Earth Science Frontiers ›› 2024, Vol. 31 ›› Issue (6): 450-461.DOI: 10.13745/j.esf.sf.2024.5.30

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Simulation and prediction of inland river runoff based on CMIP6 multi-model ensemble

LIANG Wenxiang1,2(), LUO Zhen3, CHEN Fulong1,2,*(), WANG Tongxia1,2, AN Jie1,2, LONG Aihua1,4, HE Chaofei1,2   

  1. 1. School of Hydraulic Engineering, Shihezi University, Shihezi 832000, China
    2. Key Laboratory of Ecological Hydraulic Engineering Corps in Cold and Arid Areas, Shihezi 832000, China
    3. Xinjiang Corps Survey and Design Institute Group Co., Ltd., Xi’an 710000, China
    4. State Key Laboratory of Basin Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
  • Received:2023-12-22 Revised:2024-04-02 Online:2024-11-25 Published:2024-11-25
  • Contact: CHEN Fulong

Abstract:

The runoff series of inland rivers with glacier melt as the main supply source has changed significantly with the influence of global climate change and human activities. Predicting the runoff change of inland river basins under future climate change is of great significance for regional water disaster prevention and rational utilization of water resources. A decomposing, simulation-optimization-reconstruction model was constructed and coupled with eight kinds of GCMs data from the multi-model ensemble Average (MME) to predict and analyze the runoff response characteristics in the Manas River Basin under different climate scenarios from 2024 to 2030. The results show that R2>0.86 and TPE<0.28 in the runoff simulation stage of the Model.VLE Model has the smallest simulation error and the best stability. The runoff simulation effect of GCMs data through spatial downscaling, deviation correction, and Model.VLE Model coupling is the best in the historical period, which can provide reliable results for runoff prediction. Compared with the historical period (2000—2014), the runoff water abundance in the Manas River Basin in the future (2024—2030) has a significant increase trend, and the future annual runoff change is related to the future temperature and precipitation, and there is no significant difference in the future runoff under the three climate scenarios (2024—2030).

Key words: runoff forecast, CMIP6 mode, climate change, Inland river, deviation correction

CLC Number: