Krishnagiri District Profile
- Krishnagiri district is bounded by Vellore and Tiruvannamalai districts in the East, Karnataka State in the West, Andhra Pradesh State in the North and Dharmapuri District in the South.
- The District lies between 11º 12'N to 12º 49'N Latitude, 77º 27'E to 78º 38'E Longitude and has an areal extent of 5143 sq.km.
Physiography and Drainage:
- Krishnagiri district forms parts of Cauvery and Thenpennaiyar Rivers basins. Cauvery River forms the southwestern boundary of the district.
- Dodda Halla is the most important tributary of Cauvery draining the rugged terrain in the northwestern part of the district.
- Besides, Thenpennaiyar river is another major river draining the district. It originates from Nandhi hills in Karnataka, and enters Tamil Nadu and flows almost in a southeasterly direction.
- Pambar and Burgur Ar, are the important tributaries of Thenpennaiyar draining in the district.
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 | |
1145.6 | 510.4 | 730.0 | 798.6 | 985.4 | 985 |
Geology:
Rock Type | Geological Formation | ||||
Hard Rock | Charnockite, Granite, Pegamaite, Champion Gniess, Quartzite and Alluvium |
Ground Water Level:
The Ground Water levels from the 44 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 |
12.1 |
14.9 |
6.3 |
8.1 |
11.0 |
12.7 |
8.9 |
11 |
8.4 |
10.6 |
9.5 |
7.9 |
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 |
546 | 2 | 14 | 19 | 30 | 611 |
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%) | 12 | Alapatti, Bargur, Berigai, Guruparapalli, Kallavi, Mathur, Nagarasampatti, Palepalli, Samalpatti, Singarapettai, Uthangarai, Veppanapalli |
Critical (90%-100%) | 1 | Rayakottai |
Semi Critical (70%-90%) | 7 | Bagalur, Hosur, Kelamangalam, Krishnagiri, Mathigiri, Periyamuthur, Pochampalli |
Safe (<70%) | 9 | Andevanapalli, Anjetti, Barur, Denkankotta, Kakkadasam, Kaveripattinam, Shoolagiri, Thally, Uthanapalli. |
Others (Poor & Saline) | - | |
Total | 29 |
Rural Habitations
Total No. of Rural Habitations: 4653
Partially covered | 0 (10-39 lpcd ) |
Fully covered | 4653 (40 lpcd and above) |