Efficient calibration of a conceptual hydrological model based on the enhanced Gauss - Levenberg - Marquardt procedure

Andrej Vidmar (Author), Mitja Brilly (Author), Klaudija Sapač (Author), Andrej Kryžanowski (Author)

Abstract

Various models were developed in the past to simulate different hydrological processes. However, discrepancies between simulated and observed values are still significant and pose a challenge to many researchers. Models contain many parameters that cannot be directly measured. The values of most of these parameters are determined in the calibration process conditioning the efficiency of such models. This paper introduces the use of the enhanced Gauss - Levenberg - Marquardt (GLM) procedure in combination with the singular value decomposition (SVD) and Tikhonov regularization to improve the process of hydrological model calibration. The procedure is tested on a freely available hydrological model using a synthetic dataset. Based on several efficiency measures, the GLM procedure, in combination with SVD and Tikhonov regularization, was found to provide efficient model history matching and almost perfect parameter calibration. Moreover, by comparing the results of the proposed procedure with the results of global evolutionary calibration procedures, it was found that the only calibration using the combined GLM procedure gave a perfect fit in low flows. Last but not least, the noise in the calculation results with the combined GLM method was practically the same in either the calibration or validation procedure, suggesting that only computational noise remained in the results.

Keywords

učinkovitost kalibracijskega modela;PEST;HBV-light;Gauss-Levenberg-Marquardt postopek;SVD;Tikhonova regularizacija;paralelno računanje;hidrologija;calibration model efficiency;PEST - parameter estimation tool;Gauss - Levenberg - Marquardt procedure;Tikhonov regularization;parallel computing;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
UDC:	556:004
COBISS:	18190595
ISSN:	2076-3417
Parent publication:	Applied sciences
Views:	564
Downloads:	350
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	učinkovitost kalibracijskega modela;PEST;HBV-light;Gauss-Levenberg-Marquardt postopek;SVD;Tikhonova regularizacija;paralelno računanje;hidrologija;
Type (COBISS):	Article
Pages:	str. 1-20
Volume:	ǂLetn. ǂ10
Issue:	ǂšt. ǂ11
Chronology:	2020
DOI:	10.3390/app10113841
ID:	11841670