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Wednesday , 14th April 2021
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Ariyalur District Profile

Ariyalur district has been carved out of Perambalur district and is bounded by the districts of Cuddalore in the north and north-east, Nagapattinam in the east, Thanjavur in the south and south-east, Tiruchirapalli in the south-west and Perambalur in the west.

The district lies between 10°53’00’’ to 11°26’00’’ Northern latitude and 78°56’00’’ to 79°31’00’’ Eastern longitude and has an areal extent of 1,944 sq.km.

There are 6 Blocks, 201 Villages and 1574 Habitations in the District.

Physiography and Drainage

  • Ariyalur district forms parts of Vellar and Cauvery Rivers basins.
  • Cauvery River fringes the southern boundary of the district. River Vellar drains in the northern part and River Marudaiyar flowing in the south confluences with R.Coleroon as a tributary.

Rainfall:

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

Actual Rainfall in Mm Normal Rainfall in Mm
2013 2014 2015 2016 2017 2018
667.6 698.9 1058.8 536.7 1193.2 814.5 1071.8

Geology:

Aquifer parameters Alluvium Sedimentary Hard Rock
Well yield in lpm 300-950 300-550 80-210
Transmissivity (T) m 2/day 225-1500 90-190 35-130
Permeability (K) m/day 20-50 15-30 5-20
Depth of water level 3m to 15m

Ground Water Level:

The Ground Water levels from the 27 number of observation wells of TWAD have been analyzed for Post-Monsoon and Pre-Monsoon. Since 1991, the average Groundwater level in m Below Ground Level for pre and post-monsoon is as follows:

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 in district is as under.

WGroundwater Potential as on March 2011 (as per CGWB)

Net Groundwater Availability (in MCM) 314.97
Existing Gross Groundwater draft for all users (in MCM) 161.52
Stage of Groundwater development (in %) 51 %
Categorization of District Safe

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%) -  
Critical (90%-100%) 0  
Semi Critical (70%-90%) 2 Sendurai,suthamalli
Safe (<70%) 13 Andimadam, Ariyalur, Elakurichi,
Jayankondam, Keelapalur, Kundaveli,
Kuvagam, Mathur, Nanmangalam,
Ponparappi, T. Palur, Thirumanur,
Udayarpalayam
Others (Poor& Saline) -  
Total 15  
Water supply status as on 1.4.2018

Rural Habitations

Total No. of Rural Habitations : 1573

Partially covered 0 (10-39 lpcd )
Fully covered 1573 (40 lpcd and above)

Urban Towns (Water supply status - on 1.4.2018)

S.NO Name of Towns Population Present water supply level LPCD
Municipalities
1 Jeyakondam 33945 88
2 Ariyalur 28902 88
Town Panchayats
1 Udayarpalayam 12688 70
2 Varadarayanpettai 8259 70

Ground Water Level:

The Ground Water levels from the 27 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

13.90

23.60

21.20

25.40

23.57

25.60

23.05

28.70

28.76

31.7

25.0

31.3

26.9

30.0

23.2

28.0