Undergrad research assistant Ashlynn Young has helped us develop a technique for measuring organic matter the stormwater sediment samples that grad student Liz Cushman collected. People keep asking us how much organic matter is in the sediment — now we can answer. Not much. Preliminary results, show there was around 10% OM in the sediment from urban stormwater runoff. However, the OM rose to 50% after the stormwater passed through the bioswale.
Now we just need to decide how many more to analyze. We have a few left… and this picture is just a fraction. Liz collected hundreds of stormwater last summer and fall!