def calc_overland_flow(precipExcess, satFrac):
    ' Calculate overland flow (surface runoff)\n\n    Parameters\n    ----------\n    precipExcess : int or float\n        Excess precipitation [mm day^-1]\n    satFrac : float\n        Saturated fraction of the unsaturated zone\n    Returns\n    -------\n    overlandFlow : float\n        Overland flow (surface runoff) [mm day^-1]\n    '
    overlandFlow = (precipExcess * satFrac)
    return overlandFlow
Calculate overland flow (surface runoff)

Parameters
----------
precipExcess : int or float
    Excess precipitation [mm day^-1]
satFrac : float
    Saturated fraction of the unsaturated zone
Returns
-------
overlandFlow : float
    Overland flow (surface runoff) [mm day^-1]
def calc_overland_flow(precipExcess, satFrac):
    ' Calculate overland flow (surface runoff)\n\n    Parameters\n    ----------\n    precipExcess : int or float\n        Excess precipitation [mm day^-1]\n    satFrac : float\n        Saturated fraction of the unsaturated zone\n    Returns\n    -------\n    overlandFlow : float\n        Overland flow (surface runoff) [mm day^-1]\n    '
    overlandFlow = (precipExcess * satFrac)
    return overlandFlow