Tiruvannamalai District Profile

• Tiruvannamalai district is bounded on the North and Northwest by Vellore district and west by Dharmapuri district and south by Villupuram districts and east by Kancheepuram district.
• The District lies between 12º 00'00’’to 12º 52’30’ North latitude and East Longitude 78º 39’30’’ to 79º 45’36’’. The total geographical extent of the area is 6190 Sq.Km.

Physiography and Drainage

• The entire district is an undulating terrain with isolated hillocks on the western and north western parts.
• The western part of the district is covered by Javadhu hill ranges while the eastern part is characterized by isolated hillocks.
• Tiruvannamalai hill occurs right in the centre of the town with an elevation of 800m (2668ft).
• There are many isolated hillocks and tor complexes seen in Tiruvannamalai, Thandarampet, Chengam, Polur, Arni and Kalasapakkam blocks.
• The major rivers traversing the area are Thenpennaiyar, Cheyyar and Kamandala Naganadhi.
• The major part of the district falls under the Palar sub catchment and extreme southern part of the district fall under Thenpennaiyar sub catchment.

Rainfall:

The average annual rainfall and the 5 years rainfall collected from IMD, Chennai is as follows:

Geology:

Ground Water Level:

The Ground Water levels from the 58 number of observation wells of TWAD have been analysed for Post-Monsoon and Pre-Monsoon. 5 years average Ground water level in m Below Ground Level for pre and post monsoon is as follows:

Sustainability:

With a view to enhance the Sustainability of the drinking water sources, recharge structures are being implemented by TWAD Board under various State and Central Government assistances.

The Recharge Structures implemented so far in district is as under.

Categorization of Firkas:

The status of Categorization of firkas as of March 2020 for the District in is shown below.

Rural Habitations

Total No. of Rural Habitations: 4753