The Marcus Garvey Park rainwater swale is a good example of a landscape-sensitive, runoff water management strategy.
A “swale” is a pitched and gently sunken area designed to divert and absorb water, Merriam Webster says “3. A shallow troughlike depression that carries water mainly during rainstorms or snow melts.”
Yes, this would be it.
The idea is the diverted runoff water seeps into the earth between the cobblestones on the way down, using the earth as a natural water filter.
Any water that reaches bottom is captured by a manhole-style culvert.
And then probably heads for the Harlem River.
About where we live.