Course 3 - Dam-break flood risk modelling and emergency planning
LNEC, Library
About the Course
Speakers
Effective Emergency Action Plans (EAPs) at high-hazard potential dams are crucial for minimizing loss of life and property damage from dam failures. Enhancing dam safety and preparedness among dam owners, operators, safety managers, emergency officials, and downstream communities is essential for risk mitigation.
This course focuses on the critical components of EAPs, detailing their objectives, implementation responsibilities, and the significance of early warning systems allowing the participants to develop a comprehensive understanding of emergency levels and their implications.
The course integrates historical dam failures, legal frameworks, hydraulic and hydrological principles, and practical exercises, offering a thorough exploration of dam safety and emergency planning. Participants will develop advanced skills in hydraulic modelling, mastering dam-break flood hydrograph estimation and downstream flood propagation analysis. By using HEC-RAS software, they will engage in practical sessions to simulate flood scenarios, ensuring precise delineation of flood areas and enhancing their capability in emergency response planning for dam-related incidents.
Emergency planning at the dam level covers detection and classification of events and dam anomalies, response actions and notification. The course also examines emergency planning in downstream valleys, namely warning and evacuation, highlighting Portuguese and Brazilian experiences. By analysing catastrophic case studies, participants will gain critical insights into civil defence strategies, challenges, and solutions, enhancing their emergency preparedness and response capabilities.
Teresa Viseu Principal Researcher, LNEC
João Fernandes Assistant Researcher, LNEC
Sílvia Amaral Assistant Researcher, LNEC
Rafael Pereira Machado Brazilian Civil Protection and Defence Agency
Final Programme
9:00 – 10:30 General framework
Teresa Viseu
Historical failures and the global legal framework
Dams Emergency Plans:
General contents and goals
Identification of main responsibilities
Notification and early warning systems
10:30 – 11:00 – Coffee break
11:00 – 13:00 Dam-break Flood simulation
João Fernandes
Case study presentation and hydrology notions applied to dams
Dam failure simulation for flood hydrograph estimation
Flood hydrograph propagation in the downstream valley
General concepts of the simulation software - HEC-RAS
Entering input data into the software: dam, reservoir and topography of the downstream valley
Simulation of flood propagation and flood areas delimitation
13:00 – 14:00 – Lunch
14:00 – 16:00 Emergency planning at dam level
Sílvia Amaral
Emergency Action Plans for dams
Emergency levels
Detection and classification of events and dam anomalies
Dam response actions
Case study: Internal Emergency Management
16:00 – 16:30 – Coffee break
16:30 – 18:30 Emergency planning in the downstream valley
Rafael Pereira Machado
Changes in Brazilian Legislation following the dams’ accidents of Brumadinho and Fundão
The Brazilian experience and the challenges in implementing Emergency Action Plans (EAP) for dams
Brazilian Civil Protection Legislation - Contingency Plans (PLANCON)
Integration procedures between the Emergency Action Plans (EAP) and PLANCON – Practical approach