Understanding the hydrogeology of a bauxite residue disposal area

摘要

The hydrogeological study of BRDA1 has yielded valuable insight into the short and long-term behaviour of groundwater flow in the BRDAs at the refinery.The most important conclusions that were drawn from this study are:Only a small proportion of incident rainfall on the surface of BRDA1 infiltrates and eventually leaves the BRDA by basal drainageThe development of the conceptual hydrogeological model was important, because it enabled the development of a mathematical model which incorporated best estimates of storage and hydraulic conductivityThe development of a mathematical model of the system has been useful in quantifying some predictions that relate to on-going requirement for post closure liquor collection and treatment.