Tiruchirapalli

Monday, 31 March 2025

State District Profile
Tiruchirapalli

State District profile

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Tiruchirappalli District Profile

Tiruchirappalli district is one of the inland districts in the State and lies in the Central Part of the State.
The district is bounded by Perambalur District in the North and Ariyalur District in the Northeast and Karur District in the West and Thanjavur District in the East.
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.

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, Ponnanai AR, 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:

Actual Rainfall in mm					Normal Rainfall in mm
2017	2018	2019	2020	2021	Normal Rainfall in mm
690.0	506.6	635.0	796.6	1222.7	985

Geology:

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

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 2017	May 2017	Jan 2018	May 2018	Jan 2019	May 2019	Jan 2020	May 2020	Jan 2021	May 2021	5 Years Pre Monsoon Average	5Years Post Monsoon Average
15.1	18.5	15.7	19.1	20.6	23.1	19.8	22.5	18.3	20.7	17.6	15.2

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 in district 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

Categorization of Firkas:

The status of Categorization of firkas as of March 2020 for the District in is shown below.

Categorisation based on Extraction (as on 2020)	No. of Firkas	Firkas
Over Exploited (>100%)	17	Eragudi, Kannanur, Kariyamanickam, Koppampatti, Manapparai, Manikandam, Marungapuri, Pulivalam, Pannappatti, Sengattuppatti, Thathaiyangarpettai, Thumbalam, Thuraiyur, Thuvarangurichi, V.Periyapatti, Vaiyampatti, Valaieduppu
Critical (90%-100%)	1	Uppiliyapuram
Semi Critical (70%-90%)	8	Ealurpatti, Kattuputhur, Mannachanallur, Musiri, Peruvalpur, Sirugambur, Thottiyam, Valandau
Safe (<70%)	17	Aamur, Anbil, Andanallur, Kallakkudi, Kulumani, Lalgudi, Navalpattu, Pullambadi, Somarasanpettai, Srirangam, Tiruverumbur, Trichy(E)North, Trichy(E)South,Trichy(W)North, Trichy(W)South, Valadi, Vengur
Others (Poor & Saline)	0
Total	43

Rural Habitations

Total No. of Rural Habitations: 3340

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

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