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Wednesday , 14th April 2021
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Tiruchirapalli District Profile

  • Tiruchirappalli district is one of the inland districts in the State and lies in the Central Part of the State.
  • The District lies between 10º 17' to 11º 25'N Latitude, 78º 09'to 79º 03'E Longitude and has an areal extent of 4511 sq.km.
  • There are 14 Blocks, 404 Villages and 3340 Habitations in the District.

Physiography and Drainage

  • Most of the District is a pediplain with a general slope towards the central part where River Cauvery and Coleroon flow.
  • The entire district falls in Cauvery Basin and drained by River Cauvery and its tributaries like Ayyar, Uppar, and partly by Maruthaiyar, Ponnanaiyar, Koraiyar and partly by Vellar River System.
  • There are small residual hills scattered in western and southern part of the district, prominent among them, is Rock Fort hill, located in the heart of Tiruchirappalli town.

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
522.90 535.70 862.0 474.5 690 506.6 818.0

Geology:

Rock Type Geological Formation
Hard Rock 95%,Sedimentary Rock 5% Charnockite, Gneiss, Granite,Quartzite, Pegmatite, Sandstone,Shale, Limestone, Alluvium

Hydrogeology:

Type of Aquifer Water Table to Semi confined conditions
Aquifer parameters Alluvium Cretaceous Hard rock
Well yield in lpm 10 - 20 1.1 -3.5 1 - 2
Transmissivity (T)m2/day 49 - 216 33 - 782 32 - 80
Permeability (K)(m/day)) 2 - 5 10 - 66 5 - 10
Specific capacity. (lpm/md) 7.2 0.3 - 2.56 0.8 - 2.5
Depth of Water level 3 m to 15m

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 is as under.

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

Net Groundwater Availability (in MCM) 725.60
Existing Gross Groundwater draft for all users (in MCM) 571.15
Stage of Groundwater development (in %) 79 %
Categorization of District Semi Critical

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%) 13 Kannanur, Kariyamanickam, Thuvarangurichi
Koppampatti, Manikandam,
Marungapuri, Pulivalam,
Thathaiyangarpettai,
Thumbalam, Thuraiyur, kattuputhur,
Vaiyampatti, Valaieduppu.
Critical (90%-100%) 7 Peruvalpur, Eragudi, Manapparai, Pannapatti, Thottiyam, V.Periyapatti, Sengattupatti
Semi Critical (70%-90%) 5 Mannachanallur,Musiri, Ealurpatti, Uppiliapuram, Sirugambur
Safe (<70%) 16 Aamur, Anbil, Andanallur, Kallakkudi,
Kulumani, Lalgudi, Navalpattu,
Pullambadi,
Vengur, Somarasanpettai, Srirangam,
Tiruverumbur, Trichy north, Trichy
south, Valadi, Valandau.
Others (Poor& Saline) -  
Total 41  
Water supply status as on 1.4.2018

Rural Habitations

Total No. of Rural Habitations: 3340

Partially covered 229(10-39 lpcd )
Fully covered 3111(40 lpcd and above)

Urban Towns ( Water supply status - 1.8.2019)

S.No Name of Towns Population Present water supply level LPCD
Corporation
1 Tiruchirappalli 847387 134.16
Municipalities
1 Thuraiyur 32439 90
2 Manapparai 40510 89
3 Thuvakudi 38887 87
Town Panchayats
1 Balakrishnampatti 8635 78
2 Kallakudi 11604 84
3 Kattuputhur 10933 73
4 Koothappar 15943 94
5 Lalgudi 23740 80
6 Manachanallur 25931 85
7 Mettupalayam 7681 87
8 Musiri 28727 71
9 Ponnampatti 12167 72
10 Pullampadi 10241 89
11 Puvalur 7905 73
12 S. Kannanur 13073 86
13 Sirugamani 10743 82
14 Thathaiyangarpet 12980 83
15 Thottiyam 14909 92
16 Uppiliapuram 7705 72

Ground Water Level:

The Ground Water levels from the 45 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

10.60

13.42

11.00

13.87

13.87

11.87

3.11

12.03

15.08

13.9

15.7 19.1 20.5 23.1

12.8

16.0