Chennai's Effective Water Management Strategy

Chennai's Water Management During Northeast Monsoon

• Water Storage Levels: Chennai’s major reservoirs (Red Hills, Chembarambakkam, Poondi) are maintaining a combined storage level of 92.4%.
• Flood Prevention Strategy: A calibrated water release strategy by the Water Resources Department (WRD) has been implemented, allowing for gradual discharges to avoid sudden flooding in downstream areas, particularly in Manali and Ezhil Nagar.
• Rainfall Data:
  • Areas such as Ennore and Manali New Town experienced considerable rain amounts, with 62 cm and 56 cm respectively over three days due to Cyclone Ditwah.
• Infrastructure Improvements:
  • Construction of new canals and strengthening of bunds along the Kosasthalaiyar river have contributed to effective water management.
  • Specific flood management measures included alternating shutter operations and maintaining minimal outflows during heavy rainfalls.
• Operational Changes:
  • Floodgates of the Red Hills reservoir were operated based on inflow and rainfall rather than continuously, with shutters open six times since the monsoon began.
  • Water from Araniyar and Kesavaram anicuts was diverted to enhance storage at Poondi and Chembarambakkam reservoirs.
• Monitoring and Automation: The WRD deployed teams to monitor floodwater in rivers and is conducting trial runs for automating floodgate operations using a Supervisory Control and Data Acquisition (SCADA) system to improve efficiency.
• Impact on Local Communities: Residents noted a reduction in waterlogging compared to previous years, crediting better management strategies for preventing flooding in vulnerable areas.

This comprehensive approach reflects the WRD's proactive measures to manage water resources effectively during seasonal monsoons, crucial for reducing flood risk and ensuring the safety of residents in northern Chennai.