Numerical simulation of groundwater flow for a coastal plain in Japan: data collection and model calibration

He, Bin; Takase, Keiji; Wang, Yi

doi:10.1007/s00254-007-1125-8

Cited by 37 publications

(13 citation statements)

References 4 publications

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“…These studies have been generously cited in the literature (e.g., Ophori 1998Ophori , 1999Lutz et al 2007;He et al 2008). The validity of several of these models has undergone critical review in the past (e.g., Konikow and Bredehoeft 1992;Jackson 1992).…”

Section: Introductionmentioning

confidence: 98%

Groundwater flow modeling and particle tracking for chemical transport in the southern Voltaian aquifers

Yidana

2010

Environ Earth Sci

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Groundwater is the major source of water supply for most uses in the rural settlements in Ghana. A groundwater flow model was calibrated for some aquifers of the southern Voltaian sedimentary system under steadystate conditions. The objective was to determine estimates of the hydraulic conductivities of the different hydrostratigraphic units of the southern Voltaian, and the distribution of recharge from precipitation. Data on the stable isotopes of oxygen and hydrogen from the study area suggest that groundwater recharge in the area is from rainfall. The calibrated steady-state model suggests that aquifer hydraulic conductivities in the study area range from 1.19 to 6.3 m/day. Hydrostratigraphic unit specific hydraulic conductivities are discussed. The calibrated recharge ranges from 3.81e-05 m/day to 6.0e-04 m/day, which represents 0.9-6% of the precipitation in the form of rainfall. Six distinct flowpaths have been defined using particle tracking. The particle tracking simulation suggests travel times in the range of 380 to 5,199 years from recharge areas to discharge areas along the flowpaths identified. A contaminant dropped at the recharge areas in the central sections of the model area would travel at these rates along the flowpaths, assuming that advection is the dominant transport process. Inverse geochemical modeling indicates the dissolution of albite, K-feldspars and anorthite, respectively, along flowpaths I and IV. The inverse modeling along flowpaths I and IV suggest the dissolution of albite, K-feldspar and anorthite, respectively, at 1.085e-06, 3.16e-08 and 3.168e-07 mmol/year.

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Section: Introductionmentioning

confidence: 98%

Groundwater flow modeling and particle tracking for chemical transport in the southern Voltaian aquifers

Yidana

2010

Environ Earth Sci

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“…Dynamic groundwater curve simulation is the most commonly used approach to justify groundwater models [12][13][14]. Sahoo et al [15] and Dokou et al [16] used mean absolute error (MAE), root mean squared error (RMSE), the correlation coefficient (R), and the normalized RMSE (NRMSE) between calculated and observed groundwater head to evaluate the performance of a groundwater flow model.…”

Section: Introductionmentioning

confidence: 99%

“…To calibrate a larger-scale groundwater model, fitting at local scale is not enough; overall scope fitting is also necessary. Groundwater flow-field fitting and a groundwater budget were used in various ways to calibrate regional models by He et al [12] and Gebreyohannes et al [20]. Apparently, more constraints must be used to advance the calibration and validation of numerical groundwater models.…”

Section: Introductionmentioning

confidence: 99%

Improving the Reliability of Numerical Groundwater Modeling in a Data-Sparse Region

Hou

et al. 2018

Water

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Abstract:In data-sparse areas, due to the lack of hydrogeological data, numerical groundwater models have some uncertainties. In this paper, a nested model and a multi-index calibration method are used to improve the reliability of a numerical groundwater model in a data-sparse region, the Nalinggele River catchment in the Qaidam Basin. Referencing this key study area, a regional three-dimensional groundwater flow model is developed in a relatively complete hydrogeological unit. A complex set of calibration indices, including groundwater fitting errors, dynamic groundwater trends, spring discharges, overflow zone location, and groundwater budget status, are proposed to calibrate the regional numerical groundwater model in the Nalinggele alluvial-proluvial fan. Constrained by regional groundwater modeling results, a local-scale groundwater model is developed, and the hydrogeological parameters are investigated to improve modeling accuracy and reliability in this data-sparse region.

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“…Samplings were done monthly from October 2008-March 2009 which hydraulic heads and chloride concentrations data were collected from the well and boreholes. According to Anderson and Woessner (2002), in transient simulation six-ten months data are adequate to simulate and analyze case studies (as in this study) as such done by He et al (2008). On the other hand, one year data set is suitable for prediction using numerical groundwater model such as done by Lin et al (2008) in numerical simulation in Alabama Gulf Coast, USA.…”

Section: Introductionmentioning

confidence: 92%

Groundwater resources assessment using numerical model: A case study in low-lying coastal area

Praveena

Aris

2009

Int. J. Environ. Sci. Technol.

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ABSTRACT:The impacts of climate change and human pressure in groundwater have been greatest threats facing small islands. This paper represents a case study of groundwater responses towards the climate change and human pressures in Manukan Island Malaysia. SEAWAT-2000 was used for the simulations of groundwater response in study area. Simulations of six scenarios representing climate change and human pressures showed changes in hydraulic heads and chloride concentrations. Reduction in pumping rate and an increase in recharge rate can alter the bad effects of overdrafts in Manukan Island. In general, reduction in pumping rate and an increase in recharge rate are capable to restore and protect the groundwater resources in Manukan Island. Thus, for groundwater management options in Manukan Island, scenario 2 is capable to lessen the seawater intrusion into the aquifer and sustain water resources on a long-term basis. The selection of scenario 6 is the preeminent option during wet season. The output of this study provides a foundation which can be used in other small islands of similar hydrogeological condition for the purpose of groundwater resources protection.

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Numerical simulation of groundwater flow for a coastal plain in Japan: data collection and model calibration

Cited by 37 publications

References 4 publications

Groundwater flow modeling and particle tracking for chemical transport in the southern Voltaian aquifers

Groundwater flow modeling and particle tracking for chemical transport in the southern Voltaian aquifers

Improving the Reliability of Numerical Groundwater Modeling in a Data-Sparse Region

Groundwater resources assessment using numerical model: A case study in low-lying coastal area

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