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.
• There are 10 Blocks, 333 Villages and 4678 Habitations in the District.

Physiography and Drainage

• Krishnagiri district forms parts of Cauvery and Pennaiyar 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.
• Ponnaiyar 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 Ponnaiyar draining in the district.

Geology:

Rainfall:

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

Hydrogeology:

Ground Water Level:

The Ground Water levels from the 44 number of observation wells of TWAD have been analyzed for Post-Monsoon and Pre-Monsoon. Since 1991, the average Groundwater level in m Below Ground Level for pre and post-monsoon is as follows:

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

Sustainability:

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

The Recharge Structures implemented so far is as under.

Groundwater Potential as on March 2011 (as per CGWB):

Categorization of Firkas:

The status of Categorization of firkas as of March 2011 for the District is shown below.

Water supply status as on 1.4.2021

Rural Habitations

Total No. of Rural Habitations: 3983

Urban Towns ( Water supply status - 1.4.2017)