pastas.rfunc.HantushWellModel.gain
==================================

.. py:method:: pastas.rfunc.HantushWellModel.gain(p: pastas.typing.ArrayLike, r: float | None = None) -> float

   
   Return the gain of the HantushWellModel response function.

   :param p: Response function parameters [A, a, b] or [A, a, b, distance].
   :type p: array_like
   :param r: Distance from the pumping well to the observation well. If None, it is
             extracted from the parameters. Default is None.
   :type r: float, optional

   :returns: **gain** -- Gain of the response function.
   :rtype: float















   ..
       !! processed by numpydoc !!