Research Article
Pollution Characteristics and Possible Sources of Seldom Monitored Trace Elements in Surface Sediments Collected from Three Gorges Reservoir, China
Table 2
Description of sediment quality.
| | rank | | Pollution level |
| | 6 | >5 | Extremely contaminated | | 5 | 4~5 | Strongly to extremely strongly contaminated | | 4 | 3~4 | Strongly contaminated | | 3 | 2~3 | Moderately to strongly contaminated | | 2 | 1~2 | Moderately contaminated | | 1 | 0~1 | Uncontaminated to moderately contaminated | | 0 | <0 | Uncontaminated |
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