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.

Ambalan Oya Reservoir

Ambalan OyaAmpara

Ambalan Oya reservoir is not releasing water and is 23% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 3 min ago

23%full

10.1 of 25.5 ft

15.4 ft below full

Irrigation Department · 26 Oct

Release now

Not releasing water

Irrigation Department · 26 Oct

Rain, day before: 30.4 mm; Irrigation Department · 26 Oct
Holds when full: ~44 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct

Recent days

Water depth, % of full supply
Released downstream · Release (cusecs)

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 Ambalan Oya releasing water?: Ambalan Oya reservoir is not releasing water and is 23% 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.