Idukki district · Irrigation · Thodupuzha basin · report 01 Nov 2026, 11:00 IST

Storage
65.0%
Previous 67.0%
Water level
38.58 m (126.6 ft)
FRL 42.00 m (137.8 ft)
Spillway release
15.6 cumecs
Latest report
Rain forecast
13 mm
Next 72h 31 mm
Rate of rise(derived)
-0.18 m / 24 h
Downstream exposure
Thodupuzha river below Malankara towards Muvattupuzha
Local bodies on this reach: Thodupuzha, Karimannoor, Muvattupuzha, Arakuzha
District control room: 1077 / 04862-233111
No rule curve (seasonal guide curve) is published for Malankara 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.
Malankara is at blue alert with storage at 88%, up from 81%, and the water level at 40.92 m against the 42 m FRL. The rise is being driven by 25 mm of rain in the past 24 hours despite a 56.15 cumec spill through two shutters opened 10 cm each, along with drinking-water and power-generation outflows; the next alert level would be triggered if the level rises further toward 42 m under the forecast 13 mm in 24 hours and 31.2 mm in 72 hours.
CH₄ from flooded land × GWP-100 (27), age-adjusted
Western Ghats forest sink, 60% forest cover assumed
—
vs CEA grid 0.716 kg CO₂/kWh, 35% capacity factor
Net catchment balance: Not enough data/yr (forest + sediment sinks minus reservoir methane)
Estimate, not a measurement — built from IPCC 2019 Flooded Lands factors and public dam data. Kerala does not publish measured reservoir emissions. Credits shown are indicative, not registered. How this is calculated