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Automatic multi-objective calibration of a rainfall runoff model for the Fitzroy Basin, Queensland, Australia

This paper presents a large scale hydrological model for the Fitzroy Basin using the MIKE 11 NAM modelling system. This model simulates the rainfall runoff processes for the three different and interrelated storages which are surface storage, root zone storage and groundwater storage. The parameters of such model cannot be obtained directly from measurable quantities of catchment characteristics. Hence model calibration is required to get the model parameters. Manual calibration is very time consuming and it only focuses on a single objective function. Thus tradeoff exists between the different objectives. For this study, an automatic calibration was done considering the four multiple objectives and obtained the optimal values of the model parameters for each catchment. The simulated and observed discharge hydrographs show a reasonable good match for each sub-catchment. Moreover model reliability was evaluated using the statistical methods Index of Agreement (IA) and Efficiency Index (EI). The IA and EI obtained 0.821-0.951 and 0.849-0.961 for different sub-catchments.

History

Volume

4

Issue

3

Start Page

311

End Page

315

Number of Pages

5

ISSN

2010-0264

Location

Singapore

Publisher

IACSIT

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Centre for Plant and Water Science; Institute for Resource Industries and Sustainability (IRIS); School of Engineering and Technology (2013- );

Era Eligible

Yes

Journal

International journal of environmental science and development.