In the Rastrapathi Bhavan the first Layer of clay and
sand extends to depth of 3m, which is followed clay inter mixed
with Kankar 8m below ground level. This is followed by layer of
sand between 8 to 10m. This is followed by weathered and fractured
quartzite, which extends up to 40m bgl. This is followed by partially
fractured quartzite, which extends to greater depths.
A comparative study of water level map of 1960 and 2002
shows in Rastrapathi Bhavan the water level which was at 5 m bgl
has gone down to 10 to 15 mts bgl.
In Rastrapathi Bhavan fresh water occurs at all depths
|IV.RECOMMENDATION FOR AUGMENTATION
In this area the rainwater can be diverted to the weathered
and fractured quartzite formations.