Four colours, one meaning
Blue is normal operation, Yellow is watch, Orange is warning and Red is danger. The colour is derived, never scraped: JalaNet computes it from published measurements so that the same rule applies to all reservoirs, whichever agency filed the report.
What goes into the score
The engine combines, per reservoir:
- Freeboard in metres below FRL, and the reservoir's own published blue/orange/red rule levels where available.
- Storage percentage and the change since the previous report (rate of rise).
- Measured outflow, and whether the dam is currently spilling.
- Forecast rainfall over 24 h and 72 h, plus rainfall intensity.
- Terrain and antecedent saturation for the landslide component.
Deliberate conservatism
High outflow alone no longer escalates a dam to Red. Shutter-controlled barrages routinely discharge huge volumes at low storage, and treating that as danger produced false alarms. Red now requires the structure to be under pressure as well — near or above its orange threshold, or with under a metre of freeboard.
Unit mismatches are corrected before scoring. Some KSEB rows publish level in feet against a metre FRL; a ratio test detects this and converts, and the correction is disclosed in each card's provenance panel.
This is not an official warning
JalaNet's colours are an independent reading of official data, refreshed hourly. They do not replace KSDMA orange/red alerts, IMD warnings, or district evacuation orders. When they disagree, follow the government.