水利专业英语翻译.pdfVIP

5. Discussion 讨论 This paper has analysed local-scale short-term spatio-temporal variations in groundwater composition in a wetland environment in The Netherlands. In general largest variations in groundwater quality parameters, both spatially and temporally, occur for nutrients (NO-, PO3-, NH4, K) and redox related metals (Fe, Mn). Macroions (Na-Cl, Ca-Mg-HCO3 and SiO2) show intermediate to low variations. Spatial and temporal RSD show good correlation, with spatial RSD-s being approximately three times larger than temporal RSD-t in the study area. This may partly be caused by the fact that in the determination of these indices spatial and temporal dimensions are interlinked to a certain degree, as spatial RSD is calculated as the median over the separate spatial RSD values per sampling campaign (i.e. time), and temporal RSD is calculated as the median over the separate temporal RSD values per filter screen (i.e. space). 本文分析了荷兰的湿地环境中地下水组成成分在局地尺度下短期内时空变化。 通常来 说，地下水水质参数中时间和空间变化最大的是营养元素（硝酸根、磷酸根、铵根和钾元素） 和氧化还原相关金属（铁、锰）。 高分子离子（氯化钠、碳酸氢钙镁和二氧化硅）则表现出 中等或者较小的变化。空间和时间的相对标准差有良好的相关性，在研究区域空间相对标准 差RSD-S 大约为时间相对标准差RSD-T 的三倍。这其中可能有部分原因是因为这些指标的 测定时在空间和时间方面有一定程度的相关联，例如，空间的标准偏差值就是采用每一次采 样活动（即时间）的各个空间标准偏差值的中位数进行计算，而时间标准偏差值则是采用每 一个过滤网（即空间）的各个时间标准偏差值的中位数进行计算。 A spatial zonation has been found with most parameters showing significant differences in median concentrations in a horizontal direction between the eastern Sand/Dry area and the western 是/ Wet area. This zonation confirms the findings in literature that soil type and wetness have significant influences on groundwater com-position in the study area (e.g. Schot and Van der Wal, 1992; Schot and Wassen, 1993). However, a relation with depth as described in literature has not been found in this study. Possibly this is due to the rather shallow location of the