Why is the raise of water level a threat to Mullahperiyar dam?

The rise in water level at the Mullaiperiyar Dam poses a threat due to the potential for structural failure, as the dam was built in the early 20th century and may not withstand extreme pressures from excessive water. Additionally, heightened water levels increase the risk of seepage and erosion, which can compromise the dam's integrity. Concerns about the dam's safety are exacerbated by geological factors, including the seismic activity in the region. Therefore, monitoring and managing water levels is crucial to ensure the dam's stability and prevent catastrophic failures.