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Floods are phenomena that become more frequent and more intense due to anthropogenic activities such as poor land use, improper waste management, uncontrolled urbanization, industrialization ... In developing countries, the drainage systems are most often limited (if not absent), inadequate or not adapted. Most of the storm drains are regularly filled with solid materials that are collected from the environment and conveyed by runoff. Waste management in developing countries is very poor and important fractions of the wastes produced are abandoned in nature thereby impacting severely on the environment. The Abiergué watershed was targeted to study the process of the hydrological transformation of rainfall into runoff that conveys solid waste within a drainage system. The aim of this research was to develop a model that will enable the simulation of waste flow with respect to a specific rainfall pattern. It will permit to quantify the total solid wastes in circulation in a drainage system and as such provide appropriate and significant information on the role played by these wastes which can be used for engineering new adapted systems in developing countries. It was found that the solid domestic wastes and soil sediments evolved following a linear and a quadratic pattern respectively with respect to runoffs.

Regional Scale Modelling of Solid Waste Flow in Storm Drains of Urban Cities: The Case Study of the Abiergué Watershed