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.

Maha Aluthgamara Reservoir

Hambantota

Maha Aluthgamara reservoir is not releasing water and is 69% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 4 min ago

69%full

11.5 of 16.0 ft

4.5 ft below full

Irrigation Department · 26 Oct

Release now

Only canal outlets are open

Outlet gates 36 cusecs

Irrigation Department · 26 Oct

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~1.9 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.

Fri 23
73%
No data
Mon 26
72%
No data

Water depth, % of full supply · Released downstream

Where the water goes

No river gauge of ours is directly below this reservoir.

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

Common questions

Is Maha Aluthgamara releasing water?: Maha Aluthgamara reservoir is not releasing water and is 69% 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.