Neriamangalam

Idukki district · KSEB · Periyar basin

Watch

Storage

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Water level

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Spillway release

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Latest report

Rain forecast

43 mm

Next 72h 93 mm

Storage & water level — last 30 days

Risk breakdown

Flood risk14

Landslide risk35

Reservoir stress0

Watershed saturation39

River overflow6

• Heavy rainfall recorded (68 mm/24h)

Rule curve — seasonal operating target

No rule curve (seasonal guide curve) is published for Neriamangalam 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: 22.7°C
Humidity: 98%
Rain 24h: 68.0 mm
Wind: 0 km/h
Gusts: 13 km/h
Pressure: 1005 hPa

AI analysis

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

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

Reservoir information bulletin

Commissioned: —
Dam type: —
Height: —
Length: —
Gross capacity: —
Live capacity: —
Catchment area: —
Full reservoir level: —
Power station: —
Installed capacity: —
Purpose: —
Operator: KSEB
River: Periyar
Basin: Periyar
Nearby towns: Neriamangalam
Emergency contact: 1077

Periyar river system — levels & flow

Every monitored structure on this river, ordered by how much water it is passing downstream right now.

Structure	Level / FRL (m)	Storage	Inflow	Outflow	Status
Lower Periyar (Pambla)Idukki	253.00 / 253.00830.1 ft / 830.1 ft	100.0%	—	80 m³/s	Danger
BhoothathankettuErnakulam	28.00 / 34.9591.9 ft / 114.7 ft	—	—	—	Normal
MullaperiyarIdukki	— / 46.33— / 152.0 ft	—	—	—	Watch
NeriamangalamIdukki	— / —— / —	—	—	—	Watch
IdukkiIdukki	715.49 / 732.432347.4 ft / 2403.0 ft	43.7%	—	—	Normal