Soft Computing Ensemble Models Based on Logistic Regression for Groundwater Potential Mapping

Soft Computing Ensemble Models Based on Logistic Regression for Groundwater Potential Mapping

Phong Tung Nguyen;Duong Hai Ha;Mohammadtaghi Avand;Abolfazl Jaafari;Huu Duy Nguyen;Nadhir Al-Ansari;Tran Van Phong;Rohit Sharma;Raghvendra Kumar;Hiep Van Le;Lanh Si Ho;Indra Prakash;Binh Thai Pham;Nguyen, Phong Tung;Ha, Duong Hai;Avand, Mohammadtaghi;Jaafari, Abolfazl;Nguyen, Huu Duy;Al-Ansari, Nadhir;Van Phong, Tran;Sharma, Rohit;Kumar, Raghvendra;Le, Hiep Van;Ho, Lanh Si;Prakash, Indra;Pham, Binh Thai;
applied sciences 2020 Vol. 10 pp. 2469-
214
nguyen2020appliedsoft

Abstract

Groundwater potential maps are one of the most important tools for the management of groundwater storage resources. In this study, we proposed four ensemble soft computing models based on logistic regression (LR) combined with the dagging (DLR), bagging (BLR), random subspace (RSSLR), and cascade generalization (CGLR) ensemble techniques for groundwater potential mapping in Dak Lak Province, Vietnam. A suite of well yield data and twelve geo-environmental factors (aspect, elevation, slope, curvature, Sediment Transport Index, Topographic Wetness Index, flow direction, rainfall, river density, soil, land use, and geology) were used for generating the training and validation datasets required for the building and validation of the models. Based on the area under the receiver operating characteristic curve (AUC) and several other validation methods (negative predictive value, positive predictive value, root mean square error, accuracy, sensitivity, specificity, and Kappa), it was revealed that all four ensemble learning techniques were successful in enhancing the validation performance of the base LR model. The ensemble DLR model (AUC = 0.77) was the most successful model in identifying the groundwater potential zones in the study area, followed by the RSSLR (AUC = 0.744), BLR (AUC = 0.735), CGLR (AUC = 0.715), and single LR model (AUC = 0.71), respectively. The models developed in this study and the resulting potential maps can assist decision-makers in the development of effective adaptive groundwater management plans.

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111001
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