The Amaravati River is a tributary of Kaveri River

Kaveri River

The Kaveri , also spelled Cauvery in English, is a large Indian river. The origin of the river is traditionally placed at Talakaveri, Kodagu in the Western Ghats in Karnataka, flows generally south and east through Karnataka and Tamil Nadu and across the southern Deccan plateau through the...

 in Coimbatore District

Coimbatore District

Coimbatore District is one of the more affluent and industrially advanced districts of the state of Tamil Nadu in India. Coimbatore is known as the Manchester of South India. It one of the most industrialized towns of Tamil Nadu. It has the highest GDP among the districts of Tamil Nadu, even ahead...

, Tamil Nadu

Tamil Nadu

Tamil Nadu is one of the 28 states of India. Its capital and largest city is Chennai. Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Pondicherry, and the states of Kerala, Karnataka, and Andhra Pradesh...

 state, South India

South India

South India is the area encompassing India's states of Andhra Pradesh, Karnataka, Kerala and Tamil Nadu as well as the union territories of Lakshadweep and Pondicherry, occupying 19.31% of India's area...

. It is continuation of the Pambar

Pambar River

The Pambar River originates in the Anaimudi Hills in Idukki District of Kerala state in South India.-Route:It traverses Turner’s Valley in Eravikulam National Park and flows into the Chinnar Wildlife Sanctuary through the Taliar Valley between Kanthalloor and Marayoor Villages and eastwards through...

 and Chinnar

Chinnar River

The Chinnar River originates in the Annaimalai Hills below a grassy pass between the hills Kumarikal Malai and Kaladekatti Malai In Idukki District, Kerala state South India...

 rivers in Kerala

Kerala

or Keralam is an Indian state located on the Malabar coast of south-west India. It was created on 1 November 1956 by the States Reorganisation Act by combining various Malayalam speaking regions....

.

Route

The 175 km long Amaravati River begins at the Kerala

Kerala

or Keralam is an Indian state located on the Malabar coast of south-west India. It was created on 1 November 1956 by the States Reorganisation Act by combining various Malayalam speaking regions....

/Tamil Nadu

Tamil Nadu

Tamil Nadu is one of the 28 states of India. Its capital and largest city is Chennai. Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Pondicherry, and the states of Kerala, Karnataka, and Andhra Pradesh...

 border at the bottom of Manjampatti Valley

Manjampatti Valley

Manjampatti Valley is a protected area in the eastern end of Indira Gandhi Wildlife Sanctuary and National Park in Coimbatore District, Tamil Nadu, South India. It is a pristine drainage basin of shola and montane rain Forest with high biodiversity recently threatened by illegal land clearing...

 between the Annamalai Hills and the Palni Hills

Palni Hills

The Palni Hills are a mountain range in Tamil Nadu state of South India. The Palni Hills are an eastward extension of the Western Ghats ranges, which run parallel to the west coast of India. The Palni Hills adjoin the high Anamalai range on the west, and extend east into the plains of Tamil Nadu,...

 in Indira Gandhi Wildlife Sanctuary and National Park. It descends in a northerly direction through Amaravathi Reservoir

Amaravathi Reservoir

Amaravathi Reservoir at Amaravathinagar, south on SH 17 from Udumalpet, is located in Indira Gandhi Wildlife Sanctuary and National Park in Tirupur district, Tamil Nadu, India. The reservoir was created by the steep Amaravathi Dam built across the Amaravathi River. Amaravathi river is tributary...

 and Amaravathi Dam

Amaravathi Dam

Amaravathi Dam at Amaravathinagar, 25 km south on NH 17 from Udumalpet, is located in Indira Gandhi Wildlife Sanctuary in Coimbatore district, Tamil Nadu, India. The 9.31 km², 33.53 m deep Amaravathi Reservoir was created by this steep dam. It was built primarily for irrigation and flood...

 at Amaravathinagar

Amaravathinagar

Amaravathinagar is a village in the foothills of Annamalai Hills in Coimbatore district, Tamil Nadu, India; 17.6 km south on SH 17 from Udumalpet and around 90 km from Coimbatore city...

. It is joined by the Kallapuram River at the mouth of the Ajanda valley in Udumalaipettai

Udumalaipettai

Udumalai also known as Udumalpet is a town and a municipality in Tirupur district, Indian state of Tamil Nadu. Poor Man's Ooty, as it is called, the Udumalpet town is one of the famous summer resorts of Tamil Nadu, surrounded by Mountains on three sides.Its name in the ancient days was "UDUMALAI"...

. It joins with the Kaveri at Thirumukkudal, about 10km from Karur

Karur

Karur is a large town and a municipality in Karur district in the Indian state of Tamil Nadu situated on the banks of Amaravati. Karur district was formed on 30 September 1995 by trifurcating Tiruchirappalli district. It is the administrative headquarters of Karur District. Karur has a very long...

. The ancient name of the river is Anporunai and locals still use the name amrandhu, a derivative.

Use

This river irrigates over 60000 acres (242.8 km²) of agricultural lands in Coimbatore

Coimbatore District

Coimbatore District is one of the more affluent and industrially advanced districts of the state of Tamil Nadu in India. Coimbatore is known as the Manchester of South India. It one of the most industrialized towns of Tamil Nadu. It has the highest GDP among the districts of Tamil Nadu, even ahead...

, Erode

Erode District

Erode District is a western district of the state of Tamil Nadu, India, with Erode as its headquarters. Until the year 1996, Erode district was called as Periyar District....

 and Karur

Karur District

Karur District is located center along the Kaveri & Amaravati rivers in the Indian State of Tamil Nadu. The main town in Karur District is the city of Karur, which is also the district headquarter. It had a population of 935,686 as of 2001. It is 33.27% urbanized as per Census 2001...

 districts. The Amaravathi Dam has 4 Megawatts electric generating capacity installed. The Amaravathi River and its basin, especially in the vicinity of Karur

Karur

Karur is a large town and a municipality in Karur district in the Indian state of Tamil Nadu situated on the banks of Amaravati. Karur district was formed on 30 September 1995 by trifurcating Tiruchirappalli district. It is the administrative headquarters of Karur District. Karur has a very long...

, are heavily used for industrial processing water and waste disposal and as a result are severely polluted due to large amount of textile dyeing and bleaching units.