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首页> 外文期刊>Nordic hydrology >Investigation of the drought-flood abrupt alternation of streamflow in Poyang Lake catchment during the last 50 years
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Investigation of the drought-flood abrupt alternation of streamflow in Poyang Lake catchment during the last 50 years

机译：近50年catch阳湖流域旱涝流量突变分析。

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摘要

Drought-flood abrupt alternation (DFAA) is one of the remarkable manifestations of the summer monsoon anomaly at the subseasonal scale and can result in severe damage. This study identified and analyzed DFAA in terms of streamflow in the Poyang Lake catchment over the last 50 years based on a DFAA index (DFAAI). The study also investigated the intra-annual distribution characteristics and long-term tendencies associated with DFAA, as well as the relationship with precipitation patterns. A statistical analysis showed that drought-to-flood events in the Poyang Lake catchment generally occur in March and April, while flood-to-drought events occur in July and August. A Mann-Kendall test indicated a long-term decreasing trend in DFAAI in March and April and a slight increasing trend in July and August; however, the trends were not statistically significant. Flood-to-drought events occurred more frequently than did drought-to-flood events at the decadal scale, especially in the 1960s and 1970s. The particular distribution of precipitation in the Poyang Lake catchment mainly determined the occurrence patterns of DFAA events, but intensive human activities are also significant factors that have decreased and mitigated DFAA disasters since the 1980s in the Poyang Lake catchment.
机译：旱涝突变（DFAA）是亚季节尺度夏季季风异常的显着表现之一，可能导致严重破坏。这项研究基于DFAA指数（DFAAI），根据and阳湖流域过去50年的径流确定并分析了DFAA。该研究还调查了与DFAA相关的年内分布特征和长期趋势，以及与降水模式的关系。统计分析表明，Po阳湖流域的旱涝事件一般发生在3月和4月，而洪涝灾害发生在7月和8月。 Mann-Kendall检验表明，DFAAI在3月和4月呈长期下降趋势，而7月和8月则呈小幅上升趋势。但是，趋势没有统计学意义。在十年尺度上，旱灾事件发生的频率比旱灾事件发生的频率更高，尤其是在1960年代和1970年代。 the阳湖流域降水的特殊分布主要决定了DFAA事件的发生方式，但是人类密集的活动也是自1980年代以来Lake阳湖流域减少和减轻DFAA灾害的重要因素。

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  • 来源
    《Nordic hydrology》 |2017年第6期|1402-1417|共16页
  • 作者

    Xianghu Li; Qi Zhang; Dan Zhang; Xuchun Ye;

  • 作者单位

    Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of sciences, Nanjing 210008, China;

    Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of sciences, Nanjing 210008, China,corresponding author,Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, china;

    Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of sciences, Nanjing 210008, China;

    School of Geographical Sciences. Southwest University, No. 2 Tiansheng Road, Chongqing 400715, China;

  • 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

    DFAAI; drought-flood abrupt alternation; Poyang Lake catchment; precipitation; streamflow;

    机译：DFAAI;旱涝突变yang阳湖流域;沉淀;水流;

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