220 likes | 319 Vues
Learn how the permeability of surfaces like gravel, sand, silt, clay, and cement affects water runoff in urban versus suburban areas. Discover the significance of land cover on water management.
E N D
If water can pass through a surface, the surface is permeable.
Gravel • Very high permeability
Sand • High permeability
If water cannot pass through a surface, the surface is impermeable.
Silt • Low permeability
Clay • Very low permeability
Cement • Impermeable
Run-off: Water that does not soak into the ground or evaporate, but instead flows across the land
Do you think the surfaces in urban areas permeable or impermeable?
Conclusions • 1. Different land cover affects water runoff during/after storms in different ways. • 2. Human habitation changes land cover • 3. Communities need to be careful about how land is used.