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.

Uyanwewa Reservoir

Kirama OyaGalle

Uyanwewa reservoir is spilling about 18.02 cusecs and is 100% full. Irrigation Department, 26 Oct.

SpillingSmall release

As of 26 Oct · Checked 2 min ago

100%full

16.6 of 15.3 ft

1.3 ft above full

Irrigation Department · 26 Oct

Release now

18.02 cusecs

Spill

≈ 510 L/s · An Olympic pool every ~82 min

1 cusec ≈ 28 L/s

Irrigation Department · 26 Oct

Rain, day before: 48 mm; Irrigation Department · 26 Oct
Holds when full: ~0.2 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
109%
0.28 cusecs

Water depth, % of full supply · Spill

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 Uyanwewa releasing water?: Uyanwewa reservoir is spilling about 18.02 cusecs and is 100% 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.