Water Flowing Downhill

Bernoulli equation

Fortunately velocity is very small (100 ft/day)

Henry Darcy - 1856 - Civil Engineer

- Dijon, France
- Asked to provide clean water supply for citizens
- dirty water (bacteria, sewage in water)
- decided to use sand to clean water

How do I choose sand size?

What if the fluid was molasses?

Be aware of temperature effects on conductivity for water.

 

landfill liner .005 ft/d

soil 20 ft/d

sand/gravel 700 ft/d