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Wednesday , 14th April 2021
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Namakkal District Profile

  • Namakkal district is bounded by Tiruchirappalli district in the East, Erode district in the West and Salem district in the North and Karur district in the South.
  • The District lies between 11º 00'00”N to 11º 34’ 48”N Latitude, 77º 40'15”E to 78º 29' 30”E Longitude and has an areal extent of 3404 sq.km.
  • There are 15 Blocks, 322 Villages and 3936 Habitations in the District.

Physiography and Drainage

  • Namakkal district is characterized by undulating terrain with isolated hillocks, which are part of Eastern Ghats.
  • Kolli hills range is the important hill in the district. The general slope of the area is towards south and southeast.
  • Most of the southern part of the district is drained by Cauvery and its tributary Thirumanimuttar.

Rainfall:

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

Acutal Rainfall in mm Normal Rainfall in mm
2013 2014 2015 2016 2017 2018
622.30 589.30 818.6 388.2 783.7 649.3 793.4

Geology:

Rock Type Geological Formation
Hard Rock Charnockite, Gneiss, Pegmatite, Granite, Alluvium

Hydrogeology:

Type of Aquifer Discontinuous unconfined to semi
confined aquifers in fissured
formations
Aquifer parameters  
Well yield in lpm 23 - 553
Transmissivity (T) m 2/day 9 - 25
Permeability (K) m/day 0.26 - 1.63
Depth of Water level 22m to 30m

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):

Net Groundwater Availability (in MCM) 491.73
Existing Gross Groundwater draft for all users (in MCM) 439.84
Stage of Groundwater development (in %) 89 %
Categorization of District Semi-Critical

Categorization of Firkas:

The status of Categorization of firkas as of March 2013 for the District is shown below.

Categorisation based on Extraction (as on March 2013) No. of Firkas Firkas
Over Exploited (>100%) 20 Erumaipatti, Kalappanaikanpatti, Alanganatham
Mallasamudram, Mangalapuram,
Mohanur, Mullukurichi, Nallipalayam,
Nallur, Namagiripettai, Namakkal, Pandamangalam
Paramathi, Puduchatram, Rasipuram,
Sellappampatti, Senthamagalam,
Vaiyappamalai, Valaiyapatti, Vennandur.
Critical (90%-100%) 2 Elachipalayam,Pallapatti
Semi Critical (70%-90%) 5 Jedarpalayam,
Kumarapalayam, Manickampalayam,
Molasi, Thirchengodu
Safe (<70%) 3 Pallipalayam,
Thirupuli Nadu, Valavanthi nadu.
Others (Poor& Saline) -  
Total 30  
Water supply status as on 1.4.2018

Rural Habitations

Total No. of Rural Habitations: 3936

Partially covered 622 (10-39 lpcd )
Fully covered 3314 (40 lpcd and above)

Urban Towns ( Water Supply Status - 1.7.2019)

S.No Name of Towns Population Present water supply level LPCD
Municipalities
1 Rasipuram 50244 110
2 Kumarapalayam 71594 90
3 Namakkal 55145 94
4 Thiruchengodu 95335 97
5 Pallipalayam 40140 92
Town Panchayats
1 Alampalayam 20286 91
2 Mallasamudram 18007 70
3 Vennanthur 14568 72
4 Pillanallur 11181 79
5 Pothanur 18455 70
6 Paramathi 11986 73
7 Venkarai 9330 71
8 Pandamangalam 7259 62
9 Velur 25012 68
10 Sendamangalam 19750 78
11 Mohanur 14315 101
12 Namagiripettai 21250 85
13 Athanur 9827 64
14 Erumaipatti 12085 123
15 Padaveedu 10451 101
16 Kalappanaickenpatty 10831 84
17 Seerapalli 12403 121
18 Pattinam 8912 79
19 R.Pudupatti 7478 100

Ground Water Level:

The Ground Water levels from the 34 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
2013

May
2013

Jan
2014

May
2014

Jan
2015

May
2015

Jan
2016

May
2016

Jan
2017

May
2017

Jan
2018
May
2018
Jan
2019
May
2019

5 Years
Pre Monsoon
Average

5Years
Post Monsoon
Average

6.50

9.02

8.50

12.70

8.54

10.16

5.85

8.37

11.09

15.4

6.9 8.9 10.0 14.0

8.2

10.8