Contaminant transport in fractured porous medium domains refers to the study of how pollutants move through geological formations that consist of both a porous matrix, such as soils and sediments, and fractures, like cracks and fissures in rock. These environments are complex since the fractures often provide pathways for rapid movement of contaminants, while the porous matrix can store and slowly release pollutants over time. Understanding this transport is crucial for managing groundwater quality, predicting the spread of contamination, and designing remediation strategies.