Estimation of effective hydrogeological parameters in heterogeneous and anisotropic aquifers

Lin, Hsien-Tsung; Tan, Yih–Chi; Chen, Chu–Hui; Yu, Hwa‐Lung; Wu, Sheng-Yen; Ke, Kai-Yuan

doi:10.1016/j.jhydrol.2010.05.021

Cited by 27 publications

(14 citation statements)

References 35 publications

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“…However, Lin et al . () pointed out that a drawback of the ANN and PCA‐ANN approach (Lin and Chen ; Samani et al ., ) so the precision of the estimated parameters is insufficient. Therefore, Lin et al .…”

Section: Methods Of Analysis For Hydraulic Conductivity Tensormentioning

confidence: 99%

“…Therefore, Lin et al . () further modified the ANN (Lin and Chen, ) and PCA‐ANN (Samani et al ., ) approach to increase the precision of the estimation parameters for the anisotropic, homogenous aquifer. Hence, this study employed the modified ANN approach to estimate the effective aquifer parameters using drawdown data from six observation wells for the pumping tests.…”

Section: Methods Of Analysis For Hydraulic Conductivity Tensormentioning

confidence: 99%

“…Lin et al . () modified the concept of superimposed plots and extended the application of previous research (Lin and Chen, ; Samani et al ., ) so that the modified ANN and the modified PCA‐ANN were applied to estimate the parameters for homogeneous, anisotropic aquifers. In addition, Lin et al .…”

Section: Introductionmentioning

confidence: 92%

“…In addition, Lin et al . () pointed out that the precision optimized by the modified ANN approach is better than that with the modified PCA‐ANN approach.…”

Section: Introductionmentioning

confidence: 99%

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Multivariate approaches optimize locations of groundwater pumping facilities for different hydrogeological scales

Lin

Tan

Chen

et al. 2012

Hydrological Processes

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Abstract:A number of optimization approaches regarding the design location of groundwater pumping facilities in heterogeneous porous media have elicited little discussion. However, the location of groundwater pumping facilities is an important factor because it affects water resource usage. This study applies two optimization approaches to estimate the best recharge zone and suitable locations of the pumping facilities in southwestern Taiwan for different hydrogeological scales. First, for the regional scale, this study employs numerical modelling, MODFLOW-96, to simulate groundwater direction and the optimal recharge zone in the study area. Based on the model's calibration and verification results, this study preliminarily utilizes the simulated spatial direction of groundwater and compares the safe yield for each well group in order to determine the best recharge zone. Additionally, for the local scale, the micro-hydrogeological characteristics are considered before determining the design locations of the pumping facilities. According to drawdown record data from six observation wells derived from pumping tests at the best recharge area, this study further utilizes the modified artificial neural network approach to improve the accuracy of the estimation parameters as well as to analyse the direction and anisotropy of the hydraulic conductivities of an equivalent homogeneous aquifer. The results suggested that the best locations for the pumping facilities are along the more permeable major direction.

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Section: Methods Of Analysis For Hydraulic Conductivity Tensormentioning

confidence: 99%

Section: Methods Of Analysis For Hydraulic Conductivity Tensormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

“…In addition, Lin et al . () pointed out that the precision optimized by the modified ANN approach is better than that with the modified PCA‐ANN approach.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multivariate approaches optimize locations of groundwater pumping facilities for different hydrogeological scales

Lin

Tan

Chen

et al. 2012

Hydrological Processes

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“…Several studies have been conducted to derive the adjoint equations for the transmissivity inverse problem [14,28,50,64]. The adjoint state equation related to Eq.…”

Section: Inverse Problemmentioning

confidence: 99%

Image-guided inversion in steady-state hydraulic tomography

Ahmed

Zhou

Jardani

et al. 2015

Advances in Water Resources

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a b s t r a c tIn steady-state hydraulic tomography, the head data recorded during a series of pumping or/and injection tests can be inverted to determine the transmissivity distributions of an aquifer. This inverse problem is usually under-determined and ill-posed. We propose to use structural information inferred from a guiding image to constrain the inversion process. The guiding image can be drawn from soft data sets such as seismic and ground penetrating radar sections or from geological cross-sections inferred from the wells and some geological expertise. The structural information is extracted from the guiding image through some digital image analysis techniques. Then, it is introduced into the inversion process of the head data as a weighted four direction smoothing matrix used in the regularizer. Such smoothing matrix allows applying the smoothing along the structural features. This helps preserving eventual drops in the hydraulic properties. In addition, we apply a procedure called image-guided interpolation. This technique starts with the tomogram obtained from the image-guided inversion and focus this tomogram. These new approaches are applied on four synthetic toy problems. The hydraulic distributions estimated from the image-guided inversion are closer to the true transmissivity model and have higher resolution than those computed from a classical Gauss-Newton method with uniform isotropic smoothing.

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Recognizing groundwater DNAPL contaminant source and aquifer parameters using parallel heuristic search strategy based on Bayesian approach

Wang

2020

Stoch Environ Res Risk Assess

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Estimation of effective hydrogeological parameters in heterogeneous and anisotropic aquifers

Cited by 27 publications

References 35 publications

Multivariate approaches optimize locations of groundwater pumping facilities for different hydrogeological scales

Multivariate approaches optimize locations of groundwater pumping facilities for different hydrogeological scales

Image-guided inversion in steady-state hydraulic tomography

Recognizing groundwater DNAPL contaminant source and aquifer parameters using parallel heuristic search strategy based on Bayesian approach

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