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.

Ridiyagama Reservoir

Hambantota

Ridiyagama reservoir is not releasing water and is 95% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 2 min ago

95%full

18.7 of 19.5 ft

0.8 ft below full

Level -0.10 m since 23 Oct.

Mahaweli Authority: 99% (26 Oct)

Irrigation Department · 26 Oct

Release now

Only canal outlets are open

Outlet gates 224 cusecs

Irrigation Department · 26 Oct

Rain, day before: 9.3 mm; Irrigation Department · 26 Oct
Holds when full: ~32 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct Mahaweli Authority · 26 Oct

Recent days

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

Fri 23
97%
No data
Mon 26
96%
No data

Water depth, % of full supply · 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 Ridiyagama releasing water?: Ridiyagama reservoir is not releasing water and is 95% 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.