MODFLOW/MT3DMS–Based Simulation of Variable‐Density Ground Water Flow and Transport

Langevin, Christian D.; Guo, Weixing

doi:10.1111/j.1745-6584.2005.00156.x

Cited by 159 publications

(109 citation statements)

References 43 publications

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“…It is a commonly used (e.g., Langevin and Guo, 2006;Li et al, 2009) USGS computer code that couples MODFLOW-2000 (Harbaugh et al, 2000) for groundwater flow and MT3DMS (Zheng and Wang, 1999;Prommer et al, 2001) for solute transport. The model uses the equivalent freshwater head formulation of the groundwater flow equation.…”

Section: Variable-density Groundwater Flowmentioning

confidence: 99%

Numerical experiments on interactions between wave motion and variable-density coastal aquifers

Bakhtyar

Barry

Brovelli

2012

Coastal Engineering

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A comprehensive two-dimensional (cross-shore) process-based numerical model of nearshore hydrodynamics (based on the Navier-Stokes equations, k-ε turbulence closure and the Volume-Of-Fluid method), beach morphology, and variable-density groundwater flow (SEAWAT-2000) was developed. This model, which was applied at the field scale, relaxes simplifications in existing models that do not include such detailed mechanistic descriptions. Numerical experiments were conducted to investigate the effects of varying aquifer, beach and wave characteristics (e.g., inland groundwater head, sand grain size, different wave heights and periods) on the coupled system. Spilling and plunging breakers on dissipative and intermediate beaches were simulated. For a given set of boundary conditions, the model was run for 1 y without the hydrodynamic sub-model to achieve a realistic salt-/freshwater interface. Then, the hydrodynamic component was run for 15 min and the model results analyzed. The main features considered were groundwater circulation, saltwater wedge position, in/exfiltration across the beach face, and beach morphology. The predictions of the numerical model agree well with existing understanding and experimental measurements. For an inland watertable that is lower than the still water level (SWL), such that the groundwater flow is mainly landward, on both coarse and fine sand beaches the addition of wave motion moves the saltwater wedge further landward. For an inland watertable that is higher than the SWL, the opposite behavior occurred. The numerical experiments showed that more sediment transport takes place on intermediate beaches than on dissipative beaches. In addition, beach profile variations are greater under plunging breakers, while coarse sand beaches are steeper than fine sand beaches for the same wave conditions. There is a strong correlation between in/exfiltration and beach face deposition/erosion for the coarse beaches, while in/exfiltration has a slight effect on sediment transport for fine beaches. The model is capable of simulating the short-term evolution of foreshore profile changes, and beach 3 watertable and saltwater wedge movement due to interactions between wave motion and coastal groundwater. IntroductionMost previous investigations concerned with modeling of interactions between ocean water and coastal groundwater focused on tide-induced watertable fluctuations, neglecting high-frequency wave-induced oscillations and variable-density groundwater flow (e.g., Teo et al., 2003;Brovelli et al., 2007;Robinson et al., 2007bRobinson et al., , 2009Slooten et al., 2010;Li et al., , 2007Xin et al., 2010). However, given the interplay of mechanisms inherent in coastal processes -mixing of fresh-and seawater driven by waves, sediment transport and beach profile changes -it is not possible to extrapolate readily existing results to realistic coastal zone behavior.Waves in the nearshore zone are an important forcing on sediments and groundwater behavior. While waves induce instantaneous pore wat...

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Section: Variable-density Groundwater Flowmentioning

confidence: 99%

Numerical experiments on interactions between wave motion and variable-density coastal aquifers

Bakhtyar

Barry

Brovelli

2012

Coastal Engineering

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“…De tailed re search has al lowed doc u ment ing zones of shal low and even subsurface as cent in flu ence in the ar eas of salt pil lows (Kucharski and Twarogowski, 1995;Kaczor, 2006), sea coasts (Dowgia³³o, 1965;Burzyñski et al, 1999;Krawiec, 2013) and salt domes (Kloppmann et al, 2001;Górski and Rasa³a, 2008). Iden ti fi ca tion of as cent re charge zones is mainly based on ad vanced geo phys i cal, mod el ling and iso to pic meth -ods (e.g., Burzyñski et al, 2004;Langevin and Guo, 2006;Magri et al, 2009;Zarroca et al, 2011;Gurwin and Krawiec, 2012;Krawiec, 2013). Most works on the topic con cern chiefly iden ti fi ca tion of as cent re charge sys tems, ground wa ter or i gin, and/or dis tri bu tion of el e vated chlo ride con cen tra tions as the most re li able in di ca tor of as cent re charge of ex ploit able aquifers.…”

Section: Introductionmentioning

confidence: 99%

The effects of ascent recharge on deep exploitable aquifers on the North European Plain (a case study of the Rogoźno salt anticline, Poland)

