Comparison of seasonal terrestrial water storage variations from GRACE with groundwater‐level measurements from the High Plains Aquifer (USA)
Comparison of seasonal terrestrial water storage variations from GRACE with groundwater‐level measurements from the High Plains Aquifer (USA)
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DOI：
10.1029/2007gl030139
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发表时间：
2007-07
影响因子：
5.2
通讯作者：
G. Strassberg;B. Scanlon;M. Rodell
中科院分区：
文献类型：
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作者：
G. Strassberg;B. Scanlon;M. Rodell
本研究首次比较了 GRACE 卫星数据得出的季节性地下水储存 (GWS) 变化与美国高原含水层（450,000 平方公里）的地下水位测量值。季节性 GRACE 陆地水储量 (TWS) 与现场测量（2,700 口井）估算的 GWS 总和以及地表模型模拟的土壤湿度 (SM) 之间的相关性很高 (R = 0.82)。 GRACE 得出的和测量的 GWS 之间的相关性也很显着 (R = 0.58)。 GRACE 衍生的季节性 TWS 和 GWS 变化分别在 9 个监测周期中的 7 个和 5 个周期中可检测到（≥不确定性），而 TWS 和 GWS 的最大变化（冬季/春季和夏季/秋季之间）在所有 5 个监测周期中均可检测到。这些结果显示了 GRACE 监测半干旱地区 GWS 变化的潜力，这些地区的灌溉抽水导致 GWS 发生较大的季节性变化。
This study presents the first comparison of seasonal groundwater storage (GWS) variations derived from GRACE satellite data with groundwater‐level measurements in the High Plains Aquifer, USA (450,000 km2). Correlation between seasonal GRACE terrestrial water storage (TWS) and the sum of GWS estimated from field measurements (2,700 wells) and soil moisture (SM) simulated by a land surface model is high (R = 0.82). Correlation between GRACE‐derived and measured GWS is also significant (R = 0.58). Seasonal GRACE‐derived TWS and GWS changes were detectable (≥ uncertainty) in 7 and 5 out of 9 monitored periods respectively whereas maximum changes (between winter/spring and summer/fall) in TWS and GWS were detectable in all 5 monitored periods. These results show the potential for GRACE to monitor GWS changes in semiarid regions where irrigation pumpage causes large seasonal GWS variations.