The River Basin Model is not primarily a water management model. It is a human interaction, computer-simulation decision-making tool, representing the entire complex economic, social, and governmental activities occurring within a specified local system. Its users represent the major economic, social, and governmental decision-makers who cause the regional system to function on a year-to-year basis. The manual contains the basic information and description of the model required by the Economic Sector. Economic teams are given the opportunity and responsibility for operating and creating any growth in the economic resources of the local system. Players in this sector have the chance to use this opportunity in such a way as to satisfy self-established goals and/or to respond to pressures brought on it by government officials, the local citizenry, and the rest of the business community.