🌊 Flood Risk Simulator (2D)
Top-down city map · adjust the sliders to explore flood scenarios
Flood Drivers
Rainfall Intensity
20 mm/hr
River Level
0.0 m
Sea Level Rise
0.0 m
Drainage Efficiency
50 %
Simulation Speed
1.0×
⏸ Pause
↺ Reset
Live Readout
0.00 m
current water level ·
+0.00 m/hr
Houses flooded
0 / 0
Roads flooded
0 / 0
Vehicles submerged
0 / 0
Safe terrain
100%
Danger terrain
0%
Elapsed (sim)
0.0 hr
Zone Legend
Safe — 3 m+ above water
Caution — within 1–3 m
Danger — within 1 m
Submerged — underwater
Why this happens
Rainfall
adds runoff faster than low-lying ground can absorb it, especially on paved city surfaces.
River level
reflects upstream conditions — heavy rain far away can flood a city with clear local skies.
Sea level rise
raises the baseline that river and storm water drain into, backing up drainage systems.
Drainage efficiency
models pumps, storm drains and permeable ground — higher values remove water faster.
This is a simplified
reservoir (bucket) model
, not a full fluid-dynamics solver — it approximates realistic trends, not exact hydraulics.