Flood damage assessment for the Phan-Ca Lo River basin in Vinh Phuc Province, Vietnam

In this research, the authors aim to evaluate the damage caused by floods in Vinh Phuc Province. The study incorporates the construction of hydro-hydraulic models and the development of damage functions for the main elements at risk. In order to ensure the accuracy of the calculated results, the hydro-hydraulic models and damage curves are verified for their reasonableness. The outcomes of this study give us an overview of flood damage in the research area. It indicates that the potential level of flood damage is a matter of significant concern, with an annual damage estimate of approximately 6.9 million USD. The research also reveals the distribution of damage by sector and by space. According to the research findings, the greatest damage was in Vinh Tuong District, where most of the damage was caused by flooding of agricultural land. In contrast, residential buildings in the area suffered relatively little damage compared to agricultural land. This information is crucial for decision-makers to implement effective and targeted mitigation measures. HIGHLIGHTS Developing a hydrological and hydraulic model to flooding in Phan-Ca Lo basin. Mathematical models are effective tools for hazard assessment. Establishing two specific damage functions for residential area and agricultural land of Vinh Phuc Province. Assessing flood damage in Vinh Phuc Province through damage-frequency curve and the expected annual damage.