GIS Modelling of Land Suitability for Solid Waste Disposal

要旨

The increase in population in India and other developing countries has made the task of urban planning and management difficult, which in turn makes solid waste management more complex. Municipal solid waste generated in India is disposed mostly in open dumps, which form a menace to the ambient environment. There are no sanitary landfills in operation in Chennai Metropolitan Development Area, but solid wastes from Chennai city are dumped at Perungudi and Kodungaiyur located on the South and North of the City respectively. Identification of landfill sites for solid waste disposal becomes a critical management issue and therefore the selection should be based on a number of considerations. The ultimate purpose of most GIS projects is to combine spatial data from diverse sources, in order to describe and analyse interactions, to make prediction with models and to provide support for decision-makers. Fuzzy logic can be applied to overlay operations in GIS, when combining values for the same location or cell from several layers, a fuzzy AND operation takes the minimum of all fuzzy values for that location. Conversely, the fuzzy OR operation takes the maximum of the fuzzy values for particular location. The main objective of this study is to identify sites for solid waste disposal based on different overlay operations of various maps and their classes prepared.