`wtConfigureDrainage.Rd`

Define drainage-related WTAQ parameters

wtConfigureDrainage(idra = 2, alpha = c(), acc = 5, akk = 31.7, amm = 100, axmm = 10)

idra | Type of drainage at water table. Enter 0 if AQTYPE = CONFINED. Three options are provided: IDRA = 0: Instantaneous drainage. IDRA = 1: Gradual drainage. IDRA = 2: Drainage with unsaturated-zone characterization. |
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alpha | Only used if idra = 1. Drainage constants, in units of inverse time. Maximum of 5 values is allowed. |

acc | Only used if idra = 2. Soil-moisture retention exponent, in units of inverse length. |

akk | Only used if idra = 2. Relative hydraulic-conductivity exponent, in units of inverse length. The value specified must be greater than or equal to that specified for ACC. |

amm | Only used if idra = 2. Initial unsaturated-zone thickness above the capillary fringe, in units of length. |

axmm | Only used if idra = 2. The unsaturated-zone thickness above the capillary fringe above which an assumption of an infinitely thick unsaturated-zone thickness is assumed, in units of length. |

list with elements *idra*, *alpha*, *acc*, *akk*,
*amm*, *axmm*, representing WTAQ parameters related to drainage.
See descriptions in Arguments section.