Salt marshes are coastal wetlands that provide essential ecosystem services, such as wave attenuation, sediment trapping, nutrient buffering, and carbon sequestration. Despite their recognized value, they have undergone extensive decline in recent decades, making their conservation and restoration a global priority. Salt marsh restoration is a common practice to recreate a part of these landforms lost over the last decades because they may have eroded or drowned. However, these areas often have no vegetation, as the low elevation of the deposited sediments exposes the marsh to frequent and longer inundation periods and the absence of a creek network prevents proper soil desaturation. Indeed, creeks play a main role in natural salt marshes to facilitate groundwater drainage when tidal levels lower and marsh platform emerges above the mean sea level. The presence of internal channels is recognized as a crucial factor for the establishment of vegetation. Recent experimental efforts have focused on facilitating the formation of tidal creeks in restored or artificial salt marshes. This study aims to apply a three-dimensional variable-saturated groundwater flow model to simulate and visualize drainage dynamics within a real artificial salt marsh in the Venice Lagoon, providing insights to guide restoration practices, improving salt marsh resilience and mitigating sea level rise impacts.