1.4 Document structure
The following chapters provide the details required to work through each step of the framework, and the structure of the document is outlined in Figure 4. Two general chapters outline the collection of historical (existing) and baseline (current) data, and information required to predict water quality (pH, metals) downstream of a mine on the West Coast and in Southland. Water quality (pH and metal) issues are discussed specific to different mine types in separate chapters relating to the four mine types: coal – potentially acid-forming (PAF), coal –non-acid-forming (NAF), gold – hard rock, and gold – alluvial. For each of these mine types a more detailed discussion of the likely downstream water quality, potential ecological impact, and options for management and treatment to reduce aquatic impacts is provided. A final chapter provides guidance for all monitoring that should be undertaken after mining operations commence. At the conclusion of each chapter, the step-by-step guide is presented, expanding on the detailed information for the relevant steps provided in that chapter. To illustrate application of the Framework, a worked example is provided in Chapter 9, along with a list of service providers.
The main text of this document gives an overview of information required for decision making; the appendices provide more detailed supporting information, including information on the potential impact of extreme events (see Figure 4).
Figure 4 Outline of document structure.
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