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.

Dayaraba Reservoir

Mahaweli Authority reservoir

Dayaraba reservoir is 67% full. Live gate releases are not published for it. Mahaweli Authority, 26 Oct.

Live release not published

As of 26 Oct · Checked 3 min ago

Steady. CEB doesn't publish live gate releases. We show storage and the Mahaweli weekly plan. Storage: Mahaweli Authority, 26 Oct. Level -0.20 m since 23 Oct.

67%full

Level 971.35 m above sea level

Steady

Level -0.20 m since 23 Oct.

Mahaweli Authority · 26 Oct

Release now

Live release not published

CEB doesn't publish live gate releases. We show storage and the Mahaweli weekly plan.

Planned release

0.7 million m³ a day

≈ 290 cusecs on average

Planned average for 26 Oct – 1 Nov

6.86 million m³ released in the week before the meeting

A plan for the week, not a measured flow and not a spill.

Mahaweli Authority weekly meeting, 23 Oct

Rain, day before: No data
Holds when full: No data
Source: Mahaweli Authority · 26 Oct

Recent days

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

Fri 23
69%
No data
Mon 26
67%
No data

Storage, % full · 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 Dayaraba releasing water?: Dayaraba reservoir is 67% full. Live gate releases are not published for it. Mahaweli Authority, 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.