Working with Villanova University, we have been monitoring a blue roof (rainwater storage system) on an apartment just off Temple’s campus. The roof was draining too fast to we modified the drainage pipes to try to increase storage time. The first storm showed the modification (which cost about $5 per pipe) worked! This is a nice green infrastructure improvement story.
Russell Ewing, Grad student at Villanova University installing a restricting band on the drain pipe opening
Water level plot showing slower drainage on the roof where the bands were placed.