基于GRACE数据的2002-2016年长江流域陆地水储量变化分析  

Analysis of Land Water Storage Changes in Yangtze River Basin From 2002 to 2016 Based on GRACE Data

作　　者：邱良传 孟昭睿 QIU Liang-chuan;MENG Zhao-rui(Basic Geological Survey Institute of Jiangxi Geological Survey and Exploration Institute,Nanchang Jiangxi 330030,China;Jiangxi Nonferrous Geological Mineral Exploration and Development Institute,Nanchang Jiangxi 330030,China)

机构地区：[1]江西省地质调查勘查院基础地质调查所,江西南昌330030 [2]江西有色地质矿产勘查开发院,江西南昌330030

出　　处：《地矿测绘》2024年第4期7-12,共6页Surveying and Mapping of Geology and Mineral Resources

摘　　要：GRACE技术已广泛用于陆地水储量变化研究,对于探测区域水量平衡关键参数具有重要的使用价值和研究意义。基于2002/04-2016/06共158期GRACE RL05月重力场模型,首先分析了不同滤波算法对南北条带误差的削弱作用,并探讨了Mascon和尺度因子等恢复GRACE数据信号泄露的方法,从而获取了长江流域的长期陆地水储量变化时间序列。实验结果表明:长江流域水储量长期呈上涨趋势,然而各支流呈现出明显的空间异质性,即上游为持续上涨、中下游为先下降后上涨。分别利用3种GRACE数据分析了长江流域水储量变化,联合气象站实测数据验证长江流域水储量与降水减去蒸发高度相关,并说明了Mascon和尺度因子法可以一定程度恢复GRACE数据。初步分析了三峡水库的两次蓄水对库区水储量变化的影响,然而由于GRACE数据空间分辨率低,难以与DEM模拟的库区容量取得完全一致的结果。GRACE technology has been widely used in the study of changes in land water reserves,and has important practical value and research significance for detecting key parameters of regional water balance.This article was based on a total of 158 GRACE RL05 gravity field models during April 2002 and June 2016.Firstly,it analyzed the weakening effect of different filtering algorithms on the north-south strip error,and explored methods such as Mascon and scale factor to restore GRACE data signal leakage,thus obtaining the long-term time series of land water storage changes in the Yangtze River Basin.The experimental results showed that the water reserves in the Yangtze River Basin have been on an upward trend for a long time,but each tributary exhibits significant spatial heterogeneity,namely,the upstream continues to rise,while the middle and lower reaches first decline and then rise.Three types of GRACE data were used to analyze the changes in water storage in the Yangtze River Basin,and the correlation between water storage and precipitation minus evaporation height was verified by combining the measured data from meteorological stations.It was also demonstrated that Mascon and scale factor methods can restore GRACE data to a certain extent.A preliminary analysis was conducted on the impact of the two water storage events in the Three Gorges Reservoir on the changes in water storage in the reservoir area.However,due to the low spatial resolution of GRACE data,it is difficult to obtain completely consistent results with the reservoir capacity simulated by DEM.

关 键 词：卫星时变重力场探测技术 长江流域 水平衡 陆地水储量 等效水高 

分 类 号：P223[天文地球—大地测量学与测量工程]