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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Groundwater Storage Changes: Present Status from GRACE Observations
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Groundwater Storage Changes: Present Status from GRACE Observations

机译：地下水储量变化：GRACE观测的现状

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摘要

Satellite gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) provide quantitative measurement of terrestrial water storage (TWS) changes with unprecedented accuracy. Combining GRACE-observed TWS changes and independent estimates of water change in soil and snow and surface reservoirs offers a means for estimating groundwater storage change. Since its launch in March 2002, GRACE time-variable gravity data have been successfully used to quantify long-term groundwater storage changes in different regions over the world, including northwest India, the High Plains Aquifer and the Central Valley in the USA, the North China Plain, Middle East, and southern Murray-Darling Basin in Australia, where groundwater storage has been significantly depleted in recent years (or decades). It is difficult to rely on in situ groundwater measurements for accurate quantification of large, regional-scale groundwater storage changes, especially at long timescales due to inadequate spatial and temporal coverage of in situ data and uncertainties in storage coefficients. The now nearly 13 years of GRACE gravity data provide a successful and unique complementary tool for monitoring and measuring groundwater changes on a global and regional basis. Despite the successful applications of GRACE in studying global groundwater storage change, there are still some major challenges limiting the application and interpretation of GRACE data. In this paper, we present an overview of GRACE applications in groundwater studies and discuss if and how the main challenges to using GRACE data can be addressed.
机译：重力恢复和气候实验（GRACE）的卫星重力测量以前所未有的精度提供了对陆地储水量（TWS）变化的定量测量。将GRACE观测到的TWS变化与土壤，雪和地表水库中水变化的独立估计值相结合，可以估算地下水储量变化。自2002年3月启动以来，GRACE时变重力数据已成功用于量化世界不同地区（包括印度西北部，高平原含水层和美国中部山谷，北部）的长期地下水储量变化。中国的平原，中东和澳大利亚的墨累达令盆地南部，近年来（或几十年）那里的地下水储量已大大减少。很难依靠原位地下水测量来准确量化大型，区域规模的地下水储量变化，尤其是在很长的时间尺度上，这是因为原位数据的时空覆盖不足以及储水系数的不确定性。 GRACE重力数据已有近13年的历史，为全球和区域基础上的地下水变化监测和测量提供了一个成功而独特的补充工具。尽管GRACE在研究全球地下水储量变化方面取得了成功的应用，但仍然存在一些重大挑战，限制了GRACE数据的应用和解释。在本文中，我们概述了GRACE在地下水研究中的应用，并讨论了是否以及如何解决使用GRACE数据的主要挑战。

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