Model for the Assessment of Seawater Environmental Quality Based on Multiobjective Variable Fuzzy Set Theory

Table 2

Monitoring results regarding seawater quality in the Qingdao dumping site in 2003.

Sampling point	COD	OIL	DO	Inorganic nitrogen	PO4-P	Cu	Pb	Zn	Cd
Q1	0.655	0.051	7.678	108.500	9.050	3.183	1.553	41.425	0.176
Q2	0.705	0.049	7.620	121.000	6.350	4.393	1.940	73.767	0.208
Q3	0.680	0.027	7.612	131.000	8.100	4.768	4.133	38.775	0.378
Q4	0.735	0.034	7.567	102.500	8.150	4.023	1.228	29.725	0.130
Q5	0.700	0.034	7.502	101.500	6.550	5.982	2.493	57.383	0.226
Q6	0.750	0.029	7.553	88.000	6.550	3.475	2.298	49.400	0.286
Q7	0.935	0.100	7.635	128.500	6.300	3.265	2.867	45.925	0.193
Q8	0.835	0.049	7.635	122.000	7.900	4.393	1.522	33.958	0.124
Q9	0.600	0.062	7.519	97.500	5.950	3.143	2.317	39.675	0.201
Q10	0.585	0.018	7.572	92.000	5.900	4.957	1.253	27.350	0.143
Q11	0.640	0.024	7.594	97.000	6.850	3.407	2.218	35.150	0.154
Q12	0.670	0.028	7.676	84.500	6.100	4.517	2.192	41.200	0.188
Q13	0.655	0.021	7.517	83.500	4.850	6.967	2.670	32.792	0.248
Q14	0.725	0.023	7.635	97.000	6.250	3.660	2.678	32.542	0.187

The units for COD, oil and DO are mg/L; the units for inorganic nitrogen, PO₄-P, Cu, Pb, Zn and Cd are μg/L.