黑河流域梯级库区沉积物氮磷营养盐和重金属分布特征及污染评价
王昱, 范逸扬, 袁辉, 王哲辉, 先锋云, 田苗, 袁兴鹏

Characteristics and assessment of nutrient and heavy metal pollution in the cascade reservoir sediments of the Heihe River Basin
Yu Wang, Yiyang Fan, Hui Yuan, Zhehui Wang, Fengyun Xian, Miao Tian, Xingpeng Yuan
表5 Igeo与重金属污染程度
Table 5 Igeo and the degree of heavy metal contamination
污染 程度Igeo
≤00~11~22~33~44~5>5
程度清洁轻度轻中度中度重度严重极严重
级数0123456