Characteristics of groundwater drought and its correlation with meteorological and agricultural drought over the North China Plain based on GRACE

IF 7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Ecological Indicators Pub Date : 2024-04-01 DOI:10.1016/j.ecolind.2024.111925

Qingping Liu , Xuan Zhang , Yang Xu , Chong Li , Xiu Zhang , Xuefei Wang

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引用次数: 0

Abstract

Groundwater drought is distinctive comparing with other droughts, featuring high concealment, long duration, and obvious hysteresis. It may have significant negative effects on agriculture, eco-environment, and social economy sectors. Therefore, investigating the temporal and spatial characteristics of groundwater drought and its driving factors is meaningful for monitoring and assessing the risks of groundwater shortage. In this study, a groundwater drought index based on groundwater storage anomalies (GWSAs) derived from GRACE satellites was developed to detect and analyze drought events. The spatiotemporal variations and trends of historical groundwater droughts from 2002 to 2021 in the North China Plain were evaluated. In addition, the correlations between groundwater drought and meteorological and agricultural drought were analyzed by the detrended cross-correlation analysis. The results indicated that (1) the standardized groundwater storage anomaly index (SGSAI) could better identify and characterize groundwater drought by eliminating the spatial heterogeneity of GWSAs; (2) from 2002 to 2021, the intensity, frequency, duration, and area of groundwater drought showed an increasing trend; (3) groundwater drought had an obvious hysteresis (>9 months) to meteorological drought and the correlation between groundwater drought and meteorological drought increased, while the relationship with agricultural drought decreased; (4) long-term overexploitation of groundwater resources might be the main driving factor for the exacerbating groundwater drought in this area.

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基于 GRACE 的华北平原地下水干旱特征及其与气象干旱和农业干旱的相关性

与其他干旱相比，地下水干旱具有隐蔽性强、持续时间长、滞后性明显等特点。它可能对农业、生态环境和社会经济领域产生重大负面影响。因此，研究地下水干旱的时空特征及其驱动因素对于监测和评估地下水短缺风险具有重要意义。本研究基于 GRACE 卫星得出的地下水储量异常（GWSAs）开发了地下水干旱指数，用于探测和分析干旱事件。评估了华北平原 2002 年至 2021 年历史地下水干旱的时空变化和趋势。此外，还利用去趋势交叉相关分析方法分析了地下水干旱与气象干旱和农业干旱之间的相关性。结果表明：（1）标准化地下水储量异常指数（SGSAI）消除了GWSA的空间异质性，能更好地识别和描述地下水干旱；（2）2002-2021年，地下水干旱的强度、频率、持续时间和面积均呈上升趋势；（3）地下水干旱与气象干旱具有明显的滞后性（>；9个月），地下水干旱与气象干旱的相关性增强，而与农业干旱的相关性减弱；（4）地下水资源的长期过度开采可能是该地区地下水干旱加剧的主要驱动因素。

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来源期刊

Ecological Indicators 环境科学-环境科学

CiteScore

11.80

自引率

8.70%

发文量

1163

审稿时长

78 days

期刊介绍： The ultimate aim of Ecological Indicators is to integrate the monitoring and assessment of ecological and environmental indicators with management practices. The journal provides a forum for the discussion of the applied scientific development and review of traditional indicator approaches as well as for theoretical, modelling and quantitative applications such as index development. Research into the following areas will be published. • All aspects of ecological and environmental indicators and indices. • New indicators, and new approaches and methods for indicator development, testing and use. • Development and modelling of indices, e.g. application of indicator suites across multiple scales and resources. • Analysis and research of resource, system- and scale-specific indicators. • Methods for integration of social and other valuation metrics for the production of scientifically rigorous and politically-relevant assessments using indicator-based monitoring and assessment programs. • How research indicators can be transformed into direct application for management purposes. • Broader assessment objectives and methods, e.g. biodiversity, biological integrity, and sustainability, through the use of indicators. • Resource-specific indicators such as landscape, agroecosystems, forests, wetlands, etc.