Where does the reservoir information come from?

From the Irrigation Department's daily reservoir sheet and the Mahaweli Authority's daily report. Both update about once a day, so check the date shown. This site is independent: for spill-gate warnings follow the Disaster Management Centre and call 117.

Sri Lanka Water LevelsLive river-gauge readings

Giants Tank

Malwathu OyaMannar

Giants Tank reservoir is not releasing water and is 73% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 9 min ago

73%full

9.8 of 11.6 ft

1.8 ft below full

Irrigation Department · 26 Oct

Release now

Only canal outlets are open

Outlet gates 56 cusecs

Irrigation Department · 26 Oct

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~38 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct

Recent days

History starts 23 Oct. The trend chart appears after 3 days, check back.

Sun 25
80%
No data
Mon 26
85%
No data

Water depth, % of full supply · Released downstream

Where the water goes

No river gauge of ours is directly below this reservoir.

Map of this river

On the same river

Gauges

Thanthirimale

Other reservoirs

Figures from the daily Irrigation Department and Mahaweli Authority reports. A blank there shows here as “no data”, never zero.

Common questions

Is Giants Tank releasing water?: Giants Tank reservoir is not releasing water and is 73% full. Irrigation Department, 26 Oct.
Where does the reservoir information come from?: From the Irrigation Department's daily reservoir sheet and the Mahaweli Authority's daily report. Both update about once a day, so check the date shown. This site is independent: for spill-gate warnings follow the Disaster Management Centre and call 117.