Author(s): Ranjan Sarukkalige; Cameron Burns
Linked Author(s):
Keywords: Stormwater; Managed aquifer recharge; Water quality; Baseflow
Abstract: Most of the areas in Western Australia have experienced reduced rainfall and predictions for future rainfall also show significant reduction of water resources in the future. As demand increases, Western Australian water supplies are in greater pressure and alternative urban water sources must be investigated. Managed Aquifer Recharge of treated stormwater to the groundwater aquifer and use them for irrigation purposes were selected as an alternative resource. The main aim of this study was to investigate the feasibility of stormwater as a main source for managed aquifer recharge and use the recharged aquifers as a source of irrigation water for public open spaces within the City of Canning, Western Australia. As part of the feasibility study, assessment of stormwater quality at suitable drain outlets was undertaken based on water quality guidelines and existing groundwater quality. Flow rate levels in the drain outlets were also measures to determine flow patterns and magnitudes generated, as well as the magnitude of baseflow contributions. The most suitable drains and locations for using stormwater to recharge groundwater was identified based on optimum water quality and flow rate analysis. This study also recognized potential best management practices to improve stormwater quality and their associated catchment and temporary storage capabilities in relation to site conditions. Recommendations based on the findings of the study were generated to assist decision makers to propose sustainable ways to implement managed aquifer recharge in the City of Canning area.
Year: 2016