On the development of a new methodology in sub-surface parameterisation on the calibration of groundwater models

1st International Conference on Advances in Environmental Engineering

生态环境科学

Klaas, D.K.S.Y.^1,2,3 ; Imteaz, M.A.^1 ; Sudiayem, I.^3 ; Klaas, E.M.E.^3 ; Klaas, E.C.M.^3

Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne

VIC, Australia^1

Department of Civil Engineering, Politeknik Negeri Kupang, Indonesia^2

Department of Health, Science and Technology, Klinik Garuda, Malang, Indonesia^3

关键词: Eogenetic karsts;    Geometric feature;    Groundwater modeling;    Groundwater modelling;    Groundwater models;    Hydraulic gradients;    Model performance;    Physically based;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/92/1/012026/pdf
DOI  :  10.1088/1755-1315/92/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In groundwater modelling, robust parameterisation of sub-surface parameters is crucial towards obtaining an agreeable model performance. Pilot point is an alternative in parameterisation step to correctly configure the distribution of parameters into a model. However, the methodology given by the current studies are considered less practical to be applied on real catchment conditions. In this study, a practical approach of using geometric features of pilot point and distribution of hydraulic gradient over the catchment area is proposed to efficiently configure pilot point distribution in the calibration step of a groundwater model. A development of new pilot point distribution, Head Zonation-based (HZB) technique, which is based on the hydraulic gradient distribution of groundwater flow, is presented. Seven models of seven zone ratios (1, 5, 10, 15, 20, 25 and 30) using HZB technique were constructed on an eogenetic karst catchment in Rote Island, Indonesia and their performances were assessed. This study also concludes some insights into the trade-off between restricting and maximising the number of pilot points and offers a new methodology for selecting pilot point properties and distribution method in the development of a physically-based groundwater model.