Oceana Gold New Zeland Limited Hydrogeology Support for WKP Underground Updated Conceptual Model 4. As stated by Haitjema,1995: A conceptual - world groundwater problem such that (1) it captures the essential features of the real-world problem and (2) it can be described mathematically. Essential features can be properly identified and described whenever the quality of data available and the amount of information leads to a good comprehension of the underground environment. The main intent of the conceptual model is to describe the characteristics and hydraulic properties of the EG and T stream vein systems, and their potential relationships to the shallower groundwater system, so that assessments of the effects of mining on shallow groundwater and surface water can be advanced. The conceptual model is not intended to be comprehensive, i.e. it does not describe all site wide hydraulic and hydrogeologic processes. The distribution of permeability within an area of approximately 2 Km2 (approximate area of EG Vein and T-Stream Vein systems) and elevations raging from 300m to -300m is complex to be described in detail when the information is limited to a small number of bores. Due to the limited data set available for the conceptualization process, the conceptualization update is presented in sections, starting with shallow groundwater, and followed by cross-sections representing the EG and T-stream vein systems. Review by sections and by veins allows us to evaluate local patterns and parameter distributions that may lead to a better understanding of the geological framework, and therefore a better comprehension of the hydrogeology. 4.1. As described in Section 2.2, there are two piezometer pairs that are used to monitoring water levels in the shallow aquifer in the vicinity of the EG vein, WKP-01 (S/D) and WKP-02 (S/D). Piezometer locations and a section line for a schematic cross section are shown in Figure 4-1. Figure 4-1 Shallow piezometer locations
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