外文翻譯---了解礦區(qū)水和鹽的動態(tài)支持集成水質(zhì)和質(zhì)量管理-其他專業(yè)(文件)
【正文】 bjectives. This paper will present data that illustrate the responses of representative water bodies on the sites to changing climatic conditions. Previous modelling of water and salt fluxes has assumed that salts behave conservatively, ie that salt concentration of a water body will only change in direct proportion to the mixing of input waters with different salt concentrations (eg Moran et al, 2021). While this is a generally acceptable assumption for predicting total salt concentrations and the overall implications of water management strategies, many individual ions prising the salt load may participate in biogeochemical reactions which may dramatically alter the ion position of a water body. This altered ion position may have impacts on particular processes. For example, it is known that divalent cations (Mg and Ca) provide greater flotation benefits during coal washing than monovalent cations (Ofori et al, 2021). Thus it is important to not only understand the dynamics of total salts on a site but also the principal processes governing the concentrations of individual ions prising the salts. One of the difficulties in understanding the dynamics of water and salts on mine sites is that it is difficult to distinguish between water from different sources and therefore accurately attribute salt fluxes. Inputs from a number of water sources, eg groundwater, runoff, etc cannot be metered. In this work stable isotopes Oxygen 18 (denoted d18O) and Deuterium (denoted dD) have been used in conjunction with geochemical signatures to trace inputs from these unmetered water sources 6 Times series of cation (top) and anion (bottom) concentration changes determined in surface waters of PitF. Average (z1 sd). Deep water concentrations are shown for parison 7 Cation (top) and Anion (bottom) position of runoff from spoil and road Runoff position Although runoff from spoil is not a large input to Pit F due to the small catchment area, the contribution via this process appears to impact the surface water ion position as discussed below. This process may have a more pronounced impact on the water quality of water stores with larger catchment areas or areas with highly active spoil. Changes to rainfall position during runoff from spoil and roads is shown in Figure 7 and total concentrations as a proportion of total ions in Figure 8. Rainfall position is taken from Brasell and Gilmour (1980) and Probert (1976). Based on the method of collection and similarity between the d18O and Dd position of the runoff samples and rainfall (Figure 9), the runoff samples collected in this study are likely to mostly reflect position of surface or fast flow path runoff rather than runoff from rainfall that has infiltrated the spoil before flowing to the pit. Fast flow path runoff may also include infiltration through cracks or fractures in the spoil. Thus the ion position of these samples may differ significantly from the total runoff (surfacezinfiltration) entering the pit during events due to the shorter contact time of the rainwater with spoil. Ongoing work is being conducted to elucidate the relative importance of surface and deeper flow paths through spoil and consequent ion inputs delivered to the pits under different conditions. What is apparent from Figures 7 and 8 is that there is considerable variability in both the amount of salts delivered via runoff and the relative proportion of ions in solution. Comparison of the ratio of Ca, Mg relati
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