Live reading from the Department of Irrigation, refreshed every minute. Below: alert / minor-flood / major-flood thresholds, recent history, next-hour forecast and the upstream → downstream basin view.
Stations ordered by river flow. Trend = change over last ~3 hours; arrow direction reflects rate. Ordering for this basin is by longitude — may not perfectly match river hydrology.
Mahaweli Ganga
Last 4 days · 95 readings · Asia/Colombo. Unit (ft or m) inferred from the gauge’s flood thresholds; shown only when confident.
Top of Mahaweli cascade
Diverts Mahaweli flow north via tunnel to Bowatenna
Receives Polgolla diversion → Amban Ganga
Largest reservoir in the cascade
Largest by capacity
Final dam in the upper cascade
Newer, on Amban Ganga branch
Static catalogue hand-curated from Mahaweli Authority and CEB sources. Live MW values are sourced from the PUCSL GenData API but the endpoint currently returns empty values across all plants — the table is a published stub. Real release data should appear here automatically when CEB starts populating it.