Reservoir · Kerala · India · Tamil Nadu WRD
Thunacadavu
93.6% of gross capacity
Gross capacity
0.57 TMC (16 MCM)
Live capacity
0.32 TMC (9 MCM)
River
Thunacadavu River
Basin
Chalakkudy
Primary use
irrigation
Operator
Tamil Nadu Water Resources Dept
Coordinates
10.434°N, 76.781°E
Last updated
2026-10-28
Capacity in TMC
Thunacadavu Dam has a gross capacity of 0.57 TMC (16 MCM), of which 0.32 TMC (9 MCM) is live storage; it is currently at 93.6% of gross capacity, holding 0.53 TMC (15 MCM) (166.7% of live capacity).
- Gross capacity
- 0.57 TMC (16 MCM)
- Live capacity
- 0.32 TMC (9 MCM)
- Current storage
- 0.53 TMC (15 MCM)
TMC is thousand million cubic feet, the unit used in Indian water reporting. 1 TMC = 28.3168 million cubic metres (MCM). Figures are converted from Tamil Nadu WRD, which publishes million cubic metres. The percentage is labelled live or gross only when the stored volume matches that capacity.
Current fill
93.6%vs 7 days ago
N/Avs 1 year ago
N/A7-day trend
N/ADrought context
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Thunacadavu had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.92). Rain, not storage. India drought figures →
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: Tamil Nadu WRD.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 10.434°N, 76.781°E · Open in Google Maps
About Thunacadavu
As of October 28, 2026, Thunacadavu is filled to 93.6% of its gross capacity, holding 0.53 TMC (15 MCM) of a gross 0.57 TMC (16 MCM). At this level the reservoir is high. Of that total, 0.32 TMC (9 MCM) is live storage.
No reading from about a week earlier is on file, so the 7-day change is not available.
Across the readings we hold for Thunacadavu — 9 data points between July 2, 2026 and October 28, 2026 — the level has ranged from a low of 73.7% (August 22, 2026) to a high of 93.6% (October 28, 2026).
It is operated by Tamil Nadu Water Resources Dept primarily for irrigation. It lies within the Chalakkudy basin at 10.434°N, 76.781°E.
Key facts
- Current fill level
- 93.6% of total capacity
- Water stored
- 0.53 TMC (15 MCM)
- Total capacity
- 0.57 TMC (16 MCM)
- Usable capacity
- 0.32 TMC (9 MCM)
- 7-day change
- N/A
- Primary use
- Irrigation
- River
- Thunacadavu River
- River basin
- Chalakkudy
- Operator
- Tamil Nadu Water Resources Dept
- Coordinates
- 10.434°N, 76.781°E
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 93.6% | 15 |
| 24 Sep 2026 | 90.7% | 14 |
| 18 Sep 2026 | 80.2% | 13 |
| 11 Sep 2026 | 73.7% | 12 |
| 4 Sep 2026 | 74.4% | 12 |
| 30 Aug 2026 | 74.7% | 12 |
| 22 Aug 2026 | 73.7% | 12 |
| 14 Aug 2026 | 74.1% | 12 |
| 2 Jul 2026 | 77.5% | 12 |