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ESTIMATING GROUNDWATER STORAGE CHANGES IN THE WESTERNKANSAS USING GRACE DATA

机译:使用Grace数据估算西方的地下水储存变化

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The Gravity Recovery and Climate Experiment (GRACE) delivers monthly gravity fields since it was launched in March 2002, which provides a new way to monitor the groundwater storage variations for large regions. In this study, we attempt to apply the GRACE data combined with estimated soil moisture based on the water balance approach to estimate monthly groundwater changes in the western Kansas of approximately 100,000 km~2. The comparison of different Gaussian smoothing radiuses indicated that a smaller filter radius (150 km) is more appropriate for this size of the study area to get more effective gravity signals. The results are compared with in situ yearly measurements of groundwater levels and show a prominent seasonal cycle. The groundwater storage changes estimated from GRACE data agree well with the measured groundwater levels during 2003 and 2008. Both of them show a decline trend. Such observation results from GRACE data will provide regional fundamental information for water resource management.
机译:重力恢复和气候实验(Grace)以2002年3月推出以来,可提供每月重力领域,该领域提供了一种新的途径来监控大区域的地下水储存变化。在这项研究中,我们试图将宽限数据与估计的土壤水分相结合,基于水平衡方法来估计西堪萨斯西部堪萨斯大约100,000公里〜2的月度地下水变化。不同高斯平滑半径的比较表明,较小的过滤器半径(150 km)更适合于该研究区域的这种尺寸以获得更有效的重力信号。将结果与地下水位的原位测量进行比较并显示出突出的季节性周期。从宽限数据估计的地下水储存变化与2003年和2008年的测量地下水位达成了良好。两者都表现出下降趋势。宽限数据的这种观察结果将为水资源管理提供区域基本信息。

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