Observed arrival · 2026-10-09
Batticaloa’s Flood Early Warning System
An operational flood-forecasting system for the river basins that drain into Sri Lanka’s Batticaloa lagoon, with forecasts, inundation maps, and threshold-based alerts.
- For
- Flood-response operators and district decision-makers
- Worth noticing
- The displayed Run #922 reports all monitored junctions below threshold and a maximum inundation extent of 114 km² at depths of at least 0.5 m.
Field notes
The system chains HEC-HMS rainfall-runoff modelling, HEC-ResSim reservoir operations, and HEC-RAS 2-D floodplain hydraulics, using observed river and rain data alongside ECMWF forecasts. The page names four basins—Maduru Oya, Mundeni Aru, Magilawattuwan, and Andella Oya—and says Maduru Oya reservoir operations are routed through HEC-ResSim. Four tools are listed: observation and forecast maps, an observation dashboard, and a model dashboard.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue