Quantitative assessment of flood risk with evaluation of the effectiveness of dam operation for flood control: A case of the Bago River Basin of Myanmar

Because property damage and loss of life owing to floods have increased in many countries in recent years, accurate assessment of flood risk is urgently needed for effective flood management. Improving the assessment of flood risk requires considering the impact of dam operation for flood control because dams and reservoirs play important roles in the assessment of flood hazards and associated damage.  This paper focused on the quantitative assessment of flood hazard and risk, including the effectiveness of dam operation for flood prevention. The risk was assessed by focusing on flood damage to residential buildings and assets and agricultural sectors for the largest recent floods and flood events with different return periods. Results show that the dam operation for flood control in the study area reduces the flood inundation area by approximately 10% and flood damage to buildings, assets, and agriculture by approximately 40%, 60%, and 10%, respectively.