MOD-REACH has been developed for the prediction of GW quality and piezometric levels and it is the core of the REACH-Tool

MOD-REACH module of the REACH Tool is made up two components: MODFLOW engine for groundwater flow simulation and the SEAWAT module for solute transport modeling.

The MODFLOW component simulates aquifer hydraulics and groundwater quantity. In our project, it establishes a correlation between hydrologic stresses (e.g., pumping, recharge) and quantitative state variables (piezometric levels). The main objective of this analysis is to forecast the aquifer's quantitative response and identify areas at risk of overexploitation or depletion.

This analysis can contribute to the identification of groundwater areas more vulnerable to quantitative impacts, which are, in consequence, prime candidates to implement Managed Aquifer Recharge (MAR) systems.

The SEAWAT component is a predictive model that uses coupled flow and transport techniques to analyze contaminant movement and density-dependent flow. In our project, this model has been developed for the prediction of saltwater intrusion dynamics and contaminant plume evolution in critical aquifers.

The use of physics-based numerical techniques programmed in a modular framework gives these models a high potential for replication and transferability in other geographical, climate, and hydrogeological contexts. These techniques have been applied to variables such as piezometric levels and contaminant concentrations, which need to be considered to establish specific and optimized groundwater management regimes. MAR performance depends on current but also future 'hydrogeological boundary' conditions.