新开口海湾扇贝养殖区环境质量状况分析及评价

Analysis and Evaluation of Environmental Quality in Scallop Breeding Area of Xinkaikou Bay

根据2018年新开口海湾扇贝养殖区水质、沉积物和养殖生物4次的监测数据,按照单因子评价和环境质量综合指数法评价新开口海湾扇贝养殖区环境质量综合状况。新开口扇贝浮筏养殖区水环境监测结果:溶解氧7.17~12.4 mg/L;COD 0.904~1.56 mg/L;无机氮0.0158~0.339 mg/L,活性磷酸盐0.000428~0.0263 mg/L;石油类0.0144~0.0214 mg/L;重金属汞0~0.0000660 mg/L;铜0.000593~ 0.00202 mg/L;铅0.000428~0.00313 mg/L;镉0.0000640~0.000292 mg/L;铬0.000359~0.00276 mg/L;砷0.00107~0.00248 mg/L;各污染指数均小于1,满足海水水质二类要求。表层沉积物中硫化物31.50~34.00 ×10−6 mg/L,有机碳0.23~0.25%;石油类25.10~32.60 ×10−6 mg/L;铜24.30~33.20 ×10−6 mg/L;铅20.10~33.20 ×10−6 mg/L;镉0.14~0.18 ×10−6 mg/L;铬43.60~52.20 ×10−6 mg/L;砷7.83~11.40 ×10−6 mg/L。生物体内污染物质含量符合第一类海洋生物质量标准。环境质量综合指数98.1,养殖区环境质量等级优良。

Based on the monitoring data of water quality, sediment and aquaculture organisms for 4 times in 2018, the comprehensive status of environmental quality in Xinkaiwan Bay scallop breeding area was evaluated by single factor evaluation and environmental quality comprehensive index method. The results of water environment monitoring in the floating raft culture area of Scallop were as follows: dissolved oxygen 7.17~12.4 mg/L;COD 0.904~1.56 mg/L;Inorganic nitrogen 0.0158~ 0.339 mg/L, active phosphate 0.000428~0.0263 mg/L;Petroleum 0.0144~0.0214 mg/L;Mercury 0~0.0000660 mg/L;Copper is 0.000593~0.00202 mg/L;Lead is 0.000428~0.00313 mg/L;Cadmium 0.0000640~0.000292 mg/L;Chrome 0.000359~0.00276 mg/L;Arsenic is 0.00107~0.00248 mg/L;All pollution indexes are less than 1, meeting the requirements of class II seawater quality. Sulfur compounds in surface sediments were 31.50~34.00 ×10−6 mg/L and organic carbon was 0.23%~0.25%. Petroleum 25.10~32.60 ×10−6 mg/L;Copper is 24.30~33.20 ×10−6 mg/L;Lead is 20.10~33.20 ×10−6 mg/L;Cadmium is 0.14~0.18 ×10−6 mg/L;Chrome 43.60~52.20 ×10−6 mg/L;Arsenic is 7.83~11.40 ×10−6 mg/L. The contents of pollutants in the organisms meet the quality standards of category I Marine organisms. The comprehensive index of environmental quality is 98.1, and the environmental quality of the breeding area is excellent.