Reactive transport modeling is a computational approach used to simulate the movement and transformation of chemicals in various environmental systems, such as groundwater, soil, and sediment. This modeling technique takes into account the physical and chemical interactions between different substances and their surroundings, such as reactions, mass transfer, and diffusion processes. By incorporating complex reactions and transport mechanisms, reactive transport modeling can help researchers understand and predict the behavior of contaminants, nutrients, and other substances in natural or engineered systems. This information is crucial for making informed decisions in areas such as water quality management, environmental remediation, and pollution control.