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 |
May |
Jan |
May |
Jan |
May |
Jan |
May |
Jan |
May |
5 Years |
5Years |
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.
Recharge Structures | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Check Dam | Percolation Pond | Recharge Pit | Recharge Trench | Others | Ooranies | Defunct Bore well Recharge | Recharge Shaft | Rooftop RWH | Hydro Fracturing | Total |
110 | 3 | 9 | 10 | 132 |
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) |