NIE Ning, ZHANG Wanchang, CHEN Hao, ZHAO Dengzhong, LIU Min. Temporal variation characteristics and attribution analysis of terrestrial water storage change in the Yangtze River basin[J]. Advances in Water Science, 2021, 32(3): 396-407. DOI: 10.14042/j.cnki.32.1309.2021.03.008
Citation: NIE Ning, ZHANG Wanchang, CHEN Hao, ZHAO Dengzhong, LIU Min. Temporal variation characteristics and attribution analysis of terrestrial water storage change in the Yangtze River basin[J]. Advances in Water Science, 2021, 32(3): 396-407. DOI: 10.14042/j.cnki.32.1309.2021.03.008

Temporal variation characteristics and attribution analysis of terrestrial water storage change in the Yangtze River basin

  • We explored the temporal variation and attribution characteristics of terrestrial water storage change (TWSC) in the Yangtze River basin by using Gravity Recovery and Climate Experiment (GRACE) satellite observations and hydrological model simulations and reconstructing and analysing the monthly TWSC over the Yangtze River basin during 1988—2012. Based on the simulation results of 13 scenarios, we quantitatively separated the relative contributions of climate variability and crucial human activities (including land use changes and reservoir operations) to TWSC. The main results were as follows: ① The basin-level averaged TWSC, precipitation, evapotranspiration, and runoff depth showed changing trends at linear rates of 0.1, -3.5, 0.6, and-4.2 mm/a, respectively. ② The monthly non-seasonal TWSC was significantly and negatively correlated with the Southern Oscillation Index, with a significance level of α < 0.01. ③ Climate variability played a leading role in the TWSC variations, and the contribution rates of reservoir operations to the monthly mean TWSC were negatively correlated with those of climate variability, and lastly. ④ Following the construction of the Three Gorges Reservoir, the influence of reservoir regulation on the monthly mean TWSC was significantly enhanced; it presented seasonal variations in which TWSC was reduced by reservoir operations during January—May and enhanced during July—December. This study developed a useful research framework for attribution analyses on TWSC, and the results can provide decision support for water resource planning and management in the Yangtze River basin.
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