Course Description

The inflow design flood represents the most severe flood event that a dam is expected to safely handle during its service life. It is not simply a theoretical construct but a practical design input that directly influences the sizing of spillways, freeboard, and other safety features. In essence, the IDF defines the upper bound of hydrological loading on a dam. Its selection depends heavily on the consequences of failure, meaning that dams with higher downstream risk must be designed for more extreme flood scenarios. An inadequate IDF can result in overtopping, which is widely recognized as the leading cause of dam failure globally. Therefore, selecting an appropriate IDF is not only a technical decision but also a societal responsibility.

What you'll learn in this course?

• Understand the concept and importance of inflow design floods (IDF) in dam safety.

• Differentiate between Probable Maximum Flood (PMF) and other design flood criteria.

• Analyze hydrological methods used to estimate extreme flood events.

• Evaluate regulatory guidelines and risk-based approaches for flood selection.

• Assess reservoir routing and spillway capacity requirements.

• Identify failure risks associated with inadequate flood handling.

• Apply design considerations for accommodating extreme inflows.

• Integrate climate variability into flood estimation practices.

Prerequisites

• Basic understanding of civil engineering, hydrology, or water-resources infrastructure

• Familiarity with dams, flood hydrology, and basic hydraulic terminology is helpful