The expression for the discharge (Q) through a flow net for isotropic soils is given by

[ $N_{F}$ = Number of flow channels, $N_{D}$ = Number of potential drops, H= Total hydraulic head causing flow, K= A constant]

- 1
  
  $Q = K H \times \frac{N_{F}}{N_{D}}$
- 2
  
  $K H \sqrt{\frac{N_{F}}{N_{D}}}$
- 3
  
  $Q = K H {(\frac{N_{F}}{N_{D}})}^{2}$
- 4
  
  $K H {(\frac{N_{F}}{N_{D}})}^{3}$

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