Thiruvarur District Profile

• Thiruvarur district is bounded on the north by Nagapattinam district, on the south by Palk strait, on the east by Pondicherry (Karaikkal part) and Nagapattinam district and on the west and north-west by Thanjavur district.
• The District lies between 10º 10'00”N to 11º 01'00”N Latitude, 79º 13'00”E to 79º 43'00”E Longitude and has an aerial extent of 2417 sq.km.
• There are 10 Blocks, 431 Villages and 2977 Habitations in the District

Physiography and Drainage

• Thiruvarur district is a plain terrain with a gentle slope towards the east in the northern and central part and towards the south in the southern part.
• The maximum surface elevation is about 30.0m in the western part of the district.
• The district area falls under three river basins namely Cauvery sub-basin, Vennar sub-basin and new delta area.
• The district is irrigated and drained by the rivers Vennar, Vettar, Mudikondan, and Arasalar etc.

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 19 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 enhancing the Sustainability of the drinking water sources, recharge structures are being implemented by TWAD Board under various State and Central Government assistance.

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 2013 for the District is shown below.

Water supply status as on 1.4.2021

Rural Habitations

Total No. of Rural Habitations: 1704

Urban Towns ( Water supply status - 1.8.2019)