Water quality assessment using integrated modeling and monitoring in Narva Bay, Gulf of Finland
Water quality assessment using integrated modeling and monitoring in Narva Bay, Gulf of Finland
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DOI：
10.1007/s10666-006-9045-7
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发表时间：
2006-10
影响因子：
2.4
通讯作者：
G. Lessin;U. Raudsepp
中科院分区：
文献类型：
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作者：
G. Lessin;U. Raudsepp
采用三维水动力-生态耦合模型对纳尔瓦湾一个生物活跃期的水质进行了评价。纳尔瓦湾位于芬兰湾东南部。纳尔瓦河有一个集水区，覆盖了俄罗斯和爱沙尼亚的部分地区，将水和营养物质排放到纳瓦湾。生态模型以浮游植物碳、氮、磷、叶绿素、浮游动物、碎屑碳、氮、磷、无机氮、无机磷和溶解氧为状态变量。水动力模型和生态系统模型都是使用有限数量的测量进行验证的。水动力模型的验证包括比较海流和温度、盐度分布的时间序列。将生态模型结果与浮游植物生物量、总氮磷、溶解氧监测数据进行比较。水动力参数、浮游植物生物量、表层总磷、溶解氧和近底层总氮的比较是合理的。计算了整个纳尔瓦湾的空间平均值和选定参数的标准差的时间序列。结合模型结果和监测数据，估算了浮游植物生物量、总氮磷和近底层溶解氧的特征浓度。浮游植物生物量和总磷存在季节变化，春季水华分别为0.60~1.1m g/L和0.022~0.032 mg/L，夏季分别为0.10~0.3m g/L和0.015~0.025 m g/L，秋季水华分别为0.2~0.6和0.017~0.035 m g/L。总氮和近底氧浓度比较稳定，分别为0.25-0.35 mg/L和2-6 mg/L。总氮和总磷浓度显示，根据爱沙尼亚近海水域的分类，纳尔瓦湾水属于良好的水质类别。
A coupled three-dimensional hydrodynamic–ecological model was used for the assessment of water quality in Narva Bay during one biologically active season. Narva Bay is located in the south-eastern Gulf of Finland. Narva River with a catchment’s area covering part of Russia and Estonia discharges water and nutrients to Narva Bay. The ecological model includes phytoplankton carbon, nitrogen and phosphorus, chlorophylla, zooplankton, detritus carbon, nitrogen and phosphorus, inorganic nitrogen, inorganic phosphorus and dissolved oxygen as state variables. Both the hydrodynamic and ecosystem models were validated using a limited number of measurements. The hydrodynamic model validation included comparison of time series of currents and temperature and salinity profiles. The ecological model results were compared with the monitoring data of phytoplankton biomass, total nitrogen and phosphorus and dissolved oxygen. The comparison of hydrodynamic parameters, phytoplankton biomass, surface layer total phosphorus and dissolved oxygen and near-bottom layer total nitrogen was reasonable. Time series of spatially mean values and standard deviations of selected parameters were calculated for the whole Narva Bay. Combining model results and monitoring data, the characteristic concentrations of phytoplankton biomass, total nitrogen and phosphorus and near-bottom dissolved oxygen were estimated. Phytoplankton biomass and total phosphorus showed seasonal variations, of 0.6–1.1 and 0.022–0.032 mg/l, respectively, during spring bloom, 0.1–0.3 and 0.015–0.025 mg/l in summer and 0.2–0.6 and 0.017–0.035 mg/l during autumn bloom. Total nitrogen and near-bottom oxygen concentrations were rather steady, being 0.25–0.35 and 2–6 mg/l, respectively. The total nitrogen and phosphorus concentrations show that according to the classification of Estonian coastal waters, Narva Bay water belongs to a good water quality class.