Risk assessment and rehabilitation potential of a millennium city dumpsite in Sub-Saharan Africa

Abstract

Management of the ever-increasing generated solid waste had been a difficulty for state governments in Nigeria. The high costs connected to this waste management which had encumbered the state budget, ignorance or lack of understanding of resourceful waste management and insensitivity to environmental concerns may have led to partial neglect of this sector. This research paper is aimed at evaluating the rehabilitation potential and the risk level of Igbatoro dumpsite, an Ondo state-managed waste dumpsite which predominantly receives the waste of Akure and its environs. In determining rehabilitation/reconstruction potentials and assessing the risk of the dumpsite, an Integrated Risk Based Approach (IRBA) was considered. The Risk Index (RI) was calculated from the addition of the sensitivity index output with the attribute weightage of the twenty-seven (27) parameters studied. A total risk index of 571.58 was obtained for Igbatoro dumpsite indicating moderate hazard evaluation. Questionnaires distributed to dwellers around the dumpsite also showed that 83.6% of those interviewed agreed that the present management of the dumpsite is poor while 81.8% supported rehabilitation of the dumpsite. Hence, reconstruction of the Igbatoro dumpsite to an endurable and controlled landfill is hereby recommended.

An analyses of the status of landfill classification systems in developing countries: Sub Saharan Africa landfill experiences

“…landfills designed to permit the rapid dispersion of leachate into the surrounding environment) and the resulting contamination of soil and groundwater are common occurrences in operating landfills. In the last two decades, practices at landfill sites have been overwhelmingly investigated, evaluated and reported, suggesting the need for reform and corrective interventions (Adekola and Eletta, 2007;Agbenyeku et al, 2016;Aleluia and Ferrão, 2016;Ayolabi and Oyelayo, 2005;Chakraborty et al, 2018;Efe, 2005;ElSaid and Aghezzaf, 2018;Ferronato et al, 2016;Ferronato et al, 2017;Guerrero et al, 2013;Imam et al, 2008;Iwegbue et al, 2006;Kamaruddin et al, 2017;Masocha, 2006;Mmereki, 2018;Nansubuga et al, 2016;Ojuri et al, 2018;Toyin, 2009;Ukpebor et al, 2003). Fig.…”

A GIS–AHP-based approach in siting MSW landfills in Lokoja, Nigeria

“…A pertinent issue which is related to environmental management via proper supervision and control of solid waste, pollution and health risks which arise in open dumping sites that are often commonly used for waste disposal is termed solid waste management (SWM) [1][2][3][4]. The menace of environmental pollution ensuing from indiscriminate waste disposal through open and poor waste disposal techniques has been a threat to the inhabitants of most developing countries [5][6][7], and its harmful effects on the (soil and water) environment and human health are considered to be frightening [8][9][10][11]. Throughout history, the commonest technique of organized waste disposal has been landfills and it has remained so in several places worldwide.…”

An Analysis of the Risk Posed by Leachate from Dumpsites in Developing Countries

“…Open dumpsites are common in developing countries [1][2][3][4][5][6][7]. Wastes disposed of in dumpsites can pose several public and environmental health risks including groundwater pollution [8,9], heavy metals contamination in the soil [10], as well as the production of greenhouse gas emissions [6,11] and volatile organic compounds (VOCs) [12].…”

“…Effectively managing the waste and the potential risks posed in a developing world context is often challenging [18]. For example, there is often limitation in access to effective policies, enforcement, finance and suitable skills and competencies [7,19,20]. An understanding of how best to quantify the risks associated with the waste is therefore important as a means of determining how best to manage these risks.…”