The Strong Impact of Precipitation Intensity on Groundwater Recharge and Terrestrial Water Storage Change in Arizona, a Typical Dryland

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-07-25 DOI:10.1029/2025GL114747

Yuan Qiu, James S. Famiglietti, Ali Behrangi, Mohammad Ali Farmani, Hossein Yousefi Sohi, Aniket Gupta, Fengwei Hung, Karem Abdelmohsen, Guo-Yue Niu

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Abstract

This study demonstrates the critical role of precipitation intensity in groundwater recharge generation and terrestrial water storage (TWS) change. We conducted two experiments driven by precipitation products with close annual totals but distinct intensity in Arizona, using the Noah-MP model with advanced soil hydrology. The experiment with higher precipitation intensity (EXP_HI) produces an annual groundwater recharge of 6.91 mm/year in Arizona during 2001–2020, ∼15 times that of the experiment with lower precipitation intensity (EXP_LI). Correspondingly, EXP_LI produces a declining groundwater storage (GWS) trend of $-$ 0.51 mm/month, nearly triple that of EXP_HI. GWS change dominates the TWS trend. EXP_LI shows a declining TWS trend of $-$ 0.57 mm/month, nearly twice that of EXP_HI. Higher precipitation intensity reduces evapotranspiration and enhances infiltration and percolation, allowing more precipitation to recharge groundwater. This study underscores the need to ensure the accuracy of precipitation intensity in hydrological modeling for reliable water resources assessment and projection.

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降水强度对典型旱地亚利桑那州地下水补给和陆地储水量变化的强烈影响

研究表明，降水强度对地下水补给生成和陆地储水量变化具有重要影响。我们利用Noah-MP模型和先进的土壤水文学，在亚利桑那州进行了两个由年总量接近但强度不同的降水产品驱动的实验。2001-2020年，高降水强度试验（EXPHI）在亚利桑那州产生的年地下水补给量为6.91 mm/年，是低降水强度试验（EXPLI）的15倍。相应的，EXPLI的地下水储存量（GWS）下降趋势为- ${-}$ 0.51 mm/月，几乎是EXPHI的三倍。GWS变化主导TWS趋势。EXPLI的TWS呈下降趋势，为- ${-}$ 0.57 mm/月，几乎是EXPHI的两倍。较高的降水强度减少了蒸散作用，增强了入渗作用，使更多的降水补给地下水。该研究强调了在水文模拟中确保降水强度准确性的必要性，以实现可靠的水资源评估和预测。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.