Integrated Hydrologic Modeling to Untangle the Impacts of Water Management During Drought

Integrated Hydrologic Modeling to Untangle the Impacts of Water Management During Drought
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综合水文模型揭示干旱期间水管理的影响

DOI:
10.1111/gwat.12995
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发表时间:
2020
期刊:
影响因子:
2.6
通讯作者:
Maxwell, Reed M.
Maxwell, Reed M.
中科院分区:
地球科学3区
文献类型:
--
作者:
Thatch, Lauren M.;Gilbert, James M.;Maxwell, Reed M.

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在过去的一个世纪里,加州圣华金河谷一些地区的地下水位下降了30多米,这主要是由于用于灌溉农田和维持不断增长的人口而过度抽取地下水。2012年至2015年,加州经历了有史以来最严重的干旱,地表水供应枯竭,进一步加剧了该地区地下水的枯竭。由于缺乏对地下水的监管,加州抽取地下水的确切数量是未知的,也很难量化。最近通过的《可持续地下水管理法》加强了确定可持续地下水利用的努力。然而,在一个具有极其复杂的地表水分配系统、多变的地下水利用以及空间广泛和多样化的灌溉实践的高产农业系统中,理解可持续利用并非易事。利用综合水文模型和陆地表面模型,我们评估了水管理活动,特别是一套灌溉和地下水抽水情景,如何影响地表水-地下水通量和储存成分,以及这些活动及其之间的关系在干旱期间如何变化。结果表明,地下水抽水量对长期蓄水量变化的影响最为显著。与美国宇航局重力恢复和气候实验(GRACE)估算的总储水量异常(TWSA)进行比较,提供了一些关于抽水和灌溉组合与GRACE TWSA估算相匹配的见解,为这些情景提供了可信度。此外,在最近的干旱期间,大部分长期储水量的变化发生在地下深层的地下水储存中。
Over the past century, groundwater levels in California's San Joaquin Valley have dropped by more than 30 m in some areas mostly due to excessive groundwater extraction used to irrigate agricultural lands and sustain a growing population. Between 2012 and 2015, California experienced the worst drought in its recorded history, depleting surface water supplies and further exacerbating groundwater depletion in the region. Due to a lack of groundwater regulation, exact quantities of extracted groundwater in California are unknown and hard to quantify. Recent adoption of the Sustainable Groundwater Management Act has intensified efforts to identify sustainable groundwater use. However, understanding sustainable use in a highly productive agricultural system with an extremely complex surface water allocation system, variable groundwater use, and spatially extensive and diverse irrigation practices is no easy task. Using an integrated hydrologic model coupled with a land surface model, we evaluated how water management activities, specifically a suite of irrigation and groundwater pumping scenarios, impact surface water–groundwater fluxes and storage components and how those activities and the relationships between them change during drought. Results showed that groundwater pumping volume had the most significant impact on long‐term water storage changes. A comparison with total water storage anomaly (TWSA) estimates from NASA's Gravity Recover and Climate Experiment (GRACE) provided some insight regarding which combinations of pumping and irrigation matched the GRACE TWSA estimates, lending credibility to these scenarios. In addition, the majority of long‐term water storage changes during the recent drought occurred in groundwater storage in the deeper subsurface.
地下水位配置对加利福尼亚州圣华金河流域行星边界层的影响
DOI: 10.1175/jhm-d-16-0134.1
发表时间: 2017
影响因子: 3.8
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通讯作者: D. Gochis
对比融雪主导的农业盆地的变暖和干旱:揭示海拔梯度在区域对温度变化响应中的作用
DOI: --
发表时间: 2018
影响因子: 6.7
作者:
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发表时间: 2017-05
影响因子: 3.8
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M. Sulis;John L. Williams;P. Shrestha;M. Diederich;C. Simmer;S. Kollet;R. Maxwell
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DOI: --
发表时间: 2006
期刊:
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作者:
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通讯作者: J. Bredehoeft