Estimation of River Parameters Using River Cross Sections and Its Application to Runoff Inundation Simulation

Key Points

• The study aims to estimate river parameters from cross-section data for flood simulation models.
• Utilized cross-section data from national river observation stations.
• Derived regression equations based on watershed area and river flow characteristics.
• Applied estimated rectangular cross-sections to a runoff inundation model (RRI model).
• Significant effects of river width and depth variations on model outcomes were observed.
• Minimal changes were noted in areas prone to flooding despite parameter adjustments.