CFB Drainage & Irrigation Systems Flashcards
6 cards from real CFB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CFB Drainage & Irrigation Systems flashcards as text
What is the recommended minimum slope for surface drainage on a natural grass athletic field?
Answer: 1.0%
A minimum 1.0% slope is recommended for natural grass athletic fields to ensure effective surface water runoff.
Which type of subsurface drainage system uses perforated pipes installed in gravel-filled trenches beneath a field?
Answer: French drain system
A French drain system uses perforated pipes surrounded by gravel-filled trenches to collect and redirect subsurface water.
What is the primary purpose of a rootzone drainage layer in a sand-based athletic field?
Answer: To allow rapid percolation of water away from the playing surface
The rootzone drainage layer in sand-based fields is designed to allow water to percolate quickly downward, keeping the surface playable.
In athletic field irrigation design, what does 'distribution uniformity' (DU) measure?
Answer: The consistency of water application across the irrigated area
Distribution uniformity measures how evenly water is applied across an irrigation zone, with higher DU values indicating more consistent coverage.
Which factor most directly determines the spacing between lateral drainage pipes in an athletic field?
Answer: The hydraulic conductivity of the soil
Soil hydraulic conductivity determines how quickly water moves laterally through the soil, which directly governs the required spacing between drainage pipes.
What is the standard installation depth for main collector drain lines beneath athletic fields in the US?
Answer: 36–48 inches
Main collector drain lines are typically installed at 36–48 inches depth to stay below the rootzone and avoid interference with field maintenance equipment.