In recent years, systems for processing environmental information have been evolving from research and development systems to practical applications. Today, many of these systems already support environmental activities at the industrial, governmental, and worldwide levels. A broad range of applications in environmental protection is covered by these systems, including monitoring and control, conventional information management, computation and analysis, as well as planning and decision support. A new discipline, known as Environmental Informatics, is emerging which combines research fields such as data base systems, geographic information systems, modeling and simulation, computer graphics, user interfaces, neural networks, knowledge processing, and systems integration. Keyword Codes: H.0; I.0, J.2