Surplus land can be made available by covering large drains running in various zones of city, like the Najafgarh drain which passes through Punjabi Bagh, Mukherjee Nagar etc in north-west Delhi.
The other drains which could be explored to yield prime land: the drain from Anand Vihar to Vasundhra-East End Apartments in trans-Yamuna. And in the south district, the drain passing from INA through CGO Complex towards Jangpura and Nizamuddin and the one between Kidwai Nagar Extension and AIIMS and South Extension II on the other.
(Tomorrow: How to work out the rehab plan, according to Khanna)