GoldSim simulation software allows you to model complex, real-world multi-media environmental systems and assess the risk of those environmental systems. Using Monte Carlo simulation, you can explicitly represent the uncertainty inherent in environmental systems in order to carry out environmental risk assessments, formulate environmental management plans, evaluate potential environmental impacts, and make better environmental planning and resource management decisions. By combining the flexibility of a general-purpose and highly-graphical probabilistic simulation framework with specialized modules to support mass transport modeling, GoldSim has the power and flexibility to build ‘total system” models of any kind of environmental engineering system simulation, ranging from disposal facilities, mines, and hazardous waste sites to watersheds, wetlands or entire ecosystems.