Univ Lille Nord de France, 59000, Lille, France.
Environ Sci Technol. 2010 Jan 15;44(2):593-9. doi: 10.1021/es9022305.
Rivers flowing through urbanized and industrial areas are usually greatly damaged by anthropogenic activities discharging contaminants. Characterizing the spatial distribution of pollutants in sediments is of high importance for selecting a suitable remediation operation, but is a complex task because this spatial variability is the result of various physical and chemical mechanisms occurring at different scales. Factorial Kriging Analysis (FKA) was applied on data collected in a canalized river (Scarpe, France) for that purpose, because this geostatistical technique allows to decompose a given variable into components of different spatial correlations and map them separately. This decomposition is meaningful provided that it can be related to physical phenomena occurring at the identified spatial scales. FKA applied to Cd and Zn concentrations in sediments of the Scarpe river proved to be effective, allowing their mapping to be decomposed in a first map related to a short-range spatial correlation corresponding to hot spots interpreted as the impact of industrial and urban inputs located along the canal, and a second map related to a long-range spatial variability associated with long pollutant plumes interpreted as the effect of one major upstream pollutant input.
流经城市化和工业化地区的河流通常会受到排放污染物的人为活动的严重破坏。描述沉积物中污染物的空间分布对于选择合适的修复作业非常重要，但这是一项复杂的任务，因为这种空间变异性是在不同尺度上发生的各种物理和化学机制的结果。为此，在法国斯卡普运河采集的数据上应用了因子克里金分析（FKA），因为这种地质统计技术允许将给定变量分解为不同空间相关性的分量，并分别对它们进行映射。这种分解是有意义的，前提是它可以与在确定的空间尺度上发生的物理现象相关联。应用于斯卡普河沉积物中 Cd 和 Zn 浓度的 FKA 被证明是有效的，允许将它们的映射分解为与短程空间相关性相关的第一张地图，该地图与沿运河分布的工业和城市输入的热点解释相对应，以及与长程空间变异性相关的第二张地图，该地图与解释为主要上游污染物输入影响的长污染物羽流相关联。
