Friday, December 14, 2007

Storm Drain filters

As crews went to work to repair the stormdrain before paving my street, it seemed like another missed opportunity... especially as we have been working to promote our "Ocean Friendly Gardens" and green infrastructure solutions to urban runoff.

This is the top of the 10 foot square concrete box culvert once known as "Prince Barranca." The situation gained more meaning as the rain began to fall...

There are alternatives... Here's one manufactured solution for retrofit of urban stormdrains:

Stormwater Bioretention Filtration System

These are an effective (but fairly expensive) solution for retrofit of existing storm drains. This company's website has a nice animated graphic showing how this works - capture and infiltrate "first flush" stormwater runoff (or your day-to-day flows like car washing or sprinkler over-spray) as well as trash and debris, while providing a bypass for higher storm flows.