[1]Ji Guangxing,Liu Zhipei,Gao Hongkai,et al.Monthly scale actual evaporation simulation and attribution analysis in Gan River Basin from 1961 to 2020[J].Research of Soil and Water Conservation,2025,32(01):195-202.[doi:10.13869/j.cnki.rswc.2025.01.035]
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Monthly scale actual evaporation simulation and attribution analysis in Gan River Basin from 1961 to 2020
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
32
Number of periods:
2025 01
Page number:
195-202
Column:
Public date:
2025-01-10
- Title:
- Monthly scale actual evaporation simulation and attribution analysis in Gan River Basin from 1961 to 2020
- Keywords:
- actual evaporation changes; climate change; human activities; ABCD hydrological model; monthly Budyko model
- CLC:
- P333
- DOI:
- 10.13869/j.cnki.rswc.2025.01.035
- Abstract:
- [Objective]The aims of this study are to investigate the change rule and distribution characteristics of actual evaporation in Ganjiang River Basin on monthly time scale and the contribution of different factors to actual evaporation, and to provide theoretical basis for ecological environmental protection and efficient utilization of water resources. [Methods]Based on the runoff data of Waizhou hydrological station in Gan River Basin from 1961 to 2020, the abrupt year of runoff was determined by Mann-Kendall and Pettitt mutation point test methods. Secondly, for calculating monthly scale actual evaporation data, the ABCD hydrological model was employed to simulate the runoff change process during the base period and the mutation period. Next, the Mann-Kendall test with trend-free pre-whitening(TFPW-MK)was applied to examine the variation trend and intra-annual distribution characteristics of monthly scale actual evaporation. Finally, the monthly scale Budyko model was used to analyze the attribution of monthly scale actual evaporation changes. [Results](1)The mutation year of runoff was 1991.(2)The actual evaporation in February, March, April, June and September showed an upward trend, and the actual evaporation in the remaining months showed a downward trend. Among them, actual evaporation in February and March increased significantly(p<0.05).(3)The actual evaporation in the Gan River Basin showed a single peak distribution, and the actual evaporation reached to the maximum near July.(4)Climate change had led to an increase in monthly scale actual evaporation. Human activities had led to a decrease in monthly scale actual evaporation. [Conclusion]The actual evapotranspiration in the Ganjiang River Basin showed a trend of increasing and then decreasing, and the contribution of climate change to the actual evapotranspiration showed a positive effect. The contribution of climate change to actual evapotranspiration was positive, while the contribution of human activities to actual evapotranspiration was negative.
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Last Update:
2025-01-10