Acta Geodaetica et Cartographica Sinica ›› 2023, Vol. 52 ›› Issue (5): 714-724.doi: 10.11947/j.AGCS.2023.20210458

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Drought characteristics of the Yellow River basin from 2002 to 2020 revealed by GRACE and GRACE Follow-On data

QU Wei, JIN Zehui, ZHANG Qin, GAO Yuan, ZHANG Pufang   

  1. College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China
  • Received:2021-08-30 Revised:2022-10-20 Published:2023-05-27
  • Supported by:
    The National Natural Science Foundation of China(Nos. 42174006;41731066;42090055);Science Fund for Distinguished Young Scholars of Shaanxi Province(No. 2022JC-18);Fundamental Research Funds for the Central Universities, CHD(Nos. 300102263201;300102262902)

Abstract: The study on the temporal and spatial variation characteristics of drought in the Yellow River basin is of great significance to understand the evolution law of water resources in the Yellow River basin. We make full use of the advantages of GRACE (gravity recovery and climate experiment) and GRACE-FO (GRACE Follow-On)data in monitoring hydrological information changes on a large scale, to calculate the terrestrial water storage anomaly (TWSA) and the corresponding water storage deficit index (WSDI) of the Yellow River basin based on GRACE and GRACE-FO RL06 Mascon data from April 2002 to July 2020.Based on the above analysis revealed by the WSDI, the drought events and their severity, drought duration, average and maximum water reserve deficit in the upper, middle and lower reaches of the Yellow River basin are analyzed. In addition, these analysis are compared with the recognition results of other four commonly drought indexes, standardized precipitation evaporation index (SPEI), self correct-Palmer drought severity index (sc-PDSI), standardized precipitation index (SPI), and standardized runoff index (SRI). The results show that in the five periods of drought events and their corresponding drought grades in the upper reaches, middle and lower reaches of the Yellow River basin identified by WSDI, there are other unidentified phenomena of traditional drought indexes.In the past drought event identification in the Yellow River basin, WSDI shows significant identification advantages over the other four traditional drought indexes. Compared with traditional drought indicators that mainly rely on sparse surface hydrological monitoring information, WSDI drought indicator based on gravity satellite monitoring data can effectively identify the characteristics of watershed drought on a large scale.

Key words: gravity satellite, GRACE, GRACE Follow-On, Yellow River basin, terrestrial water storage anomaly, water storage deficit index, drought index

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