Figure 1.
Map of Hongfeng and Baihua Reservoirs on the Yunnan-Guizhou Plateau, Southwest China.
Figure 2.
Distribution of main point sources of pollution in the Hongfeng and Baihua Reservoir basins.
Table 1.
Locations of sampling sites in the Hongfeng and Baihua Reservoirs on the Yunnan-Guizhou Plateau, Southwest China.
Table 2.
Ecological risk assessment criteria for the sediment quality guidelines (SQGs) and Hakanson index.
Table 3.
Summary statistics for heavy metal concentrations in surface sediments from the Hongfeng and Baihua Reservoirs.
Figure 3.
Heavy metal concentrations in surface sediments from Hongfeng and Baihua Reservoirs.
Table 4.
Correlations between heavy metals in surface sediments from the Hongfeng and Baihua Reservoirs.
Table 5.
Principal Component Analysis (PCA) for heavy metals in surface sediments from the Hongfeng and Baihua Reservoirs.
Figure 4.
Mean PEC quotient (a) and potential ecological risk indexes (b) of heavy metals in sediments.
Table 6.
Results of ecological risk assessments for single heavy metal from two methods for the Hongfeng and Baihua Reservoirs.
Figure 5.
Comparison of heavy metal concentrations in sediments.
(HFT: sites at inlets of main tributaries in the Hongfeng Reservoir, namely sites 1–5; HFR: representative sites within Hongfeng Reservoir, namely sites 6–13; BHT: sites at inlets of main tributaries in the Baihua Reservoir (except site 14), namely sites 15–22; BHR: representative sites within the Baihua Reservoir, namely sites 23–26).