Managed aquifer recharge case study risk assessments

[摘要] This set of case studies of risk assessments at a variety of Australian managed aquifer recharge projects was compiled as a supporting document to the Australian Guidelines for Water Recycling: Managed Aquifer Recharge (NRMMC–EPHC–NHMRC 2009a).The Managed Aquifer Recharge Guidelines were published on the website of Environment Protection and Heritage Council in August 2009 as part of Phase 2 of the Australian Guidelines for Water Recycling (http://www.ephc.gov.au/taxonomy/term/39). The guidelines apply to all source waters including recycled waters, rainwater, treated drinking water, and natural waters.The guidelines are the first risk-based guidelines for managed aquifer recharge. They also take specific account of water quality changes in aquifers, based on scientific evidence. They encourage a prudent staged approach to investment in any project where uncertainties need to be resolved by proponents to establish that human health and the environment are protected.While the guidelines give numerous small examples within the text, during public consultations with the draft guidelines in May-June 2008 it was requested at meetings in various states that some worked case studies be documented showing what is needed for the various stages of risk assessment for projects of different types.This companion document to the Managed Aquifer Recharge Guidelines is intended to do that with the aim of making the guidelines as easy as possible to understand and use by proponents and regulators. It provides ‘model’ risk assessments and descriptions of the investigations to support them, which could be used as conceptual templates for several types of projects. The case studies are assembled in a sequence from simplest to more complicated and generally with non-potable projects at the beginning and potable projects at the end. The latter case studies also invoke other guidelines including Augmentation of Drinking Water Supplies (NRMMC-EPHC–NHMRC 2008) and Stormwater Harvesting and Reuse (NRMMC-EPHC–NHMRC–2009b). At the beginning of the document is a summary of the case studies and the issues they examine.The case studies were all developed before the guidelines, and so the investigations and risk assessments undertaken are reconstituted here to address the requirements of the guidelines in a consistent format. Nevertheless, site development was generally logical and followed the sequence described by the guidelines. These case studies also take account of all relevant National Water Quality Management Strategy guidelines, as would be expected by state jurisdictions.

[发布日期] 2011-03-01 [发布机构] CSIRO

[学科分类] 地球科学(综合)