2005-2020年中国GRACE/GFO地下水储量变化数据集
收藏资源简介:
本数据产品定义的地下水储量变化是指地下水储量相对多年(2005-2020)月平均值的相对变化量,以等效水高表示(单位:mm)。数据产品融合实测水位、水文模型与卫星重力数据,开展协同正演模拟,降低网格尺度上的重力卫星信号泄露误差,通过迭代优化影响地下水储量变化的关键变量含水层储水系数,最终实现地下水储量变化反演。
The groundwater storage change defined in this data product refers to the relative deviation of groundwater storage from the multi-year (2005–2020) monthly mean values, expressed as equivalent water height with the unit of mm. This data product integrates in-situ water level measurements, hydrological models and satellite gravity data to conduct collaborative forward modeling, thereby reducing gravity satellite signal leakage errors at the grid scale. It iteratively optimizes the aquifer storage coefficient, a key variable influencing groundwater storage change, and finally achieves the inversion of groundwater storage change.




