Distribution and Ecologica Risk of Sediment Heavy Metals in the Water-Level-Fluctuation Zone of the Shawan River Section of Yelang Lake

Table 5

The multiple heavy metals comprehensive potential ecological risk index (RI) and single heavy metal potential ecological risk index () at distinct sampling sites.

Sampling site	Potential ecological risk index ()					Integrated potential ecological risk index (RI)	Pollution level
	Pb	Cr	Cd	Cu	Zn
G	30.83	8.35	517.74	15.40	3.41	575.73	Strong
F	55.87	7.36	747.10	25.23	5.71	841.27	Very strong
E	58.18	7.19	680.32	22.32	5.34	773.35	Very strong
D	46.85	5.30	454.84	22.78	5.56	535.33	Strong
C	40.64	5.53	604.84	16.37	4.75	672.13	Very strong
B	64.85	7.71	584.52	22.51	7.36	686.95	Very strong
A	48.83	4.19	373.55	17.62	7.36	451.55	Strong
Mean	49.43	6.52	566.13	20.32	5.64	648.04	Very strong