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首页> 外文期刊>Nordic hydrology >Do catchment characteristics explain differences in coherence and trends in hydroclimatic behaviour in an upland region?
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Do catchment characteristics explain differences in coherence and trends in hydroclimatic behaviour in an upland region?

机译：集水区特征是否解释了高地地区的连贯性和水气候行为趋势的差异？

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摘要

To explore the link between catchment characteristics and sensitivity to environmental change, longer-term data from 21 contrasting mesoscale (67-690 km~2) catchments in northern Scotland were analysed to examine the influence of hydroclimatic drivers on hydrological response. Cluster analysis was used to classify the catchments into four distinct groups, with topography and annual precipitation being the two most significant differentiating factors. Using 12 years of data from the 21 sites, inter-catchment coherence of intra- and inter-annual variation of precipitation, air temperatures and stream discharge were assessed both within and between clusters. Whilst catchments in clusters characterised by lower elevations exhibited coherence in hydroclimatic drivers and streamflow response, the higher altitude catchments did not. Annual trends were evident for widespread increases in temperature and also increasing values of precipitation in the higher elevation catchments. Seasonal trends indicate a lack of consistent change during winter, but most other seasons exhibit an increase in temperatures, with isolated increases in measures of precipitation and discharge particularly during the transitional seasons of spring and autumn. These trends ultimately could not be related with catchment typology where increasing upland area results in a breakdown of hydroclimatic coherence between sites.
机译：为了探索流域特征与环境变化敏感性之间的联系，分析了苏格兰北部21个中尺度（67-690 km〜2）流域的长期数据，以研究水文气候驱动因素对水文响应的影响。使用聚类分析将集水区分为四个不同的组，其中地形和年降水量是两个最重要的区分因素。利用来自21个站点的12年数据，评估了集群内部和集群之间年际和年际降水，空气温度和溪流排放的集水之间的连贯性。虽然以较低海拔为特征的集群集水区在水文气候驱动器和水流响应中表现出连贯性，但高海拔集水区却没有。明显的年度趋势是温度普遍升高，高海拔流域的降水量也增加。季节趋势表明冬季缺乏一致的变化，但大多数其他季节的温度均升高，尤其是在春季和秋季的过渡季节，降水和流量的测量值出现单独的增加。这些趋势最终与流域类型没有关系，在流域类型上，高地面积的增加导致站点之间水文气候连贯性的破坏。

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  • 来源
    《Nordic hydrology》 |2014年第6期|817-837|共21页
  • 作者

    Scott J. McGrane; Doerthe Tetzlaff; Richard Essery; Chris Soulsby;

  • 作者单位

    Northern Rivers Institute, School of Geography, University of Aberdeen, Aberdeen AB24 3UF, UK;

    Northern Rivers Institute, School of Geography, University of Aberdeen, Aberdeen AB24 3UF, UK;

    Grant Institute, School of Geosciences, University of Edinburgh, Edinburgh EH9 3JW, UK;

    Northern Rivers Institute, School of Geography, University of Aberdeen, Aberdeen AB24 3UF, UK;

  • 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

    classification; climate; clusters; hydrology; trends;

    机译：分类;气候;集群水文学趋势;

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