Under the Water Resources Department, the water management in the State has been decentralised along basin lines and for effective control,
the entire State has been divided into the following four regions viz., Chennai, Trichy, Pollachi and Madurai.
Each Region is headed by the Chief Engineer with head quarters in Chennai, Trichy, Coimbatore and Madurai.
The Engineer-in-Chief, Water Resources Department assists the Government as the technical and administrative head of the department,
monitors and co-ordinates the functions of all the four Regional Chief Engineers and five functional Chief Engineers
who are specialized in overall planning and execution of irrigation projects respectively