Rasała

Jażdzewska

2017

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1 Adam Mickiewicz Uni ver sity, Fac ulty of Geo graph ical and Geo log i cal Sci ences, In sti tute of Ge ol ogy, De part ment for Hydrogeology and Wa ter Pro tec tion, Krygowskiego 12, 61-680 Poznañ, Po land Rasa³a, M., Ja¿dzewska, J., 2017. The ef fects of as cent re charge on deep ex ploit able aqui fers on the North Eu ro pean Plain (a case study of the RogoŸno salt anticline, Po land). Geo log i cal Quar terly, 61 (4): 962-972, doi: 10.7306/gq.1387In the pa per, we an a lyse the im pact of as cend ing brines from the Me so zoic base ment on the for ma tion of hydrogeological con di tions of deep ex ploit able aqui fers. In the North Eu ro pean Plain, there are nu mer ous salt struc tures with as so ci ated tectonic de for ma tions, which form mi gra tion zones of sa line wa ters from the Me so zoic base ment to the Ce no zoic cover. This cre ates a geogenic threat to ex ploit able aqui fers, es pe cially in terms of ground wa ter ex ploi ta tion con di tions. Pre vi ous studies of these phe nom ena had been con ducted on a re gional scale and fo cused mainly on the dis tri bu tion of chlo rides in receiver aqui fers with out de tailed anal y sis of hydrodynamical and hydrogeochemical ef fects of the as cent. As part of re search into the topic, it is nec es sary at this point to de velop the meth od ol ogy of as sess ment of geogenic risks for ground wa ter, for ex am ple for rea sons of pro tec tion of fresh ground wa ter re sources. As the re search area, a halotectonic anticline re gion was cho sen, where the Me so zoic base ment is char ac ter ized by strong tec tonic de for ma tion, and the deep est Ce no zoic aqui fer has a re gional spread. Some sim ple anal y ses al lowed to clearly iden tify the zones of sa line ground wa ter as cent along tectonic dis con ti nu ities of the Me so zoic bed rock. This phe nom e non causes the ap pear ance of wa ters with a mineralisation up to 2000 mg/L in the ex ploit able aqui fer. As cent re charge through ac tive faults causes the pres ence of zones with an omalously high piezometric pres sure in the cover of the fault over lay. The shape of these zones is cor re lated with the course of tec tonic de for ma tions. In flu ence of geogenic pol lu tion is greater in the mar ginal zones of the anticline than above it. For the full as sess ment of as cent im pact on hydrogeological con di tions of the re ceiver, it is nec es sary not only to an a lyse chlo ride con cen tra tions, but also other ground wa ter com po nents -i.e. sulphates. Hydrogeochemical anal y sis may al low for iden ti fica tion of the shal lower and deeper as cent re charge zones from the Me so zoic base ment. Com pre hen sive iden ti fi ca tion of these fac tors, even in the case of poor tec tonic con trol, can con trib ute to op ti mi za tion of ground wa ter ex ploi ta tion and pro tection con di tions in the ar eas po ten tially and ac tu ally threat ened by as cent.Key words: ground wa ter, as cend ing brines, hy dro dy namic anom a lies, hydrogeochemical anom a lies, salt struc tures, palaeo...

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“…Totally urbanized Hyderabad city covers 90% of the catchment area. The engineering geological province demarcation indicates granite and gneiss country has low permeability, high bearing capacity (1000-2000kg/cm2) /compressive strength and good foundation characteristics, which are favorable for greater urbanization [13,14,15]. The main natural hazard is the depletion of groundwater table due to erratic rainfall heavy runoff (complete urbanization but for few parks, no GW recharge zone) experiences drought situation leading to intense drinking water problem.…”

Section: Soils Drainage Geology and Geomorphologymentioning

confidence: 99%

Impact of urbanization on groundwater in central basin of Hyderabad, Telangana State - India

Kumar¹,

Seeta²,

Rao³

et al. 2015

IJOART

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Urbanization likely to impact ground water quality and quantity leading to higher uncertainty and difficulties in management of pollution. Results yielding a good indication but the scenario demands continuous surveillance of waste water disposal from unauthorized discharges from small scale industries in Balanagar, Jeedimetla and Sanathnagar industrial development areas into the Kukatpally nala. It impacts very much on the Hussainsagar lake water. The groundwater flow model has computed groundwater balance for the entire catchment area of Hussainsagar. Significantly the lake water -groundwater interaction in the Hussainsagar was computed from the groundwater flow model. The upstream and down stream channel from Hussainsagar up to Musi river course have also been simulated with river boundary condition in the flow model.

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MODFLOW/MT3DMS–Based Simulation of Variable‐Density Ground Water Flow and Transport

Cited by 159 publications

References 43 publications

Numerical experiments on interactions between wave motion and variable-density coastal aquifers

Numerical experiments on interactions between wave motion and variable-density coastal aquifers

The effects of ascent recharge on deep exploitable aquifers on the North European Plain (a case study of the Rogoźno salt anticline, Poland)

Impact of urbanization on groundwater in central basin of Hyderabad, Telangana State - India

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