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• 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.
The average annual rainfall and the 5 years rainfall collected from IMD, Chennai is as follows:
Acutal Rainfall in mmNormal Rainfall in mm
Rock TypeGeological Formation
Hard RockCharnockite, Granite,
Pegamaite, Champion Gniess,
Quartzite and Alluvium
Type of aquifer Discontinous unconfined to semi confined aquifers in fissured formations.
Aquifer parameters
Well yield lpm: 36 – 1125
Transmissivity (T)(m 2/day)8 – 73
Transmissivity (T)m 2/day8 – 73
Permeability (K)m/day: 0.78 - 23
Depth of Water level8m to 25m
 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. Since 1991,average Ground water level in m Below Ground Level for pre and post monsoon is as follows:
Jan 2012 May 2012 Jan 2013 May 2013 Jan 2014 May 2014 Jan 2015 May 2015 Jan 2016 May 2016 5 Years Pre Monsoon Average 5Years Post Monsoon Average
7.60 8.43 8.20 13.58 17.10 21.27 14.43 28.50 9.05 12.85 16.92 11.28
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 is as under.
Recharge Structures
Check Dam Percolation Pond Recharge Pit Recharge Trench Others Ooranies Defunct Bore well Recharge Recharge Shaft Roof top RWH Hydro Fracturing Total
546 2 14 19 30 611
 Groundwater Potential as on March 2011 (as per CGWB):
Net Groundwater Availability (in MCM)354.94
Existing Gross Groundwater draft for all users (in MCM)471.44
Stage of Groundwater development (in %)133 %
Categorization of DistrictOver -Exploited
 Categorization of Firkas:
The status of Categorization of firkas as of March 2011 for the District is shown below.
Categorisation based on Extraction (as on 2011) No. of Firkas Firkas
Over Exploited (>100%) 12 Alapatti, Bargur, Guruparapalli, Kallavi,
Krishnagiri, Mathur, Palepalli,
Pochampalli, Samalpatti,
Singarapettai, Uthangarai, Veppanapalli
Critical (90%-100%) 1 Hosur
Semi Critical (70%-90%) 8 Barur, Berigai, Mathigiri
Nagarasampatti, Periyamuthur,
Rayakottai, Shoolagiri, Uthanapalli
Safe (<70%) 8 Andevanapalli, Anjetti, Denkankotta, Kelamangalam,
Kakkadasam, Mathigiri, Thally, Kaveripattinam
Others (Poor& Saline) -
Total 29
Water supply status as on 1.4.2017
 Rural Habitations
Total No. of Rural Habitations: 4653
Partially covered0 (10-39 lpcd )
Fully covered4653 (40 lpcd and above)
 Urban Towns (Water supply status - Sep 2016)
S.NOName of Towns Population Present water supply level LPCD
1Krishnagiri 71323 90
2Hosur 116821 90
Town Panchayats
1 Denkanikottai 24252 80
2 Kaveripattinam 15006 85
3 Bargur 16366 85
4 Nagojanahalli 9953 70
5 Uthangarai 18470 70
6 Kelamangalam 13321 70
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