The motivation of this study is to provide and solve a decision model for land use planning for an existing regional situation. The chosen framework views the task of floodplain management as a constrained optimization problem capable of solution by standard mathematical programming techniques. The framework is sufficiently flexible to permit incorporation of, in addition to floodplain zoning, such non-structural flood control measures as flood proofing, insurance, and flood warning systems. Further, the framework can be modeled so as to include political restraints and a broad range of socially desirable goals. In a larger regional context, the framework permits the internalization of the value of the externality commonly associated with development of floodplain lands.