Connecting individual rain gardens into a citywide corridor network multiplies their stormwater benefit far beyond what isolated installations achieve alone.
flood_risk ~ rainfall * (1 - corridor_density*absorption)
- City grid size — city blocks tracked in the blue-green network.
- Corridor density — how connected the rain-garden and green-corridor network is across the city.
- Rainfall intensity — storm event size driving stormwater load.
- Corridor maturity rate — how quickly newly installed blue-green corridors reach full absorptive capacity.
Blue-green infrastructure networks do double duty — the same corridor that soaks up a storm also becomes a wildlife movement corridor between habitat patches.