Aliyar Reservoir
| Aliyar Reservoir/Aliyaru Reservoir | |
|---|---|
'Aerial view of Aliyar Reservoir, Dam at top
|
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| Location | Coimbatore District, Tamil Nadu |
| Coordinates | 10°28′26″N 76°58′22″E / 10.4739°N 76.9728°ECoordinates: 10°28′26″N 76°58′22″E / 10.4739°N 76.9728°E |
| Lake type | reservoir |
| Primary inflows | Aliyar river |
| Catchment area | 468.8 km2 (181.0 sq mi) |
| Basin countries |
 India
|
| Max. length | 2 km (1.2 mi) |
| Surface area | 6.48 km2 (2.50 sq mi) |
| Average depth | 18.2 m (60 ft) |
| Max. depth | 36.5 m (120 ft) |
| Water volume | 109,416,297 km3 (26,250,366 cu mi) |
| Shore length1 | 16.0 km (9.9 mi) |
| Surface elevation | 320 m (1,050 ft) |
| Islands | 1 |
| 1 Shore length is not a well-defined measure. | |
Aliyar (ஆழியாறு) (also spelt Azhiyar / Aaliyar) Reservoir is a 6.48 km2 (2.5 sq mi) reservoir located in Aliyar village near Pollachi town in Coimbatore District, Tamil Nadu, South India. The dam is located in the foothills of Valparai, in the Anaimalai Hills of the Western Ghats. It is about 65 kilometres (40 mi) from Coimbatore. The dam offers some ideal getaways including a park, garden, aquarium, play area and a mini Theme-Park maintained by Tamil Nadu Fisheries Corporation for visitors enjoyment. The scenery is beautiful, with mountains surrounding three quarters of the reservoir. Boating is also available.
The Aliyar Dam was constructed during 1959-1969 across the Aliyar river, mainly for irrigation purposes. The project was commissioned in September 2002 to generate Hydro Electric Power.
Aliyar lake receives water from Upper Aliyar Reservoir through the hydroelectric power station in Navamali and the Parambikulam reservoir through a contour canal. Aliyar dam, built as a part of Parambikulam aliyar project (PAP), retains a large reservoir. The dam is around 2 kilometres (1.2 mi) in length.
The lowest level outlet of the reservoir is 930 feet (280 m) above Mean Sea Level (MSL) and the canal intake is 980 feet (300 m) above MSL. The spillway is 1,040 feet (320 m) above MSL and the FRL (Full Reservoir Level) is 1,050 feet (320 m) above MSL. The maximum surface area is 48 hectares (120 acres) (1,600 acres). The volume of water at FRL is 3.864 Tmcft (88,705 acre feet (109,416,000 m3)). The maximum depth is 41 metres (135 ft) and the mean depth 16.8 metres (55 ft) . The volume development is 1.2 m. The highest inflow usually occurs during July and August. The shoreline is poorly indented, the shore development is poor and shallow and the Aquatic plants and limnology of the littoral zone is also very limited.
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