Estimate steady homogeneous parameters

Here we estimate transmissivity from the quasi steady state of a pumping test campaign with the classical thiem solution.

import welltestpy as wtp

campaign = wtp.load_campaign("Cmp_UFZ-campaign.cmp")
estimation = wtp.estimate.Thiem("Estimate_thiem", campaign, generate=True)
estimation.run()

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Out:

Initializing the  Shuffled Complex Evolution (SCE-UA) algorithm  with  5000  repetitions
The objective function will be minimized
Starting burn-in sampling...
Initialize database...
['csv', 'hdf5', 'ram', 'sql', 'custom', 'noData']
* Database file '/home/docs/checkouts/readthedocs.org/user_builds/welltestpy/checkouts/v1.0.3/examples/Estimate_thiem/2021-02-18_17-00-50_db.csv' created.
Burn-in sampling completed...
Starting Complex Evolution...
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Skipping saving
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*** OPTIMIZATION SEARCH TERMINATED BECAUSE THE LIMIT
ON THE MAXIMUM NUMBER OF TRIALS
5000
HAS BEEN EXCEEDED.
SEARCH WAS STOPPED AT TRIAL NUMBER: 5031
NUMBER OF DISCARDED TRIALS: 12
NORMALIZED GEOMETRIC RANGE = 0.371009
THE BEST POINT HAS IMPROVED IN LAST 100 LOOPS BY 100000.000000 PERCENT

*** Final SPOTPY summary ***
Total Duration: 1.15 seconds
Total Repetitions: 5031
Minimal objective value: 0.0672645
Corresponding parameter setting:
mu: -9.21029
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Best parameter set:
mu=-9.210293557328503
/home/docs/.pyenv/versions/3.7.9/lib/python3.7/site-packages/numpy/core/_asarray.py:136: VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences (which is a list-or-tuple of lists-or-tuples-or ndarrays with different lengths or shapes) is deprecated. If you meant to do this, you must specify 'dtype=object' when creating the ndarray
  return array(a, dtype, copy=False, order=order, subok=True)

since we only have one parameter, we need a dummy parameter to estimate sensitivity

estimation.gen_setup(dummy=True)
estimation.sensitivity()

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Out:

Initializing the  Fourier Amplitude Sensitivity Test (FAST)  with  260  repetitions
Starting the FAST algotrithm with 260 repetitions...
Creating FAST Matrix
Initialize database...
['csv', 'hdf5', 'ram', 'sql', 'custom', 'noData']
* Database file '/home/docs/checkouts/readthedocs.org/user_builds/welltestpy/checkouts/v1.0.3/examples/Estimate_thiem/2021-02-18_17-00-53_sensitivity_db.csv' created.

*** Final SPOTPY summary ***
Total Duration: 0.08 seconds
Total Repetitions: 260
Minimal objective value: 70.3131
Corresponding parameter setting:
mu: -9.18413
dummy: 0.0502832
Maximal objective value: 2.37002e+06
Corresponding parameter setting:
mu: -15.9805
dummy: 0.0783825
******************************

260
Parameter First Total
mu 0.787023 0.978041
dummy 0.002027 0.055099
260