大沽河河口区氮磷营养盐输移转化行为研究  

Nitrogen,Phosphate Transport and Transformation Research at Dagu Estuary

作　　者：马晓波[1] 尹则高[2] 孙寓姣[3] 王震宇[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]中国海洋大学工程学院,山东青岛266100 [3]北京师范大学水科学研究院,北京100875

出　　处：《中国海洋大学学报（自然科学版）》2015年第11期100-108,共9页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(51009123;51579229)资助

摘　　要：基于MIKE21软件,建立潮流、径流耦合作用下大沽河河口区氮磷营养盐输移转化数学模型。利用数学模型,对实测工况进行了模拟,并与相应的实测资料进行验证;在此基础上,对不同径流和排污条件下的氮磷营养盐分布进行预测分析。结果表明:大沽河口附近DO浓度较低,氨氮、硝酸盐和磷酸盐浓度较高。平水期流量条件下,上述物质进入胶州湾后有偏向河口右侧海岸的趋势。丰水期流量条件下,各水质参数的分布趋向均匀;上述物质进入胶州湾后基本上呈现以河口纵向主槽为对称轴,两侧对称分布的特征。不同排污条件下,河口附近DO从北向南基本呈现递增趋势,而氨氮、硝酸盐和磷酸盐则相反。一、二级污水排放条件下,河口附近DO符合一类海水水质标准;而无机氮和磷酸盐为超四类海水水质标准。Based on the commercial software of Mike 21,a transport and transformation mathematical model of nitrogen and phosphate for Dagu Estuary is established considering the coupled action of runoff and tide.It was adopted to simulate a representative case and validated with the measured data.The nitrogen and phosphate distribution was predicted with different runoff discharge rate and sewage discharge standard by the aforementioned mathematical model.It was found that DO is lower,but NH＋4,NO-3and PO-4are higher near Dagu Estuary.At median water period of Dagu river,these material deflect to right side of the rive mouth when they enter in Jiaozhou bay.At flood period of Dagu river,the aforementioned water quality parameters distribute relative uniformly,and they distribute symmetrically with longitudinal thalweg for symmetrical axis.For different grades of Integrated Wastewater Discharge Standard（IWDS）,DO increases from north side to south side near Dagu Estuary,but NH＋4,NO-3and PO-4are just the opposite.Both for first and second grade conditions of IWDS,DO meets the first grade of Sea Water Quality Standard,but inorganic nitrogen and PO-4exceed the fourth grade of Sea Water Quality Standard near Dagu Estuary,respectively.

关 键 词：大沽河河口 无机氮 磷 数值模拟 

分 类 号：P731.2[天文地球—海洋科学]