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Ariyalur District Profile

  • The Ariyalur district was carved out of Perambalur district and is bordered by the districts of Cuddalore in the north and north-east, Nagapattinam in the east, Thanjavur in the south and south-east, Tiruchirapalli in the south-west and Perambalur in the west.
  • The district lies between 10°53’00’’ to 11°26’00’’ Northern latitude and 78°56’00’’ to 79°31’00’’ Eastern longitude and has an areal extent of 1,944 sq.km.

Physiography and Drainage:

  • Ariyalur district forms parts of Vellar and Cauvery Rivers basins.
  • Cauvery River forms the southern boundary of the district, River Vellar drains in the northern part and River Marudaiyar flowing in the south and confluence with R.Coleroon a tributary of R. Cauvery.

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
1193.2 814.5 1111.4 1064.4 1646.1 985

Geology:

Rock Type Geological Formation
Sedimentary Rock 90%
Hard Rock 10 %
Limestone, Sandstone, Conglomerate, Alluvium, Black Clay Charnockete and Gneiss

Ground Water Level:

The Groundwater levels from the 27 number of observation wells of TWAD have been analyzed 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

28.8

31.7

25.0

31.3

26.9

30.0

26.1

29.1

24.6

27.9

25.2 22.2

Sustainability:

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

The Recharge Structures implemented so far in the district are 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%) -  
Critical (90%-100%) -  
Semi Critical (70%-90%) 1 Sendurai
Safe (<70%) 14 Andimadam, Ariyalur, Elakurichi, Jayamkondam, Keelapalur, Kundaveli, Kuvagam,
Mathur, Nanmangalam, Ponparappi, Suthamalli, T.Palur, Thirumanur, Udayapalayam
Others (Poor & Saline) -  
Total 15  

Rural Habitations

Total No. of Rural Habitations : 1573

Partially covered 0 (10-39 lpcd )
Fully covered 1573 (40 lpcd and above)