Uniformity Coefficient (\( UC \)):

\[ UC = 1 - \left( \frac{y}{d} \right) \]

Where:

• \( UC \) is the uniformity coefficient.
• \( y \) is the average of the absolute values of the deviation in depth of water infiltrated or caught, in meters (m).
• \( d \) is the average depth of water infiltrated or caught, in meters (m).