SEC-HY21 is a general-purpose two-dimensional surface water modeling system. This integrated window-based software can be widely applied in the following analysis and simulations.

• River and coastal hydraulics
• Storm surge
• Tsunami
• Dam-break or dike-break induced flood
• Combined pluvial and fluvial urban flood
• Landslide-generated surge
• Aquatic habitats
• Pollutant transport
• Sediment transport and morphodynamics
• Debris and mud flow
• Turbid density currents