Section: State-district-profile pages are not under access control

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.

Physiography and Drainage:

  • Thiruvarur district is a plain terrain with a gentle slope towards east in the northern and central part and towards 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, Mudikondam, and Arasalar etc.

Rainfall:

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

Actual Rainfall in mm Normal Rainfall in mm
2017 2018 2019 2020 2021
1247.9 971.6 1128.6 1303.7 1796.2 985

Geology:

Rock Type Geological Formation
Sedimentary Rock Laterite, Sand and Silt, Sandstone, Alluvium and Marine deposit

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. 5 years average Ground water level in m Below Ground Level for pre and post monsoon is as follows:

Jan
2017

May
2017

Jan
2018

May
2018

Jan
2019

May
2019

Jan
2020

May
2020

Jan
2021

May
2021

5 Years
Pre Monsoon
Average

5Years
Post Monsoon
Average

15.3

19.1

13.8

18.2

12.9

15.8

9.1

13.6

5.4

11.2

13.4 10.0

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.

Categorisation based on Extraction (as on 2020) No. of Firkas Firkas
Over Exploited (>100%) 10 Agarathirumalam, Alangudi, Avoor, Kodavasal, Koradacheri,
Kulikkarai, Peralam, Thirukkannamangai, Thiruvizhimazhalai, Valangaiman
Critical (90%-100%) 1 Vadapathimangalam
Semi Critical (70%-90%) 3 Koothanallur, Nannilam, Sannanallur
Safe (<70%) 9 Kottur, Kunniyur, Mannargudi, Nidamangalam, Palaiyur,
Thalaiyamangalam, Thiruvarur, Ullikottai, Vaduvur
Others (Poor & Saline) 4 Alathampadi, Edaiyur, Muthupet, Thiruthuraipoond
Total 27  

Rural Habitations

Total No. of Rural Habitations: 2952

Partially covered 0 (10-39 lpcd )
Fully covered 2952 (40 lpcd and above)