基于GRACE重力卫星的珠江流域陆地水储量时空变化研究
Spatiotemporal Changes of Terrestrial Water Storage in the Pearl River Basin Based on GRACE Data
投稿时间:2020-08-11  修订日期:2020-08-11
DOI:
中文关键词:  GRACE  陆地水储量  时空变化  珠江流域
英文关键词:GRACE  Terrestrial Water Storage  Spatiotemporal change  the Pearl River Basin
基金项目:
作者单位邮编
熊景华 华南理工大学土木与交通学院
武汉大学水利水电学院 
510360
王兆礼 华南理工大学土木与交通学院 510360
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中文摘要:
      在气候变化及人类活动日益剧烈的背景下,研究流域陆地水资源变化对理解水文循环过程和管理水资源具有重要意义。本文基于GRACE重力卫星数据研究了珠江流域2002年至2017年陆地水储量异常(TWSA)的时空变化特征。结果表明:1)五套官方GRACE数据在珠江流域的相关性极强,且与GLDAS模拟值及各水文通量变化一致,解算精度较高;2)珠江流域的TWSA呈现了显著的上升趋势,中游和下游北部增长速度最快,达90-120mm/a;3)空间上,各栅格的TWSA均表现出明显的季节性特征,且振幅从南到北、从西到东逐渐下降,除了个别年份,TWSA与实测降雨的空间质心体现了一致的分布和运动特点。GRACE数据在珠江流域体现了很高的适用性。
英文摘要:
      With intensifying climate change and human activities, detecting the spatial and temporal variation of terrestrial water storage in basin scale is of great significance for understanding the hydrological cycle and managing water resources. Based on GRACE data, this paper studies the temporal and spatial change characteristics of terrestrial water storage anomaly (TWSA) in the Pearl River Basin from 2002 to 2017. The results show that: 1) Five GRACE products present strong correlation in the Pearl River Basin, and are consistent with GLDAS-simulated multiply hydrological fluxes with high accuracy; 2) TWSA shows a significant upward trend, the middle reaches and the northern part of the lower reaches have the fastest growth rate of 90-120mm/a; 3) Spatially, TWSA of each grid illustrates obvious seasonal characteristics, and the amplitude gradually decreases from south to north and west to east, respectively. The centroids of TWSA and in-situ rainfall reflect similar spatial distribution and movement characteristics. GRACE data shows high applicability in the Pearl River Basin.
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