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()
  • 04 estimate steady
  • 04 estimate steady
  • 04 estimate steady
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/stable/examples/Estimate_thiem/2023-04-18_10-39-54_db.csv' created.
Burn-in sampling completed...
Starting Complex Evolution...
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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: 5054
NUMBER OF DISCARDED TRIALS: 20
NORMALIZED GEOMETRIC RANGE = 0.185260
THE BEST POINT HAS IMPROVED IN LAST 100 LOOPS BY 100000.000000 PERCENT

*** Final SPOTPY summary ***
Total Duration: 1.03 seconds
Total Repetitions: 5054
Minimal objective value: 0.0672645
Corresponding parameter setting:
transmissivity: -9.21029
******************************

Best parameter set:
transmissivity=-9.210293557343707

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

estimation.gen_setup(dummy=True)
estimation.sensitivity()
  • FAST total sensitivity shares
  • 04 estimate steady
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/stable/examples/Estimate_thiem/2023-04-18_10-39-56_sensitivity_db.csv' created.

*** Final SPOTPY summary ***
Total Duration: 0.06 seconds
Total Repetitions: 260
Minimal objective value: 83.5729
Corresponding parameter setting:
transmissivity: -9.24053
dummy: 0.219783
Maximal objective value: 2.57371e+06
Corresponding parameter setting:
transmissivity: -16.0629
dummy: 0.690217
******************************

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Total running time of the script: ( 0 minutes 3.386 seconds)

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