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Monday , 29th November 2021
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Nagapattinam District Profile

  • Nagapattinam district is bounded in the North by Karaikal in Pondicherry state and Thiruvarur district, in the west by Thiruvarur districts and in the south and east by Bay of Bengal.
  • The District lies between 10º 15’ 00”N to 10º 54' 00”N Latitude, 79º 39' 00”E to 79º 55' 00”E Longitude and has an aerial extent of 1205 sq.km.

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 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 135km.
  • The district area falls under two river basin namely Vennar sub basin and New Delta sub basin.
  • The district is drained by river like Arasalar, Tirumalai Rajanaru, Vettararu, Keduvaiaru, Pandavaiaru, Vedaranyam canal and Harichandranadi.
  • The district forms the delta part of river Cauvery.

Geology:

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

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
2015 2016 2017 2018 2019
1747 661 1393.3 1079.8 1456.4 1393.3

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

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:

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

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

2.2

3.5

1.7

4.1

3.7

5.3

2.8

4.3

2.6

2.5

3.9

2.6

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.

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 2017 for the District in is shown below.

Categorisation based on Extraction (as on 2017) No. of Firkas Firkas
Over Exploited (>100%) 0 -
Critical (90%-100%) 0 -
Semi Critical (70%-90%) 0  
Safe (<70%) 0 -
Others (Poor& Saline) 16 Kangalancheri, Kariyapattinam, Keelaiyur, Kilvelur,
Nagappattinam, Nirmulai, Thagatur, Thalainayar,
Therkupoigainallur, Thevoor, Thiurkannapuram,
Thirukkuvalai, Thirumarugal, Valivalam,
Vedaranyam, Velanganni
Total 16  
Water supply status as on 1.4.2021

Rural Habitations

Total No. of Rural Habitations: 2054

Partially covered 1984 (10-39 lpcd )
Fully covered 70 (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