Groundwater Hydrology

Darcy's Law ($v = -K \frac{dh}{dl}$) for flow through porous media is valid provided the Reynolds number based on mean grain diameter ($Re = \frac{v d}{\nu}$) is:

Options:

• (A) Less than 1 to 10 (strictly laminar regime)
• (B) Greater than 2000 (turbulent)
• (C) Equal to infinity
• (D) Independent of velocity