volumes:
  sand:
    index: 0
    type: MvG
    parameters:
      alpha: -2.3
      n: 4.17
      k0: 2.2E-5
      theta_r: 0.03
      theta_s: 0.31
      tau: -1.1

  silt:
    index: 1
    type: MvG
    parameters:
      alpha: -0.7
      n: 1.3
      k0: 1.0E-5
      theta_r: 0.01
      theta_s: 0.41
      tau: 0.0

scaling:
  type: None