SEEP/W is a software program used for analyzing groundwater flow and contaminant transport in soil and rock. It helps engineers and scientists model how water moves through different materials, which is essential for designing effective drainage systems, assessing environmental impacts, and managing water resources. The program is particularly useful in fields like civil engineering, environmental engineering, and hydrogeology. By simulating various scenarios, SEEP/W allows users to predict how changes in land use or climate can affect groundwater levels and quality, aiding in better decision-making for sustainable development and environmental protection.