汉江上游水体沉积物污染状况分析与评价

杨婵, 吴娟娟, 车旭曦, 岳思羽, 刘智峰, 宋凤敏

Pollution analysis and assessment of sediments in the upper reaches of the Hanjiang River

YANG Chan, WU Juan-Juan, CHE Xu-Xi, YUE Si-Yu, LIU Zhi-Feng, SONG Feng-Min

表1 沉积物中重金属的地累积指数污染程度分类

Table 1 Contamination level of sediment by heavy metals classified based on Igeo

地累积指数Igeo Igeo< 0 0≤I geo< 1 1≤I geo< 2 2≤I geo< 3 3≤I geo< 4 4≤I geo< 5 I geo≥5 等级 0 1 2 3 4 5 6 污染程度 无污染 无—中污染 中度污染 中强污染 强污染 强—极强污染 极强污染