The channelized drain from Dhansa regulators to Keshopur Bus Depot on Outer Ring Road is wide with thick and high embankments.

A vast amount of water is retained in this widened drain by closing the Kakrola regulators under Najafgarh Road to recharge the local ground watertable; hence it acts like an elongated lake as well.

Due to the rich wildlife observed in and around the less polluted stretch of the drain outside of congested populated areas, it has been proposed as a bird sanctuary for Delhi.

Kapur was invited to the area for touring the site where he also heard accounts of local villagers about the rampant illegal hunting of waterbirds that went on here every year.

[12][13][14] The Najafgarh drain has been much widened over the past decades and now has thick mud embankments on both its sides to channel the waters and protect Delhi from floods, these embankments have been planted with thick forest cover which serve as a much needed habitat for remnant local wildlife occurring in nearby and surrounding farmlands including common foxes, jackals, hares, wild cats, nilgai, porcupines and various reptiles and snakes including the dreaded cobras.

Bird-watchers and nature-lovers can view the wildlife and waterbirds occurring on the drain from vehicles by driving on this road and stopping intermittently and going down to the waters edge.

[21] The relatively cleaner portion of the drain in rural southwest Delhi before it enters densely populated and badly polluted area at Vikaspuri also attracts some small scale local village fishermen, occasionally one can be seen casting his line or net in the waters or floating on a black inflated truck tire tube spreading his fishing net across the breadth of the drain.

However, with recent advances in ecological understanding it has become clear that draining of this vast lake affected the entire climate of this important region that is India's capital territory and its neighborhood.

Before the unfortunate complete draining of this lake in the 1960s by widening of the Najafgarh drain by the Flood control and irrigation department of Delhi the lake in many years filled up a depression more than 300 square kilometres (120 sq mi) in rural Delhi, It had an extremely rich wetland ecosystem forming a refuge for vast quantities of waterbirds and local wildlife.