constructing a dam on the turbulent ocean —

 having three types of water —

 (surrounded) ocean —

 born in thiruppāṛkadal (milk ocean) —

 ocean —

 making the ocean become dry —

in the vast ocean of deluge —

composed of water from three sources, viś from river, from spring and from rain —

made of three types of water —

having the ocean which has three types of water (river water, ground water and rain water) —

having 3 types of water —

ŏh emperumān, having the beauty like an ocean. —

surrounded by ocean —