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.

Saddhathissa Reservoir

Moneragala

Saddhathissa reservoir is spilling about 5 cusecs and is 100% full. Irrigation Department, 26 Oct.

SpillingSmall release

As of 26 Oct · Checked 1 min ago

100%full

14.0 of 14.0 ft

At full supply

Irrigation Department · 26 Oct

Release now

5 cusecs

Spill

≈ 140 L/s · An Olympic pool every ~5 h

1 cusec ≈ 28 L/s

Irrigation Department · 26 Oct

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~1.4 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
100%
5 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 Saddhathissa releasing water?: Saddhathissa reservoir is spilling about 5 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.