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.

Sri Lanka Water LevelsLive river-gauge readings

Usgala Siyabalan Reservoir

Kurunegala

Usgala Siyabalan reservoir is spilling about 1,518 cusecs and is 100% full. Irrigation Department, 26 Oct.

SpillingLarge release

As of 26 Oct · Checked 3 min ago

100%full

22.0 of 21.0 ft

1.0 ft above full

Irrigation Department · 26 Oct

Release now

1,518 cusecs

Spill

≈ 43,000 L/s · An Olympic pool every ~58 s

1 cusec ≈ 28 L/s

Irrigation Department · 26 Oct

Rain, day before: 37 mm; Irrigation Department · 26 Oct
Holds when full: ~27 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
103%
826 cusecs
Mon 26
105%
1,518 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 Usgala Siyabalan releasing water?: Usgala Siyabalan reservoir is spilling about 1,518 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.