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首页> 外文期刊>Nordic hydrology >Similarity, difference and correlation of meteorological and hydrological drought indices in a humid climate region - the Poyang Lake catchment in China
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Similarity, difference and correlation of meteorological and hydrological drought indices in a humid climate region - the Poyang Lake catchment in China

机译：阳湖流域湿润地区气象水文干旱指数的异同。

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摘要

Based on the estimation of standardized precipitation-evapotranspiration index (SPED and standardized runoff index (SRI), this study investigated the variability and correlation of hydrological drought and meteorological drought in a humid climate region - the Poyang Lake catchment in China. Results indicate that the occurrences of hydrological droughts in the catchment are different from those of meteorological drought on both a seasonal and annual basis. However, annual variability of both indices showed the same periodic variation characteristics during the study period. with comparison of the performance of SPEI and SRI time series at different timescales, our observation reveals that the two drought indices show a higher degree of similarity and correlation as timescales increased. In addition, SRI is found to be less variable than SPEI at shorter timescales and it shows an obvious hydrologic delay of about 1-2 months in response to SPEI at timescales > 12 months. Due to hydrologic detention of subsurface soil moisture, shallow groundwater and perhaps reservoir storage, a 2-month timescale of SPEI is found to be more appropriate for river discharge monitoring, especially for those rivers with similar drainage area, climate and geographical conditions as in this study region.
机译：在估算标准降水-蒸散指数（SPED和标准径流指数（SRI））的基础上，本研究调查了湿润地区（中国Po阳湖流域）的水文干旱和气象干旱的变异性和相关性。流域内水文干旱的发生在季节和年度上都不同于气象干旱，但是，在研究期间，两个指数的年度变化都表现出相同的周期性变化特征，并比较了SPEI和SRI时间的表现。在不同时间尺度上的序列，我们的观察表明，随着时间尺度的增加，两个干旱指数显示出更高的相似度和相关性；此外，在较短的时间尺度上，SRI的变化小于SPEI，并且表现出明显的水文延迟约1在大于12个月的时间范围内，对SPEI响应为-2个月。 c保留地下土壤水分，浅层地下水和可能的水库，SPEI的2个月时间表被认为更适合于河流流量的监测，特别是对于与本研究区域类似的流域，气候和地理条件的河流。

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  • 来源
    《Nordic hydrology》 |2016年第6期|1211-1223|共13页
  • 作者

    Xuchun Ye; Xianghu Li; Chong-Yu Xu; Qi Zhang;

  • 作者单位

    School of Geographical Sciences, Southwest University, Chongqing 400715, China;

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

    Department of Geosciences,University of Oslo,Oslo,Norway Department of Earth Sciences, Uppsala University, Sweden;

    Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Jiangxi 330000, 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

    drought variability; hydrological drought; meteorological drought; Poyang Lake catchment;

    机译：干旱多变性水文干旱;气象干旱;yang阳湖流域;

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