Int. J. Environment and Waste Management, Vol. 20, No. 2, 2017 171 Copyright © 2017 Inderscience Enterprises Ltd. Seasonal variations in moisture content and the distribution of total organic carbon in landfill composites: case of active and closed landfills in Lagos, Nigeria Abdulganiyu Omobolaji Adelopo Department of Works and Physical Planning, University of Lagos, Lagos, Nigeria Email: aadelopo@unilag.edu.ng Babajide Alo Department of Chemistry, University of Lagos, Lagos, Nigeria Email: balo@unilag.edu.ng Parvez I. Haris Faculty of Health and Life Sciences, De Montfort University, The Gateway, Leicester LE1 9BH, UK Email: pharis@dmu.ac.uk Katherine Huddersman Faculty of Health and Life Sciences, De Montfort University, The Gateway, Leicester LE1 9BH, UK Email: huddzeo1@dmu.ac.uk Richard O. Jenkins* Faculty of Health and Life Sciences, De Montfort University, The Gateway, Leicester LE1 9BH, UK Email: roj@dmu.ac.uk *Corresponding author Abstract: The compositional trend and characteristics of active and closed landfill composites with depth was evaluated, in order to establish possible relationships between seasonal variations in moisture content, distribution of total organic carbon (TOC) and pH stability. A bulk system of composite