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首页> 外文期刊>Hydrology research >Three approaches to estimate inorganic nitrogen loading under varying climatic conditions from a headwater catchment in Finland
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Three approaches to estimate inorganic nitrogen loading under varying climatic conditions from a headwater catchment in Finland

机译：估算来自芬兰上游水域的不同气候条件下无机氮负荷的三种方法

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摘要

Inorganic nitrogen loading was simulated using two dynamic catchment scale models, Integrated Nutrients in Catchments-Nitrogen (INCA-N) and the Generalized Watershed Loading Functions (GWLF). The simulated N loading was compared to a standard method to calculate annual loading using measured discharge and discharge-weighted concentrations. The main aim of the study was to compare these three estimation approaches with regards to their performance in hydrologically variable years in a small headwater catchment in southern Finland. Inter-annual variability of INCA-N and GWLF was compared with measured inorganic N concentrations at the catchment outlet. In years where snow melt dominates the annual discharge pattern all methods gave concurrent annual loading estimates. However, the loading estimates differ between the studied methods in years where large rainfall events in late summer or autumn dominate the annual discharge pattern, or when the model was not able to reproduce the spring discharge maximum properly. The results suggest that both models can be useful tools in estimating dissolved inorganic nitrogen loading from a catchment under changing climate conditions, providing that the key influencing driver, hydrology, is well captured.
机译：使用两个动态集水规模模型模拟了集水区-氮中的综合养分（INCA-N）和广义流域负荷函数（GWLF），模拟了无机氮的负荷。将模拟的氮负荷与标准方法进行比较，以使用测得的排放量和排放权重浓度计算年负荷量。该研究的主要目的是比较这三种估算方法在芬兰南部小水源流域的水文可变年中的表现。将INCA-N和GWLF的年际变化与流域出口处测得的无机氮浓度进行了比较。在以融雪为主的年排放量模式中，所有方法都同时给出了年负荷估算值。但是，在不同的研究方法之间，在夏末或秋末的大型降雨事件主导年流量模式的年份中，或者当模型不能正确再现最大的春季流量时，负荷估算值是不同的。结果表明，这两种模型都可以用作估算气候变化条件下集水区溶解无机氮负荷的有用工具，前提是可以很好地捕获影响水文的关键因素。

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  • 来源
    《Hydrology research》 |2009年第3期|167-176|共10页
  • 作者

    I. Baerlund; K. Rankinen; M. Jaervinen; E. Huitu; N. Veijalainen; L. Arvola;

  • 作者单位

    Centre for Environmental Systems Research (CESR), University of Kassel, Kurt-wolters-Strasse 3, D-34125 Kassel, Germany;

    Finnish Environment Institute (SYKE), P.O.Box 140, FI-00251 Helsinki, Finland;

    Finnish Environment Institute (SYKE), Jyvaskyla Office, P.O.Box 35, FI-40014 University of Jyvaskyla, Finland;

    Lammi Biological Station (LBS), University of Helsinki, Paeaejaerventie 320, FI-16900 Lammi, Finland;

    Finnish Environment Institute (SYKE), P.O.Box 140, FI-00251 Helsinki, Finland;

    Lammi Biological Station (LBS), University of Helsinki, Paeaejaerventie 320, FI-16900 Lammi, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    GWLF; INCA-N; inorganic nitrogen loads; modelling; seasonal runoff patterns;

    机译：GWLF;INCA-N;无机氮负荷;造型;季节径流模式;

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