What’s on the Darcy's Law poster
The rule, 3 worked examples, and the mistake everyone makes.
- Flow through soil is proportional to the hydraulic gradient, with permeability as the…
- v = ki · Q = kiA · i = Δh/L
- k 0.00001, i 0.02 = v = 0.2 μm/s
- Clean gravel = k above 10 mm/s
- Intact clay = k below 1 nm/s
- Common mistake: Reading v as the speed of the water → Divide by porosity for that
Educational reference. Darcy assumes laminar flow in a saturated, uniform soil. Field permeability can vary by orders.
Questions about the Darcy's Law poster
- What’s on the Darcy's Law poster?
- The rule, 3 worked examples, and the mistake everyone makes. Flow through soil is proportional to the hydraulic gradient, with permeability as the…; v = ki · Q = kiA · i = Δh/L; k 0.00001, i 0.02 = v = 0.2 μm/s; Clean gravel = k above 10 mm/s; Intact clay = k below 1 nm/s; Common mistake: Reading v as the speed of the water → Divide by porosity for that. Educational reference. Darcy assumes laminar flow in a saturated, uniform soil. Field permeability can vary by orders.
- Who is the Darcy's Law poster for?
- Darcy's Law belongs to the Civil Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning geotechnical can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Darcy's Law poster?
- Dewatering, seepage under a dam, drainage behind a wall, landfill liners. A wall chart earns its place by being glanceable from where the work is happening, so Darcy's Law belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
- What other posters go with Darcy's Law?
- Atterberg Limits, Bearing Capacity and Compaction Control sit alongside Darcy's Law in the Civil Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Atterberg LimitsBearing CapacityCompaction Control
- Is the Darcy's Law poster free to download and print?
- Yes. Darcy's Law downloads as a free PDF with no account, no email and no watermark, like everything else in the Civil Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Darcy's Law poster print at?
- Darcy's Law is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Darcy's Law loses nothing.Printing guide
Related posters
Charts that sit alongside Darcy's Law on the same wall.
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