Hardscape & Grading第 64 / 100 题
Directing a downspout's discharge onto a splash block or into a pipe that carries it away from the house prevents what?
a.Higher soil pH
b.Foundation soil erosion and water ponding against the structure
c.Faster plant growth
d.Better paver interlock
解析
Concentrated roof runoff from a downspout can erode soil and saturate the ground against a foundation, leading to settlement and moisture intrusion. A splash block or piped extension moves that water away from the structure. This is a basic but important part of site drainage design.
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