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Long-term changes in the discharge regime in Finland

机译：芬兰排放制度的长期变化

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摘要

This paper presents characteristics of the discharge regime, long-term trends and variability in Finland. A selection of long-term discharge records including both unregulated and regulated rivers and lake outlets were analysed up to the year 2004. In addition to individual time series, monthly and annual discharges from the territory of Finland were calculated for the period 1912-2004. The observed drought and flood periods are also discussed, as well as the connection between discharge regime and climate. Moreover, the periodicity of the time series is examined for a couple of sites. The Mann-Kendall trend test was applied to assess changes in annual, monthly and seasonal mean discharges, maximum and minimum flows and, in addition, the date of the annual peak flow. The trend analysis revealed no changes in mean annual flow in general, but the seasonal distribution of streamflow has changed. Winter and spring mean monthly discharges have increased at most of the observation sites. The spring peak has moved to an earlier date at over one-third of the sites. However, the magnitudes of spring high flow have not changed. Autumn flow did not show trends in general. Minimum flows have increased at about half of the unregulated sites.
机译：本文介绍了排放制度的特点，长期趋势和芬兰的可变性。分析了直到2004年的长期排放记录，包括不受管制和受管制的河流和湖泊出口。除了各个时间序列以外，还计算了1912-2004年期间芬兰领土的月排放量和年排放量。还讨论了观测到的干旱和洪水时期，以及排放制度与气候之间的联系。此外，检查了两个站点的时间序列的周期性。进行了Mann-Kendall趋势检验，以评估年，月和季节平均流量，最大和最小流量以及年度高峰流量的日期的变化。趋势分析表明，平均年流量总体上没有变化，但是流量的季节性分布已经改变。冬季和春季在大多数观察点平均每月排放量增加。春季高峰已移至较早地点的三分之一。但是，弹簧高流量的大小没有改变。秋季流量总体上没有显示趋势。最低流量在大约一半不受管制的地点有所增加。

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  • 来源
    《Hydrology research》 |2010年第4期|P.253-268|共16页
  • 作者

    Johanna Korhonen; Esko Kuusisto;

  • 作者单位

    Finnish Environment Institute (SYKE),PO Box 140,FIN-00251 Helsinki,Finland;

    rnFinnish Environment Institute (SYKE),PO Box 140,FIN-00251 Helsinki,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

    discharge; finland; rivers; runoff; time series; trends;

    机译：排出;芬兰;河流径流;时间序列;趋势;

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