| 摘要: |
| 基于GRACE RL06 Level-2卫星产品数据，采用高斯滤波、P3M9去相关滤波等方法对2002年4月-2017年6月长江流域地表水储量变化进行了反演。结果表明：近16年来，长江流域整体水储量处在一个缓慢上升的状态，地表水储量变化速率为4.1±1.1 mm/yr，总体水量在这一期间增加了大约1.1×1011T，基于水文要素的统计分析显示这一结果较为准确的反映了长江流域的水量收支状态。 |
| 关键词: GRACE；地表水储量；长江流域 |
| DOI： |
| 投稿时间：2020-12-28修订日期：2021-06-04 |
| 基金项目:重庆市自然科学基金面上项目(cstc2020jcyj-msxmX1009):多源遥感协同的西南地区土壤水分时空变化监测研究；重庆市自然科学基金面上项目(cstc2020jcyj-msxmX1026):基于北斗系统的重庆市土壤湿度监测关键技术研究. |
|
| Changes of Terrestrial Water Storage in the Yangtze River Basin Based on GRACE Data |
| Ye Qinyu,Zhang Qiang,Li Xiaolong |
| (Chongqing Institute of Meteorological Sciences;Chongqing Meteorological Service;School of Geodesy and Geomatics, Wuhan University,) |
| Abstract: |
| Based on GRACE RL06 Level-2 satellite product data, Gaussian filtering and P3M9 decorrelation filtering method were used to invert the surface water storage changes in the Yangtze River basin from April 2002 to June 2017. The results show that, in recent 16 years, the overall water storage of the Yangtze River Basin has been in a state of slowly increase, the change rate of surface water storage is 4.1±1.1 mm/yr, and the total water volume storage of the Yangtze River Basin has increased by 1.1×1011T during this period. The statistical analysis based on hydrological elements shows that this result accurately reflects the water budget state of the Yangtze River Basin. |
| Key words: blizzard disaster; rain to snow; mesoscale system; mesoscale inversion |
