Delhi govt approves ₹622 crore flood-control projects, including a 4.7 km Yamuna RCC wall and ₹260 crore biomining to dispose of drain silt. The Board focused on long-term solutions to flooding and waterlogging, scientific disposal of desilted earth, stronger drainage infrastructure, and better preparedness for the monsoon. New Delhi [India], October 23 (ANI): The Delhi government has approved projects worth ₹622 crore to strengthen the city’s flood management system, including a 4.