مجله ژئوفیزیک ایران

مجله ژئوفیزیک ایران

Evaluation of the groundwater potential of Ogbomoso, Southwestern Nigeria, using an adaptive neuro-fuzzy inference system optimized by three metaheuristic algorithms

نوع مقاله : مقاله پژوهشی‌

نویسندگان
1 M.Sc. Graduate, Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria
2 Ph.D. , Department of Physics, Ambrose Alli University Ekpoma, Edo State, Nigeria
چکیده
Groundwater is a significant driver of water supply considering its constant accessibility, intrinsic quality, and ease of immediate diversion to disadvantaged areas. The bulk of the Ogbomoso population relies on surface water because of normative groundwater investigation, which is a laborious and resource-intensive process. Over the last decade, the use of an adaptive neuro-fuzzy inference system (ANFIS) has garnered enthusiastic acceptance in a variety of research domains. This study aimed to evaluate groundwater potential in Ogbomoso, Nigeria, using ANFIS in a geographic information system coupled with three metaheuristic optimizing algorithms: the genetic algorithm (GA), particle swarm optimization (PSO), and the firefly algorithm (FA). To facilitate groundwater potential mapping (GPM) in the research area, a database of 165 wells with 8 predictive parameters was created. Thirty percent (49) of the 165 well locations were designated for the validation set, while the remaining seventy percent (116) were designated for the training set. The slope, lineament density, lithology, overburden thickness, bedrock relief, coefficient of anisotropy, hydraulic conductivity, and transmissivity were the eight groundwater variable parameters generated for modeling. The findings showed that each of the models had good prediction capability; nonetheless, the ANFIS-GA has the strongest predicting effectiveness with a correlation level of r = 0.8 (80%), followed by both the ANFIS-PSO and the ANFIS-FA with r = 0.77 (77%). The groundwater potential index developed for the study region was zoned into low (0.77–1.63) (30%), moderate (1.63–1.74) (25%), and high (1.74–2.50) (45%) using the ANFIS improved by the GA method. The linear correlation method was used to validate the model using 110 water columns from wells in the study area. The findings of this study demonstrate that ANFIS models paired with metaheuristic algorithmic optimization can be an invaluable tool for making decisions for groundwater utilization and monitoring.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Evaluation of the groundwater potential of Ogbomoso, Southwestern Nigeria, using an adaptive neuro-fuzzy inference system optimized by three metaheuristic algorithms

نویسندگان English

Pelumi Timothy Fajemilo 1
Kesyton Oyamenda Ozegin 2
1 M.Sc. Graduate, Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria
2 Ph.D. Graduate, Department of Physics, Ambrose Alli University Ekpoma, Edo State, Nigeria
چکیده English

Groundwater is a significant driver of water supply considering its constant accessibility, intrinsic quality, and ease of immediate diversion to disadvantaged areas. The bulk of the Ogbomoso population relies on surface water because of normative groundwater investigation, which is a laborious and resource-intensive process. Over the last decade, the use of an adaptive neuro-fuzzy inference system (ANFIS) has garnered enthusiastic acceptance in a variety of research domains. This study aimed to evaluate groundwater potential in Ogbomoso, Nigeria, using ANFIS in a geographic information system coupled with three metaheuristic optimizing algorithms: the genetic algorithm (GA), particle swarm optimization (PSO), and the firefly algorithm (FA). To facilitate groundwater potential mapping (GPM) in the research area, a database of 165 wells with 8 predictive parameters was created. Thirty percent (49) of the 165 well locations were designated for the validation set, while the remaining seventy percent (116) were designated for the training set. The slope, lineament density, lithology, overburden thickness, bedrock relief, coefficient of anisotropy, hydraulic conductivity, and transmissivity were the eight groundwater variable parameters generated for modeling. The findings showed that each of the models had good prediction capability; nonetheless, the ANFIS-GA has the strongest predicting effectiveness with a correlation level of r = 0.8 (80%), followed by both the ANFIS-PSO and the ANFIS-FA with r = 0.77 (77%). The groundwater potential index developed for the study region was zoned into low (0.77–1.63) (30%), moderate (1.63–1.74) (25%), and high (1.74–2.50) (45%) using the ANFIS improved by the GA method. The linear correlation method was used to validate the model using 110 water columns from wells in the study area. The findings of this study demonstrate that ANFIS models paired with metaheuristic algorithmic optimization can be an invaluable tool for making decisions for groundwater utilization and monitoring.

کلیدواژه‌ها English

Machine learning
linear and non-linear models
ANFIS
genetic algorithm
performance evaluation
groundwater potential
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