首页> 外文期刊>Hydrology research >Modelling seasonal nitrate concentrations in runoff of a heathland catchment in SW Norway using the MAGIC model: I. Calibration and specification of nitrogen processes
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Modelling seasonal nitrate concentrations in runoff of a heathland catchment in SW Norway using the MAGIC model: I. Calibration and specification of nitrogen processes

机译:使用MAGIC模型模拟挪威西南部荒地集水区径流中的季节性硝酸盐浓度:I.氮过程的校准和规范

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摘要

MAGIC (the Model of Acidification of Groundwater In Catchments) has been widely applied on catchments all over the world. The model has been used with annual time resolution to simulate the long-term effects of acidic deposition on surface water chemistry. Here MAGIC was applied using a monthly time step. The purpose was to simulate observed seasonal nitrate (NO_3) concentrations and fluxes at an upland heathland catchment in southwestern Norway during the period 1993-2004. The rates of the key ecosystem nitrogen (N) processes (mineralization, plant uptake, litterfall and immobilization) were assumed to be governed by temperature. A snow accumulation and melt routine was used. The rates were calibrated to obtain the best match between the observed and simulated NO_3 patterns. The best fit was obtained with standard yearly cycles for deposition and N parameters. The results show that MAGIC can explain 68 and 88% of the variation in seasonal NO_3 concentrations and fluxes, respectively. The calibrated model provides a tool for exploring the effects of future scenarios of climate change and N deposition on NO_3 in streamwater.
机译:MAGIC(集水区地下水酸化模型)已在全世界的集水区得到广泛应用。该模型已用于年时间分辨率,以模拟酸性沉积对地表水化学的长期影响。在这里,MAGIC使用每月时间步长进行应用。目的是模拟1993-2004年期间挪威西南部高地荒地流域的观测到的季节性硝酸盐(NO_3)浓度和通量。假设生态系统的关键氮(矿化,植物吸收,凋落物和固定化)过程的速率受温度控制。使用积雪和融雪程序。校准速率以获得观察到的和模拟的NO_3模式之间的最佳匹配。通过沉积和N参数的标准年度循环可获得最佳拟合。结果表明,MAGIC可以分别解释季节性NO_3浓度和通量变化的68%和88%。校准后的模型为探索未来气候变化和氮沉降对河水中NO_3的影响提供了一种工具。

著录项

  • 来源
    《Hydrology research》 |2009年第3期|198-216|共19页
  • 作者单位

    Norwegian institute for Water Research, Gaustad Alleen 21, N-0349 Oslo, Norway;

    Norwegian institute for Water Research, Gaustad Alleen 21, N-0349 Oslo, Norway;

    Norwegian Institute for Water Research, Southern branch, Televeien 3, N-4879 Qrimstad, Norway;

  • 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

    heathland; model; nitrate; nitrogen deposition; norway; water;

    机译:荒地模型;硝酸盐氮沉积挪威;水;
  • 入库时间 2022-08-18 03:34:37

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