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Wednesday , 14th April 2021
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Nagapattinam District Profile

  • Nagapattinam district is bounded in the North by Cuddalore district, in the west by Thanjavur and Thiruvarur districts and in the south and east by the Bay of Bengal.
  • The District lies between 10º15’00 N to 11º 30' 00”N Latitude, 79º 30' 00”E to 79º 55' 00”E Longitude and has an aerial extent of 2377 sq.km.
  • There are 11 Blocks, 434 Villages and 2952 Habitations in the District.

Physiography and Drainage

The entire Nagapattinam district is a plain terrain with the slope less than 1%. The topographical slope is towards east and southeast.

  • The total length of the coast in the east and south is 225km.
  • The district area falls under two river basins namely Cauvery subbasin, and Vennar subbasin.
  • The district is drained by river like Kollidam and Cauvery in the North, Virasalar, Uppanar in the central part and Arasalar, T.R.Ar, Vettar Ar, Keduvai Ar, Pandavai Ar, Vedaranyam canal, Harichandranadi in the southern part of the district.
  • The district forms the delta part of river Kollidam and Cauvery.

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
1029.6 1415.0 1747.6 661.4 1629 1079.8 1392.6

Geology:

Rock Type Geological Formation
Sedimentary Rock Sand, Sandy Clay, Grey brown Sand, Marine Deposits

Hydrogeology:

Type of Aquifer Fairly thick discontinuous confined
aquifer fresh groundwater overlained by
saline water towards the coast
Depth of Water level 1 m to 8m

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) 159.16
Existing Gross Groundwater draft for all users (in MCM) 162.88
Stage of Groundwater development (in %) 102 %
Categorization of District Over -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 March 2013) No. of Firkas Firkas
Over Exploited (>100%) 11 Kuttalam, Manganallur,
Mayiladuthurai, Melaiyur, Palaiyur,
Pattavarthi, Puthur, Sembanarkoil,
Thiruvilaiyattam, Vaitheeswaran Koil, Sirkali
Critical (90%-100%) 1 Madhanam
Semi-Critical (70%-90%) 0  
Safe (<70%) 2 Manalmedu, Thiurkannapuram
Others (Poor& Saline) 17 Kangalancheri, Keelaiyur, Kilvelur,
Nagapattinam, Nirmulai, Thagatur,
Thalainayar, Therkupoigainallur,
Thevoor, Thillayadi, Thirukkuvalai,
Thirumarugal, Thiruvengdu, Valivalam,
Velanganni, Vedaranyam, Kariyapattinam
Total 31  
Water supply status as on 1.4.2018

Rural Habitations

Total No. of Rural Habitations: 2952

Partially covered 610(10-39 lpcd )
Fully covered 2342(10-39 lpcd )
QAH 169 

Urban Towns ( Water Supply Status - 1.8.2019)

S.N0 Name of Towns Population Present water supply level LPCD
Municipalities
1 Sirkali 34927 66
2 Nagapattinam 102905 90
3 Myiladuthurai 85632 99
4 Vedaranyam 34266 81
Town Panchayats
1 Vaitheeswarankoil 7676 87
2 Kuthalam 16125 75
3 Thittacheri 9245 102
4 Tharangambadi 23191 90
5 Manalmedu 9017 103
6 Velankanni 11108 70
7 Kilvelur 8272 99
8 Thalainayar 12798 105

Ground Water Level:

The Ground Water levels from the 26 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
2017

5 Years
Pre Monsoon
Average

5Years
Post Monsoon
Average

4.40

5.98

4.20

6.13

3.96

5.65

3.35

6.51

6.2

12.2

4.4 16.1 3.8 6.7

4.3

8.0