OPTIMAL LAND ALLOCATION FOR SOLID-WASTE AND HAZARDOUS-WASTE LANDFILL SITING

A multiobjective optimization model is presented to determine the effi cient aggregation of land parcels for use as a solid- or hazardous-was te landfill. In this work, a new constraint for measuring compactness and contiguity of the selected subregion is introduced. This constrain t measures compactness and contiguity as a function of the subregion's outside perimeter and area. The model optimally selects and sizes the landfill site from multiple bundles of available discrete and irregul arly shaped land parcels. Each bundle consists of several individual a nd irregular land parcels and is disjoint from all other bundles. The model is multiobjective in nature, addressing land purchase cost, comp actness, and contiguity considerations. The quantity of land required is determined by a projection of the flow of waste from the communitie s, commercial areas, and industries the landfill serves. To illustrate the model, a case study is presented using the landfill-site search p rocess in Orange Count, North Carolina.