TAMILNADU WATER SUPPLY AND DRAINAGE BOARD


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DISTRICT PROFILE

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Ariyalur District Profile

ARIYALUR DISTRICT PROFILE

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SALIENT DETAILS
Profile	Location	Inland district of the State
	Lat.	N 10° 53' to 11° 26'
	Long.	E 78° 56' to 79° 31'
	Area	1944 sq. Kms
	No.of Taluks	3
	No. of Blocks	6
	No. of Villages	201
	No. of Habitations	1407

Physiographic	Type of Terrain	plain topography with residual hills. Maximum height of Pachamalai hill: 992
	Elevation in m amsl	Pachamalai, Semmalai
	Hills	Vellar, Kollidam
	River
	Tributaries	Kallar, Chinnar, Ellarodai, Elumur, Marudaiyar
Average annual Rainfall		1096 mm
Climate		Sub-Tropical
Temperature		Max: 40 – 44 Min: 26 – 30
River Basin		Cauvery
Geology		Hard rock and sedimentary formations represented by Cretaceous

Hydrogeology	Type of aquifer	Water Table to Semi confined conditions.
	Aquifer parameters	Alluvium Sedimentary Sedimentary
	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		3 m to 15m

GROUND WATER POTENTIAL AS ON JANUARY 2003 (AS PER CGWB & PWD)

( Based on Ground Water Estimation Committee report)
Utilizable ground water recharge	425.75MCM
Net Ground Water draft	191.84MCM
Balance	230.43MCM
BLOCKS WITH STAGE OF GROUNDWATER DEVELOPMENT ( As on March 2004 )
OVER EXPLOITED Greater than 100%	Nil
CRITICAL Between 90 and 100%	Nil
SEMI CRITICAL 70 and 90%	Nil
SAFE Less than 70%	Ariyalur Andimadam Jayamkondam Sendurai Thirumanur T.Palur
SALINE	Nil
RECHARGE STRUCTURES
Check Dams:	49
Oorani:	09
Recharge Trench:	03

Water supply status as on 1.4.2011

Rural Habitations

Total No. of Rural Habitations:1408

Partially covered	338 (10-39 lpcd )
Fully covered	1070 (40 lpcd and above)

Urban Towns

S.NO	Name of Towns	Population	Present water supply level LPCD
Municipalities
1	Jeyakondam	31268	83
2	Ariyalur	27822	84
Town Panchayats
1	Udayarpalayam	11320	70
2	Varadarayanpettai	8575	65