Idamalayar

Ernakulam district · KSEB · Idamalayar basin · report 04 Aug 2026, 14:00 IST

Normal

Storage

49.2%

Previous 48.9%

Water level

149.35 m (490.0 ft)

FRL 169.00 m (554.5 ft)

Spillway release

—

Latest report

Rain forecast

20 mm

Next 72h 48 mm

Storage & water level — last 30 days

Risk breakdown

Flood risk25

Landslide risk18

Reservoir stress43

Watershed saturation16

River overflow11

• All monitored indicators within normal operating range

Rule curve — seasonal operating target

No rule curve (seasonal guide curve) is published for Idamalayar in a form this platform can verify, so none is shown. Where an operating curve is published — as for Idukki after the 2018 floods — it is plotted against actual storage instead of being estimated.

Rainfall forecast — next 48 hours

Spillway releases

Current weather at the dam

Temperature: 22.4°C
Humidity: 99%
Rain 24h: 23.2 mm
Wind: 3 km/h
Gusts: 10 km/h
Pressure: 973 hPa

AI analysis

An AI analysis for this reservoir will appear after the next scheduled briefing.

Watch alert — Idamalayar · 03 Aug 2026, 10:14 IST

Reservoir information bulletin

Commissioned: 1985
Dam type: Concrete gravity
Height: 102.0 m (334.6 ft)
Length: —
Gross capacity: 1089.0 MCM
Live capacity: 1089.0 MCM
Catchment area: 382 km²
Full reservoir level: 169.00 m (554.5 ft)
Power station: Idamalayar HEP
Installed capacity: 75.0 MW
Purpose: Hydroelectric
Operator: KSEB
River: Idamalayar
Basin: Periyar
Nearby towns: Bhoothathankettu, Kothamangalam
Emergency contact: 1077 / 0484-2422221

Built across the Idamalayar, a tributary of the Periyar in Ernakulam district, and commissioned in 1985 with a 75 MW powerhouse. Releases from Idamalayar join the Periyar upstream of the Bhoothathankettu barrage.