An automated decision support system for aided assessment of variogram models. (January 2017)

• Record Type: Journal Article
• Authors: Barca, Emanuele; Porcu, Emilio; Bruno, Delia; Passarella, Giuseppe
• Is Part Of: Environmental modelling & software. Volume 87(2017)
• Page Start: 72
• Page End: 83
• Publication Date: 2017-01
• Subjects: Geostatistics -- Extensive cross-validation -- Rank coefficient of spatial correlation -- Decision-support system; Environmental monitoring -- Computer programs -- Periodicals; Ecology -- Computer simulation -- Periodicals; Digital computer simulation -- Periodicals; Computer software -- Periodicals; Environmental Monitoring -- Periodicals; Computer Simulation -- Periodicals; Environnement -- Surveillance -- Logiciels -- Périodiques; Écologie -- Simulation, Méthodes de -- Périodiques; Simulation par ordinateur -- Périodiques; Logiciels -- Périodiques; Computer software; Digital computer simulation; Ecology -- Computer simulation; Environmental monitoring -- Computer programs; Periodicals; Electronic journals; 363.70015118
• DOI: 10.1016/j.envsoft.2016.11.004
• Languages: English
• ISSNs: 1364-8152

Abstract

Abstract: 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). Highlights: A new extensive cross-validation procedure is described and implemented. An automated decision support system for supporting practitioners with the variogram calibration and validation is presented. Two novel tools for the spatial correlation assessment are defined and implemented.