Effective and efficient algorithm for multiobjective optimization of hydrologic models

Jasper A. Vrugt, Hoshin V. Gupta, Luis A. Bastidas, Willem Bouten, Soroosh Sorooshian

Research output: Contribution to journalArticle

434 Scopus citations

Abstract

Practical experience with the calibration of hydrologic models suggests that any single-objective function, no matter how carefully chosen, is often inadequate to properly measure all of the characteristics of the observed data deemed to be important. One strategy to circumvent this problem is to define several optimization criteria (objective functions) that measure different (complementary) aspects of the system behavior and to use multicriteria optimization to identify the set of nondominated, efficient, or Pareto optimal solutions. In this paper, we present an efficient and effective Markov Chain Monte Carlo sampler, entitled the Multiobjective Shuffled Complex Evolution Metropolis (MOSCEM) algorithm, which is capable of solving the multiobjective optimization problem for hydrologic models. MOSCEM is an improvement over the Shuffled Complex Evolution Metropolis (SCEM-UA) global optimization algorithm, using the concept of Pareto dominance (rather than direct single-objective function evaluation) to evolve the initial population of points toward a set of solutions stemming from a stable distribution (Pareto set). The efficacy of the MOSCEM-UA algorithm is compared with the original MOCOM-UA algorithm for three hydrologic modeling case studies of increasing complexity.

Original languageEnglish (US)
Pages (from-to)SWC51-SWC519
JournalWater Resources Research
Volume39
Issue number8
DOIs
StatePublished - Aug 2003

Keywords

  • Hydrologic models
  • Markov chain Monte Carlo
  • Multicriteria calibration
  • Parameter optimization
  • Pareto ranking
  • Population diversity

ASJC Scopus subject areas

  • Water Science and Technology

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