Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"RT3D"”.
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Modeling biotic and abiotic decay of trichloroethylene (TCE) using the Reactive Multi-Species Transport in 3-Dimensional Groundwater Aquifers (RT3D) code
… Transport in 3-Dimensional Groundwater Aquifers (RT3D) code. RT3D is part of the MODFLOW family of codes that is commonly used in engineering practice. In addition, this thesis explores the mitigation of the effects of back diffusion by implementing these decay processes in a 2-Dimensional flow …
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Parallel Processing of Reactive Transport Models Using OpenMP
… 1D theoretical problem. The second is RT3D, a modular computer code for simulating reactive multi-species transport in 3-dimensional groundwater systems written and developed by Dr. T. Prabhakar Clement. RT3D is a sub-component of a parent code, MT3DMS, which utilizes RT3D to solve …
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Modeling nonpoint-source uranium pollution in an irrigated stream-aquifer system: calibration and simulation
… of groundwater and stream flow dynamics, and an RT3D package, which addresses the reactive transport of U, Se, and nitrogen (N) species in both groundwater and interconnected streams. RT3D relies on the simulated flows generated by MODFLOW to track the movement of U, Se, and N species between …
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Assessing the salinity effects and economic feasibility of on-farm desalination technology in irrigated semi-arid regions
… A subsurface salt transport model (MODFLOW-RT3D) is applied to a 50,600-ha (125,000 acres) region in southeastern Colorado located within the Arkansas River Valley. The model simulates the reactive transport in soils and groundwater of 8 major salt ions (Ca+, Mg2+, Na+, K, SO42-, CO32-, …
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Modelling of nitrogen transport and turnover during soil and groundwater passage in a small lowland catchment of Northern Germany
… MODFLOW und das Stofftransportmodell RT3D. Zur Untersuchung der Wechselwirkungen mit den Gebietseigenschaften muss die Verteilung und Verfügbarkeit von Reaktionspartnern berücksichtigt werden. Dazu wurde ein Reaktionsmodul entwickelt, welches chemische Prozesse im Grundwasser …
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Barriere reattive permeabili a ferro zerovalente: modellazione dei fenomeni di trasporto e degradazione multicomponente
… ed NETFIT1D-N ed il software tridimensionale RT3D, opportunamente modificato per la simulazione delle reazioni di degradazione multicomponente che avvengono all’interno delle PRB. Le simulazioni hanno permesso di prevedere l’andamento spaziale e temporale delle concentrazione dei solventi …
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Investigating best management practices to reduce selenium and nitrate contamination in a regional scale irrigated agricultural groundwater system: Lower Arkansas River Valley, southeastern Colorado
… using 18 scenarios. The UZF-MODFLOW and UZF-RT3D numerical models, calibrated against extensive sets of field data in the region, were used to simulate groundwater flow and the physical and chemical processes governing the fate and transport of Se and N species. Specific BMPs include …
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COMBINING GEOCHEMICAL AND NUMERICAL MODELING FOR CHLORINATED SOLVENTS GROUNDWATER CONTAMINATION
Chloroethenes represent a serious risk to aquatic ecosystems and human health on a worldwide scale. Chloroethenes contamination is difficult to solve due to the different optimal redox conditions needed to obtain efficient degradation of each chloroethene. The more chlorinated ones such as …