PPD - Drainage Patterns
Hi, I am taking the PPD practice exam on the NCARB website. The question states that an architect is developing a site for a car dealership and wants to select a building site that maintains existing site drainage and landscaping and that the owner wants parking visible from traffic. I understand why B is the answer but where I am confused is that my studies show that building parallel to contours is most efficient to mitigate regrading/removing earth. Is building parallel to the contours not most efficient for drainage? Or is that a separate topic? It appears what's most efficient for drainage based off of this question is building perpendicular to the contours.
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Hi Brian,
You are correct that building parallel to the contours is the most efficient method of managing cut and fill.
If we think about efficient drainage - that would be a straight line from point A to point B in a direct line at a steep slope. Placing a building in the path of that direct line - interrupts the flow of the water, meaning that you need to divert the flow of the water along a different path. The longer the building the further you would need to divert the water.I interpreted this question as asking, not about the efficiency of drainage, but about interrupting the flow of water on the site the least.
Hope that helps?
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