Consulting

Advanced Service Areas:

Please contact AGT for information and click on the links below to learn more.

• Numerical Solutions to ...

• Design of Remediation Systems

• Advanced Numerical Analysis of Groundwater, Parameter Estimation Technique

• Application of MT3DMS program

• Application of RT3D 2.5 (3D simulation of biodegradation and different reactions)

• Application of MODFLOW SURFACT 3D enchased version of Modflow

• Application of HELP

• Application of VS2DI and some other unsaturated flow and contaminant models

We Develop Numerical Solutions to...

- Calculate Sustainable Water Supply Yields

- Manage Stream Flow Reduction

- Simulate Aquifer – Stream Interactions

- Design Aquifer Storage and Recovery (ASR) Systems

- Manage Underground Storage of Recoverable Water (MUS)

- Delineate Well Head Protection Areas (WHPAs) (Capture Zones)

- Evaluate Planned Increases in Well Field Capacity

- Calculate Well Interference and Design Mitigation Approaches

- Design Water Supply Well Fields

- Simulate Dam Seepage and Design Mitigation Approaches

- Assess Slope Drainage

- Design of Open Pit Mine Dewatering Program

- Construction Dewatering Design

- Predict Groundwater Travel Times

- Assess Transport of Point and Non-point Contaminant Sources

- Stochastic Simulations/Monte Carlo

- Perform Environmental Impact Studies (EIS)

- Predict Natural Attenuation

- Predict Contaminant Transport

- Simulate and Design Artificial Recharge Programs

- Design Radial Collector Well

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Design of Remediation Systems

- Pump-and-treat to Capture and Treat the Contaminated Groundwater Plume and LNAPL and DNAPL Source Zone, rate limited sorption/desorption, tiling effect, rebound

- Trench-and-Drain to Intercept and Treat the Contaminated Groundwater Plume

- Funnel-and-gate to Intercept and Treat the Contaminated Groundwater Plume

- French Drain Design

- Bioremediation System Design

- LNAPL/DNAPL Dissolution

- Air Sparging (introduction of O2 in aquifer)

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This picture was produced with Visual Modflow (Schlumberger Water Services)

Advanced Numerical Analysis of Groundwater, Parameter Estimation Technique

Parameter estimation technique gives valuable insight into the strengths and weaknesses of groundwater data set and conceptual model of hydrogeological system. This analysis enabled an engineer to judge the degree of uncertainty associated with model predictions, and to make decisions regarding the appropriate levels of model complexity. Application of these techniques has great practical value in solving different problems in groundwater engineering. Examples are available on request.

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Application of MT3DMS program

MT3DMS can be used to simulate 3D changes in concentrations of miscible contaminants in groundwater, both organic and inorganic, considering advection, diffusion, dispersion, adsorption and some chemical reactions, with various types of boundary conditions and external sources or sinks. The chemical reactions included in the model are equilibrium-controlled or rate-limited linear or non-linear sorption, and first-order irreversible or reversible kinetic reactions.

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Application of RT3D 2.5 (3D simulation of biodegradation and different reactions)

- 3D Multi-species transport and coupled reactions

- Fixed (sorbed) and mobile species

- 3D BTEX (or any other biodegradable contaminant) Degradation via Aerobic Pathway (Instantaneous reaction kinetics similar to BIOPLUME II)

- 3D BTEX Degradation via Sequential Electron Acceptor Pathways (Instantaneous reaction kinetics)

- 3D BTEX Degradation via Sequential Electron Acceptor Pathways (First-order kinetics)

- 3D Double Monod Model with Bacterial Transport Kinetics (e.g. Transport of BTEX and oxygen mediated by bacteria)

- 3D Mass-transfer Limited Sorption model

- 3D Sequential Degradation of PCE/TCE/DCE/VC via Reductive Dechlorination (First-order kinetics)

- 3D Sequential Degradation of PCE/TCE/DCE/VC via both Anaerobic and Aerobic Pathways

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Application of MODFLOW SURFACT 3D enchased version of Modflow

- 3D Unsaturated zone modeling (modeling of flow, transport, artificial recharge....)

- 3D Vapor Flow

- Includes fractured flow and dual porosity

- Includes 3D solute transport, multiphase transport, NAPL dissolution and volatilization

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Application of HELP

HELP is the most advanced hydrological modeling environment available for designing landfills, predicting leach ate mounding and evaluating potential leach ate seepage to the groundwater table. Currently used by the US EPA, Bureau of Land Management, US Nuclear Regulatory Commission, Finnish Environmental Institute, Korea Electric Power Corporation, Sri Lanka - National Water Supply & Drainage Board, Geological Survey of Malaysia, Food & Agriculture Organization of the UN, Geological Survey of Slovenia, etc.).

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Application of VS2DI and some other unsaturated flow and contaminant models

A software package for simulating fluid flow and solute or energy transport in variably saturated porous. Typical applications of the programs are for studies of ground-water recharge, surface-water-ground-water exchange, and contaminant transport from waste disposal sites. Heat movement can be simulated as a tool for studying the movement of ground water near streams.

Different LNAPL simulators that simulate hydrocarbon recovery from source zone, dissolution and plume longevity. Also it evaluates LNAPL impact on groundwater under range of conditions.

Application of multiphase models (LNAPL/DNAPL, water, air) and models that simulate see water intrusion need some time to be implemented.

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