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Sensitivity Analysis and Identification of Parameters to the Van Genuchten Equation
Joint Authors
Chen, Guang-zhou
Jiao, Lifeng
Li, Xinhai
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-11-20
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Van Genuchten equation is the soil water characteristic curve equation used commonly, and identifying (estimating) accurately its parameters plays an important role in the study on the movement of soil water.
Selecting the desorption and absorption experimental data of silt loam from a northwest region in China as an instance, Monte-Carlo method was firstly applied to analyze sensitivity of the parameters and uncertainty of model so as to get the key parameters and posteriori parameter distribution to guide subsequent parameter identification.
Then, the optimization model of the parameters was set up, and a new type of intelligent algorithm-difference search algorithm was employed to identify them.
In order to overcome the fault that the base difference search algorithm needed more iterations and to further enhance the optimization performance, a hybrid algorithm, which coupled the difference search algorithm with simplex method, was employed to identification of the parameters.
By comparison with other optimization algorithms, the results show that the difference search algorithm has the following characteristics: good optimization performance, the simple principle, easy implement, short program code, and less control parameters required to run the algorithm.
In addition, the proposed hybrid algorithm outperforms the basic difference search algorithm on the comprehensive performance of algorithm.
American Psychological Association (APA)
Chen, Guang-zhou& Jiao, Lifeng& Li, Xinhai. 2016. Sensitivity Analysis and Identification of Parameters to the Van Genuchten Equation. Journal of Chemistry،Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1107828
Modern Language Association (MLA)
Chen, Guang-zhou…[et al.]. Sensitivity Analysis and Identification of Parameters to the Van Genuchten Equation. Journal of Chemistry No. 2016 (2016), pp.1-8.
https://search.emarefa.net/detail/BIM-1107828
American Medical Association (AMA)
Chen, Guang-zhou& Jiao, Lifeng& Li, Xinhai. Sensitivity Analysis and Identification of Parameters to the Van Genuchten Equation. Journal of Chemistry. 2016. Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1107828
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1107828