The Risk Assessment of Sediment Heavy Metal Pollution in the East Dongting Lake Wetland

Figure 2

Ordination plots of the primary component analysis (PCA) of the metal concentrations of sediment. The direction of an arrow indicates the steepest increase in the variable, and the length indicates the strength relative to other variables. TP, total phosphorus; TN, total nitrogen; SOC, sediment organic carbon; Bulk, bulk density; Moisture, sediment moisture content.