Three examples of hydraulic structures in India developed in ancient times are :
(i) For channelling the flood water of Ganga, water harvesting system was built near Allahabad in the first century BC.
(if) Dams, lakes and irrigation systems were built during the time of Chandragupta Maurya.
(iii) Sophisticated irrigation systems were found in Orissa, Andhra Pradesh, Karnataka and Maharashtra.
(iv) In the 11th century, Bhopal Lake, one of the largest artificial lakes of its time, was built.
(v) The tank in Hauz Khas, Delhi was constructed by lltutmish for supplying water to Siri Fort area in the 14th century.