Periyar
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Basin area, km2
|
:
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5398
|
|
Basin area in Kerala State, km2
|
:
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5284
|
|
Basin area in neighbouring State, km2
|
:
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114 (Tamil Nadu )
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District of Kerala in which basin are located
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:
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Idukki, Eranakulam
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Origin of River
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:
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Sivagiri Elevation. m : 1830
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Length of main stream, km
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:
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244
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Main tributaries
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:
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Muthirapuzha Ar, Perinjankutty, Idamalayar, Mangalapuzha
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Average annual rainfall, mm
|
:
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3200
|
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Average annual streamflow, Mm3
|
:
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4867.9
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Important rainguage stations marked on the map (with code numbers)
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:
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1. Kodungallur (1)
2. Perumbavur(2)
3. Irumpupalam (3)
4. Odakkali (4)
5. Adimali (5)
6. Perinjankutty (6)
7. Devikulam (8)
8. Kokkayar (7)
9. Malayattur(9)
10. Kumily (10)
11. Chinnar(11)
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Important discharge stations marked on the map (with code numbers)
|
:
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1. Marthandavarma (1)
2. Panniar (2)
3. Kalady (3)
4. Bhuthathankettu (4)
5. Idamalayar (5)
6. Rajakad (6)
7. Kallar (7)
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Water requirement for wetland for three crops, Mm3
|
:
|
1338
|
|
Water requirement for gardenland , Mm3
|
:
|
506
|
|
Water requirement for domestic use (2021 AD), Mm3
|
:
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260
|
|
Water requirement for industrial use (2021 AD), Mm3
|
:
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450
|
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Existing major/medium irrigationproject (commissioned)
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:
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Periyar Valley
|
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Major/medium irrigation projects under construction
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:
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Idamalayar
|
|
Existing Hydroelectric project
|
:
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Sengulam, Neriamangalam, Panniar, Idukki
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Hydroelectric project Under Construction
|
:
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Perinjankuztty, Neo Pallivasal, Lower Periyar, Idamalayar, Puyamkutty, Erattayar, Kallar
|
|
Navigable length of river, km
|
:
|
72
|
(Note: The Periyar River is the longest river in the state of Kerala, India, with a length of 244 km. The Periyar is known as The lifeline of Kerala; it is one of the few perennial rivers in the region and provides drinking water for several major towns. The Idukki Dam on the Periyar generates a significant proportion of Kerala's electrical power. It flows north through Periyar National Park into Periyar Lake, a 55 km² artificial reservoir created in 1895 by the construction of a dam across the river. Water is diverted from the lake into the Vaigai River in Tamil Nadu via a tunnel through the Western Ghats. From the lake, the river flows northwest through the village of Neeleswaram into Vembanad Lake and out to the Arabian Sea coast. Its largest tributaries are the Muthirapuzha River, the Mullayar River, the Cheruthoni River, the Perinjankutti River and the Edamala River. Through the Periyar Lake dam and tunnel, the river serves as the major water source for five drought-prone districts in the state of Tamil Nadu, including Theni, Madurai and Ramanathapuram.)