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Variations in the precipitation-runoff relationship of the Weihe River Basin

机译：渭河流域降水－径流关系的变化

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摘要

The main goal of this study is to introduce the Archimedean copulas, which overcome the low accuracy and subjective nature of the traditional double mass curve method, to investigate the precipitation-runoff relationship (PRR) and detect change points in the Weihe River Basin (WRB). With the construction of a joint distribution between precipitation and runoff by the Archimedean copulas, a statistical variable considering the distribution parameter was estimated to judge the change point of the PRR. The results show that (1) annual precipitation and runoff present decreasing trends that are significant and insignificant respectively, at the 95% significance level, while annual potential evapotranspiration (PET) increases slightly; (2) change points of the PRR occurred in 1971 and 1994; (3) the annual runoff changed more dramatically than precipitation during the periods from 1972 to 1994 and 1995 to 2010 compared with 1960-1971, which indicates that in addition to precipitation, there are some other non-precipitation factors that are responsible for the change in the PRR; and (4) the contributions to runoff from human activities declined from 1972 to 1994 (84.15%) and 1995 to 2010 (57.16%). These results suggest that human activities (e.g., irrigation, reservoirs, water-and-soil conservation) were the primary driving forces leading to changes in the PRR in the WRB.
机译：这项研究的主要目的是介绍克服传统双质量曲线法的低准确性和主观性的阿基米德系法，以研究降水-径流关系（PRR）并检测渭河流域（WRB）的变化点）。通过由阿基米德系（Archimedean copulas）建立降水与径流之间的联合分布，估计了考虑分布参数的统计变量，以判断PRR的变化点。结果表明：（1）年降水量和径流量呈现下降趋势，分别在显着水平为95％和显着水平时不显着，而年潜在蒸散量（PET）略有增加； （2）PRR的变更点发生在1971年和1994年； （3）与1960-1971年相比，1972年至1994年以及1995年至2010年期间的年径流量变化比降水变化大得多，这表明，除降水量外，还有其他一些非降水因素是造成变化的原因在PRR中； （4）人类活动对径流的贡献从1972年至1994年（84.15％）和1995年至2010年（57.16％）下降。这些结果表明，人类活动（例如灌溉，水库，水土保持）是导致WRB PRR发生变化的主要驱动力。

著录项

  • 来源
    《Nordic hydrology》 |2017年第2期|295-310|共16页
  • 作者

    Aijun Guo; Jianxia Chang; Dengfeng Liu; Yimin Wang; Qiang Huang; Yunyun Li;

  • 作者单位

    State Key Latioratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China;

    State Key Latioratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China;

    State Key Latioratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China;

    State Key Latioratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China;

    State Key Latioratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China;

    State Key Latioratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, 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

    Archimedean copulas; climate change; human activities; precipitation-runoff relationship; Weihe River Basin;

    机译：阿基米德copulas;气候变化;人类活动;降水－径流关系;渭河流域;

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