Hantush#
- class Hantush(use_numba=False, quad=False)[source]#
The Hantush well function, using the standard A, a, b parameters.
- Parameters
up (bool or None, optional) – indicates whether a positive stress will cause the head to go up (True, default) or down (False), if None the head can go both ways.
meanstress (float) – mean value of the stress, used to set the initial value such that the final step times the mean stress equals 1
cutoff (float) – proportion after which the step function is cut off. default is 0.999.
Notes
The impulse response function is:
\[\theta(t) = \frac{A}{2t \text{K}_0\left(2\sqrt{b} \right)} \exp(-t/a - ab/t)\]where A, a, and b are parameters.
The implementation used here is explained in Veling and Maas (2010).
References
- veling_2010
Veling, E. J. M., & Maas, C. (2010). Hantush well function revisited. Journal of hydrology, 393(3), 381-388.
Methods#
Method to return the block function. |
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Get initial parameters and bounds. |
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Internal method to determine the times at which to evaluate the step-response, from t=0. |
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Method to get the response time for a certain cutoff. |
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Method to return the impulse response function. |
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Method to return the step function. |