8/21/2019 | TWAD

Nagapattinam District Profile

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, is as follows:

Acutal Rainfall In Mm Normal Rainfall 2013 2014 2015 2016 2017 In Mm

1029.6 1415.0 1747.6 661.4 1629 1392.6

 Geology:

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Rock Type Geological Formation

Sedimentary Rock Sand, Sandy Clay, Grey brown Sand, Marine Deposits

 Hydrogeology:

Fairly Thick Discontinuous Confined Type Of Aquifer Fresh Groundwater Aquifer Overlained By Saline Water Towards The Coast

Depth Of Water 1 M To 8m Level

 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.

Recharge Structures

Defunct Check Percolation Recharge Recharge Recharge Rooftop Hydro Others Ooranies Bore Well Total Dam Pond Pit Trench Shaft RWH Fracturing Recharge

10 91 5 119 46 271

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

Net Groundwater Availability (In MCM) 159.16

Existing Gross Groundwater draft for all 162.88 users (in MCM)

Stage of Groundwater development (in 102 % %)

Over - Categorization of District Exploited

 Categorization of Firkas:

The status of Categorization of firkas as of March 2011 for the District is shown below. https://www.twadboard.tn.gov.in/content/nagapattinam 2/5 8/21/2019 Nagapattinam | TWAD

Categorisation Based On Extraction (As No. Of Firkas On March 2013) Firkas

Kuttalam, Manganallur, , Melaiyur, Palaiyur, Over Exploited (>100%) 11 Pattavarthi, Puthur, , Thiruvilaiyattam, , Sirkali

Critical (90%-100%) 1 Madhanam

Semi-Critical (70%-90%) 0

Safe (<70%) 2 Manalmedu, Thiurkannapuram

Kangalancheri, Keelaiyur, Kilvelur, Nagapattinam, Nirmulai, Thagatur, Thalainayar, Therkupoigainallur, Others (Poor& Saline) 17 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 298 (10-39 Lpcd )

Fully covered 2485 (10-39 lpcd )

QAH 169

 Urban Towns ( Water Supply Status - 1.4.2018)

S.N0 Name Of Towns Population Present Water Supply Level LPCD

Municipalities

1 Sirkali 34927 66 https://www.twadboard.tn.gov.in/content/nagapattinam 3/5 8/21/2019 Nagapattinam | TWAD

2 Nagapattinam 102905 90

3 Myiladuthurai 85632 80

4 Vedaranyam 34266 81

Town Panchayats

1 Vaitheeswarankoil 7676 87

2 16125 75

3 Thittacheri 9245 102

4 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:

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5 Years 5Years Jan May Jan May Jan May Jan May Jan May Pre Post 2013 2013 2014 2014 2015 2015 2016 2016 2017 2017 Monsoon Monsoon Average Average

4.40 5.98 4.20 6.13 3.96 5.65 3.35 6.51 6.2 12.2 6.59 4.41

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