Tiruchirapalli District Profile

• Tiruchirappalli district is one of the inland districts in the State and lies in the Central Part of the State.
• The District lies between 10º 17' to 11º 25'N Latitude, 78º 09'to 79º 03'E Longitude and has an areal extent of 4511 sq.km.
• There are 14 Blocks, 404 Villages and 3340 Habitations in the District.

Physiography and Drainage

• Most of the District is a pediplain with a general slope towards the central part where River Cauvery and Coleroon flow.
• The entire district falls in Cauvery Basin and drained by River Cauvery and its tributaries like Ayyar, Uppar, and partly by Maruthaiyar, Ponnanaiyar, Koraiyar and partly by Vellar River System.
• There are small residual hills scattered in western and southern part of the district, prominent among them, is Rock Fort hill, located in the heart of Tiruchirappalli town.

Geology:

Rainfall:

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

Hydrogeology:

Ground Water Level:

The Ground Water levels from the 45 number of observation wells of TWAD have been analysed for Post-Monsoon and Pre-Monsoon. Since 1991, the years average Ground water level in m Below Ground Level for pre and post monsoon is as follows:

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 is as under.

Groundwater Potential as on March 2011 (as per CGWB):

Categorization of Firkas:

The status of Categorization of firkas as of March 2011 for the District is shown below.

Water supply status as on 1.4.2021

Rural Habitations

Total No. of Rural Habitations: 2210

Urban Towns ( Water supply status - 1.8.2019)