Flood hazard mapping and early warning for disaster management authorities
Flood inundation mapping, dam-break emergency action plan support, and early-warning drought indices that feed directly into disaster preparedness and response planning.
Disaster management runs on decisions taken before the event, and those decisions need spatial specificity: not that a district is flood-prone, but which settlements flood at which river stage, how long the warning window is, and which access routes are lost first. That level of detail comes from hydraulic modeling, not from historical incident records.
We produce flood inundation maps tied to river stage and return period, dam-break scenario modeling for emergency action planning, and satellite-derived drought indices with enough lead time to act on. Outputs are built for operational use — legible under pressure, not just technically complete.
What makes this sector different
- Preparedness planning needs settlement-level detail, not district-level hazard classes.
- The warning window depends on flood wave travel time, which historical records rarely capture.
- Dam-break planning requires scenarios that have, by definition, never been observed.
- Slow-onset hazards such as drought need indices that trigger early enough for a response to matter.
What we deliver
- Flood inundation maps by return period, classified by depth and velocity hazard to people
- Flood wave travel-time estimates to define the available warning window
- Dam-break inundation scenarios supporting emergency action plans
- SPI, SPEI and vegetation-condition drought indices with defined trigger thresholds
Common questions from disaster management authorities
What does depth and velocity hazard classification mean?
Flood danger to people is a function of depth and velocity together, not depth alone — shallow fast-moving water can sweep an adult off their feet where deeper still water would not. Classifying the combined product identifies where evacuation is genuinely urgent, rather than treating all inundated area as equally dangerous.
Can you model a dam-break scenario that has never occurred?
Yes, and that is the point of it. A dam-break model routes a hypothetical breach outflow through the downstream valley to produce inundation extent and arrival times. It is scenario analysis rather than prediction, and the assumptions — breach width, formation time, reservoir level — are stated so the plan can be tested against alternatives.
How much lead time can a drought index give?
Meteorological drought indices such as SPI respond within weeks of a rainfall deficit; agricultural impact follows months later. That lag is the opportunity — a monitored SPI can trigger a response well before crop stress is visible in the field, provided the trigger thresholds are agreed in advance rather than debated during the event.