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Analysis of changes in drought and terrestrial water storage in the Tarim River Basin based on principal component analysis

机译：基于主成分分析的塔里木河流域干旱和陆地储水变化分析

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摘要

Drought is a widespread natural hazard. In this study, the potential factors affecting spatiotemporal changes of drought in the Tarim River Basin (TRB), China, were investigated using the empirical orthogonal function (EOF) and multiple hydro-meteorological indicators such as the standardized precipitation index (SPI), standardized soil moisture index (SSI), and terrestrial water storage (TWS). The following major conclusions were drawn. (1) Inconsistent variations between SPIs/SSIs and TWS in the TRB indicate a groundwater deficit in 2002-2012. (2) The results of EOF indicate that soil moisture in the TRB was significantly affected by precipitation. However, the variations between the EOFs of SSIs and those of TWS were not identical, which indicates that soil water had less effect on TWS than groundwater. (3) Drought evaluations using SPI and SSI showed that a long drought duration occurred over a long accumulation period, whereas a high frequency of drought was related to a short accumulation period. (4) Hydrological features related to extreme soil moisture conditions in the TRB could also be influenced by the El Nino-Southern Oscillation. The findings of this study are significant for use in drought detection and for making water management decisions.
机译：干旱是一个广泛的自然危害。在这项研究中，使用经验正交功能（EOF）和多种水流气象指标（如标准化降水指数（SPI），对塔里木河流域（TRB）中干旱旱地天空变化的潜在因素进行调查，如标准化降水指数（SPI），标准化土壤湿度指数（SSI）和地面储水（TWS）。以下得出以下主要结论。 （1）TRB中SPI / SSI和TWS之间的不一致变化表明2002 - 2012年的地下水赤字。 （2）EOF的结果表明TRB中的土壤水分受到沉淀的显着影响。然而，SSIS的EOF和TWS的差异不相同，这表明土壤水对TWS的影响比地下水较小。 （3）使用SPI和SSI的干旱评估表明，长期累积期发生了长期的干旱持续时间，而高频率的干旱频率与短累积期有关。 （4）与TRB中的极端土壤水分条件相关的水文特征也可能受到EL Nino-Southern振荡的影响。该研究的结果对于干旱检测和制造水管理决策是显着的。

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  • 来源
    《Nordic Hydrology》 |2019年第2期|761-777|共17页
  • 作者

    Xia Jun; Yang Peng; Zhan Chesheng; Qiao Yunfeng;

  • 作者单位

    Chinese Acad Sci Key Lab Water Cycle & Related Land Surface Proc Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China|Wuhan Univ State Key Lab Water Resources & Hydropower Engn S Wuhan 430000 Hubei Peoples R China|China Univ Geosci Sch Geog & Informat Engn Wuhan 430074 Hubei Peoples R China;

    Chinese Acad Sci Key Lab Water Cycle & Related Land Surface Proc Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China|Wuhan Univ State Key Lab Water Resources & Hydropower Engn S Wuhan 430000 Hubei Peoples R China|China Univ Geosci Sch Geog & Informat Engn Wuhan 430074 Hubei Peoples R China;

    Chinese Acad Sci Key Lab Water Cycle & Related Land Surface Proc Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China;

    Chinese Acad Sci Key Lab Water Cycle & Related Land Surface Proc Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R 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 change; principal component analysis; Tarim River Basin; teleconnection indices; terrestrial water storage;

    机译：干旱改变;主成分分析;塔里木河流域;电信储存;陆地储水;

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