人民长江Issue(16)：1-4,9,5.DOI:10.16232/j.cnki.1001-4179.2015.16.001
利用GRACE时变重力场探测长江流域水储量变化
Estimation of terrestrial water storage changes of Yangtze River Basin by GRACE time-variable gravity field
孙丽 1何秀凤 1张永磊1
作者信息
- 1. 河海大学 地球科学与工程学院，江苏 南京210098
- 折叠
摘要
Abstract
The traditional method of detecting TWS( Terrestrial Water Storage) is limited because of the uneven water distribu-tion and incomplete fitting conditions. GRACE ( Gravity Recovery and Climate Experiment) can overcome the above limitations and provide a new method for the detection of TWS change. We use the time-variable gravity field model provided by CSR( Cen-ter for Space Research) to inverse the TWS change in Yangtze River Basin from 2003 to 2013 , supplemented by P4M6 correla-tion filter and Gauss filter;then, the reliability of the results is verified by two hydrological model, GLDAS ( global land data as-similation system) and WGHM( WaterGAP Global Hydrology Model);the tendency analysis of time-variable series of the calcu-lated TWS is studied. The results show that the time-variable gravity detected by GRACE can inverse TWS of Yangtze River Ba-sin accurately;the TWS in the basin increases slowly with annual growth rate of about 0. 6 cm/a;the growth rate of downstream area is greater than that of upstream area of Yangtze River Basin.关键词
GRACE/陆地水储量变化/经验正交函数/长江流域Key words
GRACE/TWS changes/empirical orthogonal function/Yangtze River Basin分类
建筑与水利引用本文复制引用
孙丽,何秀凤,张永磊..利用GRACE时变重力场探测长江流域水储量变化[J].人民长江,2015,(16):1-4,9,5.
