Impact of grass cover on the magnetic susceptibility measurements for assessing metal contamination in urban topsoil.

摘要: In recent decades, magnetic susceptibility monitoring has developed as a useful technique in environmental pollution studies, particularly metal contamination of soil. This study provides the first ever examination effects grass cover on (MS) measurements underlying urban soils. Magnetic were taken situ to determine κ (volume susceptibility) when layer was present (κgrass) and after trimmed down root (κno grass). Height recorded at each grid point. Soil samples (n=185) collected mass specific (χ) performed laboratory frequency dependence (χfd%) calculated. Metal concentrations (Pb, Cu, Zn Fe) soil determined gradiometry survey carried out section area. Significant correlations found between MS content p<0.01 level. Spatial distribution maps created using Inverse Distance Weighting (IDW) Local Indicators Association (LISA) identify common patterns. κgrass (ranged from 1.67 301.00×10-5 SI) κno 2.08 530.67×10-5 measured are highly correlated [r=0.966, n=194, p<0.01]. The volume datasets presence absence coverage share similar spatial pattern. re-evaluates techniques results suggest that removal prior obtaining is unnecessary. does not impede sensor accurately measuring elevated soils, therefore with can be reliably used areas contamination.