Supports research on water quality assessment in nationally owned public lands and natural resources, including studies of flood hazards, forest geomorphology, and ground water of campground areas. NPS's Public Use Statistics Program gathers, compiles, and issues public use data for forecasting future demand for services, planning for resource mitigation activities, and initiating marketing strategies. The Social Science Program conducts research on recreation and other visits to units of the National Park System, recreation demand and associated impacts on park resources, diversity of park visitors, non-visitors, employees and local communities, needs of special populations, visitor use management, and visitor satisfaction. NPS also conducts surveys to monitor the condition of key natural resources in parks to inform park managers of changes in resource conditions and the effectiveness of management actions.