大宁河白水河湾回水区网箱养鱼对周围水质的影响  

Impact of Fish Cage Culture on Environmental Water Quality in the Backwater Region of Daning River

作　　者：黄程[1] 邓春光[1] 吴光应 幸治国[1] 刘学斌 

机构地区：[1]重庆市环境科学研究院,重庆401147 [2]巫山县环境监测站,重庆巫山404700

出　　处：《湖北农业科学》2009年第9期2130-2133,共4页Hubei Agricultural Sciences

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07104-006-02);三峡工程生态与环境监测项目(SX2007-013)

摘　　要：以大宁河白水河湾回水区网箱养鱼水质现场监测结果为基础,采用综合营养状态指数法对网箱养鱼水域的现状进行了营养状态评价,并用污染物浓度等值线法进行了网箱养鱼对周围水质的影响分析。结果表明,网箱养鱼区及其影响区水体综合营养状态均为轻度富营养,水质污染程度为轻度污染,其综合营养状态变化总趋势为网箱养鱼区大于网箱影响区;网箱养鱼影响区的Chla浓度明显高于网箱核心区域,由网箱向外呈逐步升高之势,其余污染物浓度的平面分布总趋势是由网箱核心区向网箱影响区由高向低变化;若以超河流背景断面浓度5%作为划定超背景污染带的标准,大宁河白水河湾网箱养鱼引起CODMn、NH3-N、TN、TP和Chla超背景的污染面积分别为10 800、2 400、4 000、9 600和11 200 m2,分别是网箱养鱼区面积(1 000 m2)的10.8、2.4、4.0、9.6和11.2倍。Based on water quality auto-monitoring results in daning river baishuihe firth back water region, adopt a synthesis nutrition state index method to evaluate nourishment of fish cage culture water area. Analyse fish cage culture impact on environmental water quality make use of pollutant concentration isoline method. The results showed that fish cage culture and environmental incidence synthesis nutrition state which have a tendency to interior exceeded exterior as a whole is low-level eutrophication and water quality is low-grade contamination. Kernel exceeded periphery is the tendency of all mentioned pollutants concentration with the exception of Chla. If we demarcate overrun background pollution zone standard with exceeding background concentration over 5%, fish cage culture induce CODMn,NH3-N,TN,TP and Chla overrun background pollution zone area in turn is 10 800,2400,4 000,9 600,and 11 200 centiare. In other words,CODMn,NH3-N,TN,TP and Chla overrun background pollution zone area in turn is 10.8,2.4,4,9.6,and 11.2 multiple of fish cage culture（1 000m^2）.

关 键 词：大宁河 回水区 网箱养鱼 环境水质 

分 类 号：S949[农业科学—水产养殖]