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.
Walawe Ganga
Last 4 days · 94 readings · Asia/Colombo. Unit (ft or m) inferred from the gauge’s flood thresholds; shown only when confident.
Major irrigation reservoir
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.