Flash flood: new water-absorbing concrete Topmix Permeable can absorb 36 meters of rain in 1 hour

The video discusses the permeability of traditional concrete compared to top mix, a type of no-fines concrete made from crushed granite. Top mix allows better water passage and comes in three designs: full infiltration, partial infiltration, and full attenuation, each serving different water management purposes.

Explain the function of the semi-permeable barrier in partial infiltration systems.

How does full attenuation allow for water reuse?