Groundwater Modelling Nexus
Groundwater Modelling Nexus

Connecting Solutions, One Project at a Time

Connecting Solutions, One Project at a TimeConnecting Solutions, One Project at a TimeConnecting Solutions, One Project at a Time

Connecting Solutions, One Project at a Time

Connecting Solutions, One Project at a TimeConnecting Solutions, One Project at a TimeConnecting Solutions, One Project at a Time

Our Services

  • Data Analysis: Analysing data to understand groundwater flow patterns, water quality parameters, and contaminant transport mechanisms.


  • Conceptual Model Development: Developing conceptual models of groundwater systems, flow and contaminant migration, based on geological, hydrological, and environmental data .


  • Numerical Model Development: Developing numerical models (e.g., MODFLOW2005, MODFLOW-USG, MODFLOW6) to simulate groundwater flow, pore pressure, inflow to mine, pit lake recovery, pumping rates estimation and water supply, and contaminant transport and particle tracking simulations in the groundwater system.


  • Model Calibration and Validation: Adjusting  groundwater model parameters to align with observed data, ensuring an accurate depiction of real-world conditions and the ability to predict future scenarios using PEST-HP, PEST-IES, PEST-ENSI software and utilities.


  • Predictive Modelling: Using groundwater models to forecast the impacts of various scenarios (e.g., mining, pumping, climate change on quantity and quality of groundwater resources. 


  • Sensitivity and Uncertainty Analysis: Identifying influential parameters and assessing the reliability and confidence levels of model outputs with consideration of input variability and data limitations.


  • Remediation Planning and Design: Testing remediation strategies using groundwater modelling to mitigate contamination and designing appropriate remediation systems.


  • Expert Witness: Providing expert support in legal and regulatory proceedings relating to groundwater issues.


  • Peer Review: Conducting independent reviews of groundwater models to ensure objectivity, rigor, and accuracy.


  • Training and Mentoring: Educating others on groundwater modelling techniques and interpreting modelling results.


  • Integration with other Disciplines: Collaborating with professionals from various fields to provide interdisciplinary solutions to groundwater challenges.


  • Research and Development: Advancing groundwater modelling techniques, addressing emerging issues, and improving groundwater management and protection practices through research and development activities.

Our Team

Arash Mohajeri- Principal Groundwater Modeller/Hydrogeologist

 BSc in Civil-Environmental Engineering, MSc in Geo-Environmental Engineering (Hons), PhD in Computational Geoscience 


Arash is an experienced groundwater modeler and hydrogeologist with 15 years of  professional experience. His expertise encompasses various aspects of groundwater management, including groundwater simulations, water resource assessments, mine closure evaluations, mining environmental approvals, and dewatering assessments. Arash demonstrates strong proficiency in utilising groundwater modelling software such as MODFLOW (flow and transport), Particle Tracking, FEFLOW, PEST, and conducting sensitivity and uncertainty analyses, as well as solute transport modelling. He also possesses scripting skills for model development and analysis. Arash has a proven track record of conducting independent peer reviews, particularly for mine approval and closure models, reflecting his commitment to ensuring model accuracy and reliability.

Contact Us

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Groundwater Modelling Nexus Pty Ltd (ABN: 136 797 908 39)  (ACN: 679 790 839) 


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