Characterization and spatial distribution of heavy metals in sediment from Cedar and Ortega rivers subbasin

摘要: The Cedar and Ortega rivers subbasin is a complex environment where both natural anthropogenic processes influence the characteristics distributions of sediments contaminants, which in turn importance for maintenance, dredging pollution control. This study investigated spatial distribution heavy metals, including lead (Pb), copper (Cu), zinc (Zn) cadmium (Cd), from using field measurements three-dimensional kriging estimates. Sediment samples collected three sampling depth intervals (i.e., 0-0.10, 0.11-0.56 0.57-1.88 m) 58 locations showed that concentrations Pb ranged 4.47 to 420.00 mg/kg dry weight, Cu 2.30 107.00 Zn 9.75 2,050.00 weight Cd 0.07 3.83 weight. Kriging estimates Pb, decreased significantly sediment 0.10 1.5 m, whereas were still enriched at m. It further revealed River area was potential source since it more contaminated than rest subbasin. Comparison aluminum (Al)-normalized metal indicated most metals within top two (0-0.56 had exceeding background levels by factors 2-10. A view contamination plumes all with threshold effect level (TEL) could pose threat health aquatic organisms, primarily located above