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Lookup NU author(s): Professor Emilio Porcu
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In the present paper, an extensive cross-validation procedure, based on the analysis of numerical indices and graphical tools, is described and discussed. The procedure has been implemented in a software application designed to support practitioners in the variogram model assessment. It provides an extensive report, which summarizes a large post-processing stage and suggests how to interpret the performed analysis to rate the model to be validated. Besides classical accuracy indices, two new integrated tools based on the variogram of residuals are introduced, which take the spatial nature of the dataset into account. Finally, inspecting the summary report, the user can decide whether the considered model is satisfactory for his/her goals or it needs to be improved. Finally, a case study is presented related to the variogram assessment of groundwater level measured in a porous shallow aquifer of the Apulia Region (South-Italy).
Author(s): Barca E, Porcu E, Bruno D, Passarella G
Publication type: Article
Publication status: Published
Journal: Environmental Modelling & Software
Year: 2017
Volume: 87
Pages: 72-83
Print publication date: 01/01/2017
Online publication date: 11/11/2016
Acceptance date: 04/11/2016
ISSN (print): 1364-8152
ISSN (electronic): 1873-6726
Publisher: Pergamon Press
URL: https://doi.org/10.1016/j.envsoft.2016.11.004
DOI: 10.1016/j.envsoft.2016.11.004
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