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我们首次开发了一个集水区模型,对波罗的海流域内所有105个主要集水区的陆地-海洋养分通量同时进行了模拟。对所有这些主要集水区进行一致模拟的方法,即水通量(水文模拟)和负荷功能(排放数据)的一致处理,将促进波罗的海差别巨大的子流域之间河流养分运输的比较。河流排放的热点,如维斯瓦河、奥得河、道加瓦河或丹麦海岸,可以很容易地被展示;并且这些热点及北部集水区中相对未被干扰的河流之间的比较可为决策者指明:1)要改善波罗的海环境状况,在哪里采取补救措施最有效。2)河流养分负荷可能削减的百分比是多少。验证期内实测通量与模拟通量之间的相对差异通常很小。监测水体流量和养分通量的累积偏差(即相对偏差)[∑(模拟-实测)/∑实测×100(%)]总计为径流+8.2%,可溶性无机氮-2.4%,总氮+5.1%,可溶性无机磷+13%,总磷+19%。并且,该模型认为,现存的污染负荷汇编资料中低估了总磷点源,因为在市政府的排放负荷计算中存在着矛盾。
For the first time, we developed a catchment model that simulates land-sea nutrient fluxes in all 105 major catchments in the Baltic Basin. The consistent modeling of all these major catchments, the consistent treatment of water flux (hydrological simulation) and load function (emission data), will facilitate comparisons of river nutrient transport across the vast Baltic Sea sub-basins. Hotspots of river discharge, such as the Vistula, Oder, Daugava or Danish coasts, can easily be demonstrated; and the comparison between these hot spots and relatively undisturbed rivers in the northern catchment can be To policymakers: 1) Where remedial measures are most effective in order to improve the state of the Baltic Sea environment. 2) What percentage of river nutrient load may be reduced? The relative differences between the measured flux and the simulated flux during the validation period are usually small. The cumulative deviations (ie, relative deviations) of water flow and nutrient fluxes monitored were Σ + (simulated - measured) / Σ measured × 100 , Soluble inorganic phosphorus + 13%, total phosphorus + 19%. Moreover, the model assumes that the TPP sources are underestimated in the compilation of existing pollution loads because of contradictions in the calculation of the municipal government’s discharge load.