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.

Mahagal Wewa

Hambantota

Mahagal Wewa reservoir is not releasing water and is 18% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 3 min ago

18%full

1.8 of 12.0 ft

10.2 ft below full

Irrigation Department · 26 Oct

Release now

Only canal outlets are open

Outlet gates 5 cusecs

Irrigation Department · 26 Oct

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~3.4 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
17%
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 Mahagal Wewa releasing water?: Mahagal Wewa reservoir is not releasing water and is 18% 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.