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.

Yan Oya Reservoir

Anuradhapura

Yan Oya reservoir is spilling about 2,292 cusecs and is 59% full. Irrigation Department, 26 Oct.

SpillingLarge release

As of 26 Oct · Checked 8 min ago

59%full

17.6 of 23.3 ft

5.6 ft below full

Irrigation Department · 26 Oct

Release now

2,292 cusecs

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~169 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct

Recent days

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 Yan Oya releasing water?: Yan Oya reservoir is spilling about 2,292 cusecs and is 59% 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.