Application of Space Technology to Identifying Suitable Areas of Solid Waste Disposal in and Around Lae City, Papua New Guinea [ ]

Identification of suitable areas of solid waste disposal is crucial in solid waste management especially in large cities where municipal au-thorities of the city has to deal with the situation as a least trade-off to city’s environment. While increasing population in cities or urban areas is the order of the day in commensurate with the proliferation of industries, commercial activities, public institutions and real estate enterprises; unprecedented pace of waste production is obvious. In order to cope with the situation it is paramount to find suitable landfill area to save the city’s environment. This research study was carried out with a view to identifying suitable areas of solid waste disposal in Lae city utilising GIS and Remote sensing technology. With the multi-criteria evaluation process, the maps were prepared through overlay and suitability analysis. The city is densely populated with ever increasing industries and commercial activities, so the solid waste handling remains a serious challenge for the civic authority. In order to select suitable site of solid waste disposal, the area must be easily accessible from any corner of the city and at the same time the site must not pose health hazard to nearby residents, hence six factors were selected and analysed. These are slope, Land use Land cover (LULC), buffer zones from major road, public institution, ‘settlements and housing’ and main rivers. From the overlay analysis the final suitability map was produced and reclassed as unsuitable, moderately suitable and highly suitable areas. It was found out that 11.37% of Lae city area and surrounding are highly suitable for solid waste disposal. The largest highly suitable site found was in the north-east part of the city.