Wayanad district · KSEB · Karamanathodu basin · report 18 Sep 2026, 11:00 IST
Storage
78.1%
Previous 78.3%
Water level
771.95 m (2532.6 ft)
FRL 770.00 m (2526.2 ft)
Spillway release
—
Latest report
Rain forecast
10 mm
Next 72h 24 mm
Rate of rise(derived)
-0.05 m / 24 h
Downstream exposure
The downstream reach and local body list for Banasura Sagar have not been transcribed from a District Disaster Management Plan yet, so none are shown.
District control room: 1077 / 04936-204151
No rule curve (seasonal guide curve) is published for Banasura Sagar 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.
Banasura Sagar is at yellow alert with storage at 79.08%, down from 79.28%; the reported water level is 772.1 m against an FRL of 770 m, with no spill, while the tunnel gate is 50% open and discharging 0.58 MCM. Recent rain was 10.2 mm, but only 1.4 mm is forecast in the next 24 hours and 11.3 mm over 72 hours, so inflows should ease; the next alert level would be triggered if further rainfall and inflows raise storage or water level to the reservoir’s orange-alert threshold, which is not provided.
Banasura Sagar in Wayanad is the largest earth dam in India and the second largest in Asia. It was built across the Karamanathodu, a tributary of the Kabini, to augment the Kuttiady hydroelectric scheme and support irrigation.