TAMILNADU WATER SUPPLY AND DRAINAGE BOARD

Coimbatore District Profile

COIMBATORE DISTRICT PROFILE

• Coimbatore district is bounded by Kerala State in the West and South, Tiruppur District in the East, and parts of Nilgiris and Erode Districts in the North.

• The District lies between 10º 13'00” N to 11º 23' 30”N Latitude, 76º 39'00”E to 77º 30'00”E Longitude and has an areal extent of 7649 sq.km.

• There are 12 Blocks, 228 Village panchayats and 2238 Habitations in the District'

Physiography and Drainage:
• The North western part and the Southern part of the Coimbatore is occupied by hill ranges of Western Ghats, namely Nilgiris hills in the North-West and Anamalai hills in the South.
• The most part of the district forms parts of Cauvery river basin where as the South western part of the district comes under Ponnani River basin.
• The major river courses which come under Cauvery basin are Bhavani, Noyyal and Amaravathi.
• The South western part of the district is drained by tributaries of Ponnani, namely Palar, Aliyar and Uppar originating from Anamalai hills.

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	Normal Rainfall in mm
901.0	1221.7	992.9	505.5	873.4	689.04

Geology::

Rock Type			Geological Formation
Hard Rock			Charnockite, Sillimanite Gneiss, Granite, Pyroxenite Calc.Granulites Quartzite and Alluvium

Hydrogeology:

Type of aquifer	Semi confined to unconfined aquifers
Aquifer parameters Yield	50 to 300 lpm
Transmissivity (T):	1.49; 164.18 m2/day
Permeability (K):	0.25; 26.75 m/day
Depth of Water level	7m to 25m

Ground Water Level::

The Ground Water levels from the 38 number of observation wells of TWAD have been analysed for Post-Monsoon and Pre-Monsoon. Since 1991, average Ground water level in m Below Ground Level for pre and post monsoon is as follows

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	Roof top RWH	Hydro Fracturing	Total
239	50				3	5	110	40	0	477

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

Net Groundwater Availability (in MCM)	438.81
Existing Gross Groundwater draft for all users (in MCM)	506.15
Stage of Groundwater development (in %)	115
Categorization of District	Over -Exploited

Categorization of Firkas:

The status of Categorization of Firkas as of March 2013 for the District in is shown below.

Categorisation based on Extraction (as on March 2013))	No. of Firkas	Firkas
Over Exploited (>100%)	22	Annur(N), Anupparpalayam, Coimbatore South, Ganapathi, Karumathampatti, Kinathukatavu, Kolarpatti, Kovilpalayam, Perianaickenpalayam, Perianegamam, Perur, Pollachi(N), Pollachi(S), Ramapattinam, Selakkarichal, Singanallur, Sulur, Thondamuthur, Thudialur, Vadachittur, Varapatti,ottakkal Mandabam
Critical (90%-100%)	2	Anur,Sarkar Samakulam
Semi Critical (70%-90%)	18	Alandurai, Karamadai, Kottur, Madukkarai, Marchinaickenpalayam, perur, Mettupalayam, Saravanampatti
Safe (<70%)	2	Anamalai, Valparai
Others (Poor& Saline)	-
Total	33

Water supply status as on 1.4.2017

Rural Habitations

Total No. of Rural Habitations: 2238

Partially covered	210 (10-39 lpcd )
Fully covered	2028 (40 lpcd and above)

Urban Towns ( Water supply status - 1.4.2017)

S.NO	Name of Towns	Population	Present water supply level LPCD
Corporations
1	Coimbatore	1050721	128
Municipalities
1	Mettupalayam	69213	125
2	Pollachi	90180	104
3	Valparai	70859	122
Town Panchayats
1	Gudalur	38859	137
2	Narasimhanaickenpalayam	17858	213
3	Sarkarsamakulam	10289	189
4	Edikarai	8686	165
5	No.4 Veerapandi	16953	183
6	Karumathampatti	35062	80
7	Karamadai	35166	153
8	Anaimalai	17208	74
9	Dhaliyur	11500	94
10	Periyanaickenpalayam	25930	123
11	Annur	20079	181
12	Pallapalayam	11910	181
13	Erugur	25691	156
14	Vellalur	24872	150
15	Kannampalayam	15868	176
16	Madukarai	30357	131
17	Othakalmandapam	12207	100
18	Sulur	27909	142
19	Thirumalaiyanpalayam	12164	85
20	Ettimadai	9352	202
21	Sirumugai	18223	99
22	Zamin Uthukuli	14859	132
23	Odaiyakulam	11999	133
24	Vettaikaranpudur	17392	137
25	Kottur	26627	138
26	Perur	8004	76
27	Chettipalayam	10366	113
28	Thondamuthur	11492	101
39	Vedapatti	11658	121
30	Puluvapatti	12853	110
31	Kinathukadavu	8653	99
32	Sooleswaranpatti	20104	90
33	Periyanagamam	7098	105
34	Mupperipalayam	10923	127
35	Samathur	5672	92
36	Thenkarai	7349	85
37	Alandurai	7221	91