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:

Geology:

Hydrogeology:

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):

Categorization of Firkas:

The status of Categorization of firkas as of March 2011 for the District is shown below.

Water supply status as on 1.4.2018

Rural Habitations

Total No. of Rural Habitations: 2952

Urban Towns ( Water Supply Status - 1.8.2019)

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: