Inversion of groundwater reserves changes in Queensland by GRACE
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摘要: 昆士兰州作为澳大利亚的第二大州，开展针对该地区地下水储量变化的监测与分析对当地生态环境与用水管理政策制定具有重要现实意义. 利用德克萨斯大学空间研究中心(CSR)发布的重力反演与气候实验卫星(GRACE)时变重力场模型与全球陆地数据同化系统(GLDAS)地表同化模型，对昆士兰州地下水储量时空变化进行监测分析，并与实测水井数据和全球降水气候学项目(GPCP)降雨资料进行验证分析. 研究结果表明：时间上昆士兰州地下水在2003—2015年约以1.3±0.09 cm/a的速率递增，空间上呈现东增西减的显著空间差异；与GPCP降雨资料对比发现，降雨是影响地下水储量变化的主要因素；与水井实测数据对比发现地下反演结果与水井水位变化趋势基本一致.
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关键词:
- 重力反演与气候实验卫星(GRACE) /
- 时变重力场 /
- 全球陆地数据同化系统(GLDAS) /
- 地下水储量 /
- 正向建模法
Abstract: Queensland is the second largest state in Australia. Monitoring and analysis of changes in groundwater reserves in this region this of great practical significance to the formulation of local ecological environment and water management policies, The time-varying gravity field model from gravity recovery and climate experiment (GRACE) issued by the University of texas center for space research (CSR) and the global land data assimilation system (GLDAS) surface assimilation model are used to monitor and analyze the temporal and spatial changes of groundwater reserves in Queensland, which are then verifled and analyzed with measured well data and global precipitation climatology project (GPCP) rainfall data. The research results show that the groundwater increassd at a rate of 1.3±0.09 cm/a in Queensland was approximately in 2003 to 2015. There is also a significant spatial difference between the east and the west. The comparison with the GPCP rainfall data shows that the rainfall is the main factor affecting the change of groundwater reserves, The comparison with the measured data of the water well reveals that the change trend of the underground inversion result is basically consistent with that of the water level of the well. -
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