In springtime, the maple blossoms cover the streets and sidewalks for just a day or two.
When it rained, the blossoms showed where the runoff had flowed on the sidewalks and driveways.
As trees on the terraces mature, their roots expand, pushing up the soil around sidewalks. The raised soil channels the runoff within the sidewalk, turning sidewalks into streams. Periodically, the sidewalk streams empty into the streets via driveways. From there, the stormwater flows directly to the lakes.
If sidewalk runoff can be captured in rain gardens, it helps to restore the natural hydrology. Drinking water is restored, springflow is improved, while nearby lakes are cleaner.
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