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SPOTting Model Parameters Using a Ready-Made Python Package

Author

Listed:
  • Tobias Houska
  • Philipp Kraft
  • Alejandro Chamorro-Chavez
  • Lutz Breuer

Abstract

The choice for specific parameter estimation methods is often more dependent on its availability than its performance. We developed SPOTPY (Statistical Parameter Optimization Tool), an open source python package containing a comprehensive set of methods typically used to calibrate, analyze and optimize parameters for a wide range of ecological models. SPOTPY currently contains eight widely used algorithms, 11 objective functions, and can sample from eight parameter distributions. SPOTPY has a model-independent structure and can be run in parallel from the workstation to large computation clusters using the Message Passing Interface (MPI). We tested SPOTPY in five different case studies to parameterize the Rosenbrock, Griewank and Ackley functions, a one-dimensional physically based soil moisture routine, where we searched for parameters of the van Genuchten-Mualem function and a calibration of a biogeochemistry model with different objective functions. The case studies reveal that the implemented SPOTPY methods can be used for any model with just a minimal amount of code for maximal power of parameter optimization. They further show the benefit of having one package at hand that includes number of well performing parameter search methods, since not every case study can be solved sufficiently with every algorithm or every objective function.

Suggested Citation

  • Tobias Houska & Philipp Kraft & Alejandro Chamorro-Chavez & Lutz Breuer, 2015. "SPOTting Model Parameters Using a Ready-Made Python Package," PLOS ONE, Public Library of Science, vol. 10(12), pages 1-22, December.
    • Handle: RePEc:plo:pone00:0145180
    DOI: 10.1371/journal.pone.0145180
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    References listed on IDEAS

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    1. Haga, Chihiro & Hotta, Wataru & Inoue, Takahiro & Matsui, Takanori & Aiba, Masahiro & Owari, Toshiaki & Suzuki, Satoshi N. & Shibata, Hideaki & Morimoto, Junko, 2022. "Modeling Tree Recovery in Wind-Disturbed Forests with Dense Understory Species under Climate Change," Ecological Modelling, Elsevier, vol. 472(C).
    2. A. Chamorro & P. Kraft & G. Pauer & J.-F. Exbrayat & L. Breuer, 2017. "Effect of (quasi-)optimum model parameter sets and model characteristics on future discharge projection of two basins from Europe and Asia," Climatic Change, Springer, vol. 142(3), pages 559-573, June.
    3. Myrgiotis, Vasileios & Blei, Emanuel & Clement, Rob & Jones, Stephanie K. & Keane, Ben & Lee, Mark A. & Levy, Peter E. & Rees, Robert M. & Skiba, Ute M. & Smallman, Thomas Luke & Toet, Sylvia & Willia, 2020. "A model-data fusion approach to analyse carbon dynamics in managed grasslands," Agricultural Systems, Elsevier, vol. 184(C).

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