Grading and Drainage Flashcards
6 cards from real BLArch Bachelor of Landscape Architecture practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Grading and Drainage flashcards as text
What is a 'retention pond' primarily designed to do differently from a detention basin?
Answer: Permanently hold a pool of water with controlled overflow
A retention pond permanently holds a standing pool of water with a controlled outlet, providing water quality treatment and often aesthetic amenity.
What is the maximum recommended running slope for an accessible ramp per ADA guidelines?
Answer: 8.33%
ADA guidelines specify a maximum running slope of 1:12 (8.33%) for accessible ramps, with handrails required above 6 inches of rise.
In landscape grading, a 'berm' is defined as:
Answer: A raised mound of earth used as a design or screening element
A berm is a raised mound of earth constructed in the landscape for screening, noise reduction, visual interest, or directing drainage.
What does 'finish grade' refer to in a construction context?
Answer: The final elevation of the ground surface after all grading work is complete
Finish grade is the final elevation of the ground surface after all grading, topsoil placement, and surface preparation work is complete.
Which type of retaining wall relies on the weight of the wall itself (gravity) to resist soil pressure?
Answer: Gravity wall
A gravity retaining wall uses its own mass to resist the lateral pressure of retained soil, typically constructed of concrete, stone, or masonry.
What is the primary reason topsoil is typically stripped and stockpiled before grading begins?
Answer: To preserve the fertile layer for reuse after final grading
Topsoil contains organic matter and nutrients essential for plant growth; stripping and stockpiling preserves it for redistribution at finish grade.