Tiruchirapalli

Wednesday , 14th April 2021

State District Profile
Tiruchirapalli

State District profile

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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	Normal Rainfall in mm
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.

Recharge Structures
Check Dam	Percolation Pond	Recharge Pit	Recharge Trench	Others	Ooranies	Defunct Bore well Recharge	Recharge Shaft	Rooftop RWH	Hydro Fracturing	Total
264	3	1	3		5	3		28		307

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