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Autumn 2015, Page 347-472
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Winter 2015, Page 1-116
Hosseini, Z., Nakhaie, M. (2015). Estimation of groundwater level using a hybrid genetic algorithm-neural network. Pollution, 1(1), 9-21. doi: 10.7508/pj.2015.01.002
Ziba Hosseini; Mohammad Nakhaie. "Estimation of groundwater level using a hybrid genetic algorithm-neural network". Pollution, 1, 1, 2015, 9-21. doi: 10.7508/pj.2015.01.002
Hosseini, Z., Nakhaie, M. (2015). 'Estimation of groundwater level using a hybrid genetic algorithm-neural network', Pollution, 1(1), pp. 9-21. doi: 10.7508/pj.2015.01.002
Hosseini, Z., Nakhaie, M. Estimation of groundwater level using a hybrid genetic algorithm-neural network. Pollution, 2015; 1(1): 9-21. doi: 10.7508/pj.2015.01.002

Estimation of groundwater level using a hybrid genetic algorithm-neural network

Article 2, Volume 1, Issue 1, Winter 2015, Page 9-21  XML PDF (1.43 MB)
Document Type: Original Research Paper
DOI: 10.7508/pj.2015.01.002
Authors
Ziba Hosseini email 1; Mohammad Nakhaie2
1Department of Geology, Faculty of Natural Sciences, University of Tabriz, Tabriz, NW Iran
2Faculty of Geoscience, Kharazmi University.Department of Geology, Faculty of Geosciences, Kharazmi University, Tehran, Iran
Abstract
In this paper, we present an application of evolved neural networks using a real coded genetic algorithm for simulations of monthly groundwater levels in a coastal aquifer located in the Shabestar Plain, Iran. After initializing the model with groundwater elevations observed at a given time, the developed hybrid genetic algorithm-back propagation (GA-BP) should be able to reproduce groundwater level variations using the external input variables, including rainfall, average discharge, temperature, evaporation and annual time series. To achieve this purpose, the hybrid GA-BP algorithm is first calibrated on a training dataset to perform monthly predictions of future groundwater levels using past observed groundwater levels and additional inputs. Simulations are then produced on another data set by iteratively feeding back the predicted groundwater levels, along with real external data. This modelling algorithm has been compared with the individual back propagation model (ANN-BP), which demonstrates the capability of the hybrid GA-BP model. The later provides better results in estimation of groundwater levels compared to the individual one. The study suggests that such a network can be used as a viable alternative to physical-based models in order to simulate the responses of the aquifer under plausible future scenarios, or to reconstruct long periods of missing observations provided past data for the influencing variables is available.
Keywords
ANN; Coastal Aquifer; GA-BP; Groundwater level; simulation
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