A Comparative Study on Calculating Water Storage Change of River Basin Based on Two Methods

Abstract:

Water scarcity is a critical issue in most regions of China; however, river basin groundwater monitoring is extremely limited.This study evaluates the ability of the GRACE satellites and Global Land Data Assimilation System(GLDAS) to monitor groundwater storage in the Yellow River Basin and Yangtze River Basin, China, which is subjected to intense irrigation, production and living. The simulated terrestrial water storage change data which was calculateed by Global Land Data Assimilate System was used to compare the accuracy of GRACE data. Results show that both two datas show significant seasonal cycle in the Yangtze River and Yellow River (except frozen soil), the correlation is 0.89 and 0.84(p<0.05).Two methods have some differences on grid scales, the results which was retrieved by GRACE satellites have better continuity than simulated by GLDAS. GRACE inversion results reflect deeper water storge change in soil, and GLDAS simply reflect surface soil moisture.

• Periodical: Advanced Materials Research (Volumes 1030-1032)
• Pages: 465-471
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.465
• Online since: September 2014
• Authors: Min Xu, Jian Wang, Qiu Dong Zhao
• Keywords: Comparative, Global Land Data Assimilation System, GRACE Satellites, River Basin, Water Storage Change

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