Google Earth Satellite imagery reveals the subtle terrain across the 1158.60 acres of HSIIDC site. The existing site topography study reveals the low points on the site along which the storm water drains northwards leading to the Najafgarh drain.
The two villages are located on a relatively higher terrain that allow the water to be drained to the surrounding. The existing water bodies on the site are located at specific low point that are vulnerable to water clogging and are the best locations for ground water recharging wells. The yellow arrows indicate the primary system of surface drains that predominantly moves
towards the north, while the red arrows represent the local secondary system that feed the primary drain channels. The white patches represent higher altitudes as compared to the surrounding areas shown in blue.
This exercise of water table mapping can help design open space networks, planned along these low lying areas instead of development areas to avoid the risk of flooding during heavy downpours. These areas are also ideal for rain water harvesting sites.