Storage
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Water level
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FRL 46.33 m (152.0 ft)
Spillway release
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Latest report
Rain forecast
10 mm
Next 72h 43 mm
Rate of rise(derived)
Trend needs two bulletins
Projection needs 3 days of bulletins (0 held).
Downstream exposure
The downstream reach and local body list for Mullaperiyar have not been transcribed from a District Disaster Management Plan yet, so none are shown.
District control room: 1077 / 04862-233111
No rule curve (seasonal guide curve) is published for Mullaperiyar 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.
An AI analysis for this reservoir will appear after the next scheduled briefing.
Built 1887-1895 by Col. John Pennycuick across the Periyar at its confluence with the Mullayar, the dam diverts water through a tunnel to the Vaigai basin in Tamil Nadu. Its 152 ft (46.33 m) design FRL was cut to 136 ft in 1979 on safety grounds, restored to 142 ft (43.28 m) by the Supreme Court in 2006 and reaffirmed in 2014, with a Supervisory Committee monitoring the rule level. Because the dam is operated by Tamil Nadu, its readings are published through the Supervisory Committee and Idukki district administration rather than the KSEB or Kerala Irrigation bulletins, so no automated KSDMA measurement feed exists for it.
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 |
|---|---|---|---|---|---|
| Bhoothathankettu (Barrage)Ernakulam | 31.00 / 34.95101.7 ft / 114.7 ft | — | — | 800 m³/s | Controlled release — water is being released in regulated quantities, not a danger warning |
| MullaperiyarIdukki | — / 46.33— / 152.0 ft | — | — | — | No warning — below every published alert level |
| Lower Periyar (Pambla)Idukki | 249.90 / 253.00819.9 ft / 830.1 ft | 71.5% | — | — | No warning — below every published alert level |
| NeriamangalamIdukki | — / —— / — | — | — | — | No warning — below every published alert level |
| IdukkiIdukki | 721.42 / 732.432366.9 ft / 2403.0 ft | 61.0% | — | — | No warning — below every published alert level |