and assessment of emergency conditions in case of precipitation of different availability

The presented paper investigates the application of HEC-RAS software for modelling of urban area waterlogging by surface rainfall runoff on the Black Sea coast of Russia. The authors assess the risk of emergencies caused by rainfall of different intensities. Using a digital elevation model and an orthophotoplane obtained by airborne laser scanning and aerial photography, the territory and surface types are analyzed. The results of the study identify sensitive areas and consider the feasibility of constructing barrier structures to manage surface runoff. Data on the capacity of the existing pipe and its effect on runoff accumulation are analyzed. The study is of practical relevance for risk assessment and emergency prevention measures related to surface runoff in urban environments on the Black Sea coast.