Risk Assessment and Prediction of Heavy Metal Pollution in Groundwater and River Sediment: A Case Study of a Typical Agricultural Irrigation Area in Northeast China

Table 5

Assessment of heavy metal pollution degree risks in sediment.

Number	Thickness (cm)					CPI
		N10-1	0–26	0.78	0.23		0.24	0.44	0.42
N10-2	26–40	0.59	0.15	0.07	0.36	0.29
N11-1	0–25	1.43	0.48	0.51	1.07	0.87
N11-2	25–45	1.23	0.37	0.40	0.85	0.71
N11-3	45–50	0.76	0.26	0.24	0.61	0.47
N12-1	0–50	1.84	0.31	0.62	2.23	1.25
N13-1-1	0–5	1.13	0.33	0.36	0.96	0.69
N13-1-2	5–30	0.27	0.10	0.05	0.32	0.18
N13-2-1	0–15	0.86	0.28	0.39	0.63	0.54
N13-2-2	15–40	1.39	0.51	0.37	0.87	0.78
N13-2-3	40–64	1.39	0.41	0.59	0.87	0.81
N14-1	0–23	0.88	0.34	0.40	0.56	0.54
N14-2	23–30	0.97	0.41	0.36	0.68	0.61
N14-3	30–40	1.32	0.56	0.56	1.16	0.90
N14-4	40–50	0.50	0.23	0.23	0.42	0.34
N16-1	0–26	0.76	0.24	0.27	0.57	0.46
N16-2	26–50	0.73	0.26	0.18	0.60	0.44
N17	0–32	0.73	0.13	0.11	0.43	0.35
N18	0–28	1.42	0.26	0.35	1.29	0.83
N19-1	0–5	1.10	0.19	0.57	0.56	0.60
N19-2	5–25	1.77	0.44	0.56	1.76	1.13
N20-1	0–29	1.46	0.26	0.67	1.21	0.90
N21-1	0–5	1.22	0.29	0.40	1.67	0.90
N21-2	5–26	2.47	0.86	1.28	4.07	2.17
N24-1	Surface layer	0.45	0.15	0.14	0.45	0.30
S14-1	Surface layer	0.93	0.31	0.31	0.70	0.56
S16-1	Surface layer	0.22	0.08	0.05	0.27	0.15
S19-1	0–44	1.08	0.77	0.38	1.02	0.81
S19-2	0–44	1.05	0.81	0.42	0.80	0.77
S20-1	0–13	1.88	0.46	0.77	2.04	1.29
S20-2	13–22	0.92	0.28	0.21	0.75	0.54