The latest storm was the third “thousand-year” event — one with a 0.1% likelihood of occurring in any given year — to hit Southern California this winter.
— LA Times in an article on trying to balance flood control and stormwater capture.
The current flood control system managed to handle 60% of average LA’s annual rainfall hitting in the space of three days. The current stormwater capture system can’t: 80% of that water is heading straight to the ocean. Projects to improving it are in the works, but increasing that capture is only going to get more important.
Note: combine with locally-sourced water and link to water-management