Rainwater harvesting in a residence in Velachery, Chennai, Tamil Nadu - Need details

I am a civil engineer. I am constructing my dream home at Velachery –Chennai.  It is a water logged area during rains and the ground water is as saline as sea water, I am not using the bore water for construction. Please advise me as to how to construct effective rain water harvest methods for this case.

With regards
P.G.Suresh

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