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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1111/gwat.12318
|2 doi
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|a pubmed24n0819.xml
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|a (NLM)25628017
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|a DE-627
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|e rakwb
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|a eng
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|a Wu, Ming Zhi
|e verfasserin
|4 aut
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|a PHT3D-UZF
|b A Reactive Transport Model for Variably-Saturated Porous Media
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 06.10.2016
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|a Date Revised 16.11.2017
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2015, National Ground Water Association.
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|a A modified version of the MODFLOW/MT3DMS-based reactive transport model PHT3D was developed to extend current reactive transport capabilities to the variably-saturated component of the subsurface system and incorporate diffusive reactive transport of gaseous species. Referred to as PHT3D-UZF, this code incorporates flux terms calculated by MODFLOW's unsaturated-zone flow (UZF1) package. A volume-averaged approach similar to the method used in UZF-MT3DMS was adopted. The PHREEQC-based computation of chemical processes within PHT3D-UZF in combination with the analytical solution method of UZF1 allows for comprehensive reactive transport investigations (i.e., biogeochemical transformations) that jointly involve saturated and unsaturated zone processes. Intended for regional-scale applications, UZF1 simulates downward-only flux within the unsaturated zone. The model was tested by comparing simulation results with those of existing numerical models. The comparison was performed for several benchmark problems that cover a range of important hydrological and reactive transport processes. A 2D simulation scenario was defined to illustrate the geochemical evolution following dewatering in a sandy acid sulfate soil environment. Other potential applications include the simulation of biogeochemical processes in variably-saturated systems that track the transport and fate of agricultural pollutants, nutrients, natural and xenobiotic organic compounds and micropollutants such as pharmaceuticals, as well as the evolution of isotope patterns
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Gases
|2 NLM
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|a Soil
|2 NLM
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|a Water Pollutants, Chemical
|2 NLM
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|a Post, Vincent E A
|e verfasserin
|4 aut
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|a Salmon, S Ursula
|e verfasserin
|4 aut
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|a Morway, Eric D
|e verfasserin
|4 aut
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|a Prommer, Henning
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Ground water
|d 1979
|g 54(2016), 1 vom: 28. Jan., Seite 23-34
|w (DE-627)NLM098182528
|x 1745-6584
|7 nnns
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| 773 |
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|g volume:54
|g year:2016
|g number:1
|g day:28
|g month:01
|g pages:23-34
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|u http://dx.doi.org/10.1111/gwat.12318
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