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 13 of 13 for “"solute transport model"”.
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Investigation of a stochastic solute transport model and development of inverse methods in hydrogeology
This thesis encompasses two aspects of stochastic solute transport modelling in porous media. One part is dedicated to investigating a stochastic transport model. In the second part, two types of inverse methods are developed to solve the inverse problem in stochastic contaminant transport …
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Development of a model for simulation of solute transport in a stream aquifer system
A model for simulation of solute transport in a stream-aquifer system is developed. The model is referred to as: Model for Stream-Aquifer Solute Transport or MSAST. The MSAST is developed by coupling four primary models: The groundwater flow model, MODFLOW-96, the coupled groundwater surface water …
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HYPORHEIC FLOW, RESIDENCE TIMES AND NITROGEN REACTIONS IN A RIFFLE-POOL SEQUENCE, TRUCKEE RIVER, NV.
… and pressure to parameterize a flow and solute transport model to examine rates, flow direction, and residence times, 2) monitor the spatial and temporal distribution of dissolved oxygen, inorganic nitrogen (nitrate and ammonium) concentrations, and 3) relate hyporheic flow and residence …
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Economic and environmental trade-offs of irrigation best management practices in the Lower Arkansas River Valley
… question, an economic linear programming (LP) model is written to maximize regional net returns for a representative area within the LARV, using the General Algebraic Modeling System (GAMS). The LP is calibrated to match the physical characteristics of the region, historic water application …
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Shear Dispersion in Double-Porosity Systems
… coefficients through development of mathematical models for solute transport in a variety of coupled double-porosity systems by imposing an accurate boundary condition at the interface between a porous medium and a conduit. Theoretical determination of shear dispersions presented in this thesis …
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Caratterizzazione idrogeologica avanzata dell’acquifero alluvionale della piana costiera di Muravera
… A density dependent groundwater flow and coupled solute transport model was built for the plain taking into account input and output to the hydrogeological system. Three main tasks were developed to implement the model addressing the following questions: i) what is the amount of natural recharge? …
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Methodology for Using a Non-Linear Parameter Estimation Technique for Reactive Multi-Component Solute Transport Modeling in Ground-Water Systems
For a numerical or analytical model to be useful it should be ensured that the model outcome matches the observations or field measurements during calibration. This process has been typically done by manual perturbation of the model input parameters. This research investigates a methodology for …
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The effects of winter cover cropping on nutrient leaching through repacked soil columns
… practice with the potential to decrease nutrient transport from agricultural fields, which consequently reduces nutrient loading to water bodies, eutrophication, hypoxia, and degradation of local ecosystems. This study utilized laboratory-scale soil columns and the one-dimensional water and solute …
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Monsoonal affected dynamics of nitrate and dissolved organic carbon in a mountainous catchment under intensive land-use
… we set up a two-dimensional flow and heat transport model using the numerical code HydroGeoSphere (HGS). Potential effects of river-aquifer exchange dynamics on local water quality were investigated by collecting both, river and groundwater samples. Furthermore, we determined the impact of …
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Flow and transport processes as affected by tillage management under monsoonal conditions in South Korea
… and its impact on flow processes and nitrate transport was investigated. On hillslopes, we monitored surface and subsurface flow processes in four plastic mulched potato fields using a network of tensiometers, FDR sensors, runoff collectors and flow dividers as well as Brilliant Blue FCF …
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Solute Transport Modelling of Latrobe Valley Ash Disposal Sites
… in evaluating the mechanisms which lead to the transport of solutes from ash disposal and develops a methodology to quantify their potential long term impacts on groundwaters beneath a disposal site. The Loy Yang power station is used as a case study. A detailed literature review is presented on …