期刊
ENVIRONMENTAL MODELLING & SOFTWARE
卷 147, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envsoft.2021.105237
关键词
Asynchronous parallel; Knowledge-based early-truncation; Surrogate-based optimization; Automatic calibration; Computationally expensive groundwater model
类别
资金
- National Natural Science Foundation of China [52000100]
- NSF [CISE 1116298, 1049033]
- National University of Singapore
- NCAR's Computational and Information Systems Laboratory - National Science Foundation
Automatic calibration is widely used in hydrological models to estimate parameters by minimizing the discrepancy between field data and simulation. This study introduces a new asynchronous parallel surrogate-assisted optimization algorithm, showing significantly better performance in efficiency and robustness compared to other algorithms. This asynchronous algorithm achieves the same results with 40%-70% less computation time than its synchronous counterpart.
Automatic calibration is widely used to estimate parameters in hydrological models. The main idea is to use optimization algorithms to minimize the discrepancy between field data and simulation prediction. This process involves iterative exchanges of a parameter set chosen by the optimization and simulation. However, for computationally expensive models, such as groundwater flow and transport models, the calibration process may be extremely computationally demanding. In this study, we introduce and demonstrate a new asynchronous parallel surrogate-assisted optimization algorithm with an early truncation feature and different knowledge extraction strategies (SO-AET-k). Results show that our asynchronous algorithm performs significantly better than the synchronous analogue (SO-SP), requiring only 40%-70% of the computation time to achieve the same averaged results. In addition, various knowledge extraction strategies of the asynchronous SO-AET-k are tested. In comparisons with two other algorithms, SCE-UA and APPSPACK, asynchronous SO-AET-k shows significantly better performance in terms of both efficiency and robustness.
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