Perambalur District Profile
- Perambalur district is bounded by Ariyalur district in the East, Cuddalore and Villuppuram districts in the northeast and north while in the northwest it is Salem District in the North West and Tiruchirapalli district in the west and south west directions.
- The District lies between 11°00’00’’ to 11°31’00’’ N latitude and 78°36’00’’ to 79°30’00’’ E longitude and has an areal extent of 1750 sq.km.
Physiography and Drainage:
- Perambalur district forms parts of Vellar and Cauvery basins.
- Vellar River flows through the northern boundary of the district while Chinnar River draining in the northern part of the district confluences with R.Vellar.
- The southern part of the district falls in the R.Cauvery basin with many small streams draining the district area.
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 | |
1005.5 | 533.2 | 747.3 | 1102.4 | 1563.4 | 985 |
Geology:
Rock Type | Geological Formation | ||||
Hard Rock 90% Sedimentary Rock 10% |
Gneiss, Charnockite, Limestone, Sandstone, Shale and Alluvium |
Ground Water Level:
The Ground Water levels from the 16 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 |
May |
Jan |
May |
Jan |
May |
Jan |
May |
Jan |
May |
5 Years |
5Years |
13.7 |
15.4 |
8.1 |
17.1 |
16.5 |
19.8 |
7.9 |
11.3 |
6.1 |
8.2 |
12.5 | 9.0 |
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.
Recharge Structures | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Check Dam | Percolation Pond | Recharge Pit | Recharge Trench | Others | Ooranies | Defunct Bore well Recharge | Recharge Shaft | Rooftop RWH | Hydro Fracturing | Total |
152 | 19 | 13 | 8 | 10 | 14 | 30 | 8 | 254 |
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%) | 7 | Chettikulam, Keelapuliyur, Kurumbalur, Pasumbalur, Perambalur, Valikandapuram, Vengalam |
Critical (90%-100%) | 0 | |
Semi Critical (70%-90%) | 1 | Koothur |
Safe (<70%) | 3 | Kolakanatham, Vadakkalur, Varagur |
Others (Poor & Saline) | 0 | |
Total | 11 |
Rural Habitations
Total No. of Rural Habitations: 630
Partially covered | 0 (10-39 lpcd ) |
Fully covered | 630 (40 lpcd and above) |