[1]LI Xue,YU Kunxia,LI Peng,et al.Spatiotemporal Evolution and Driving Force of Rainfall Concentration in the Yellow River Basin[J].Research of Soil and Water Conservation,2023,30(05):266-273.[doi:10.13869/j.cnki.rswc.2023.05.008.]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 05
Page number:
266-273
Column:
Public date:
2023-08-10
- Title:
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Spatiotemporal Evolution and Driving Force of Rainfall Concentration in the Yellow River Basin
- Author(s):
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LI Xue1, YU Kunxia1, LI Peng1, LI Zhanbin1, YANG Zhi2, ZHANG Guojun2, ZHANG Xiaoming3, MA Wentao2
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(1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi 'an 710048, China; 2.Ningxia Soil and Water Conservation Monitoring Station, Yinchuan 750000, China; 3.Ecological Engineering Research Center for Soil and Water Conservation, Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100000, China)
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- Keywords:
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rainfall concentration; Yellow River Basin; spatiotemporal evolution; driving force; cross wavelets
- CLC:
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TV125
- DOI:
-
10.13869/j.cnki.rswc.2023.05.008.
- Abstract:
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[Objective] Investigating the spatial and temporal evolution of rainfall concentration in the Yellow River Basin and its driving forces can reveal the intra-annual distribution of rainfall in the region and provide a scientific basis for the prevention of extreme rainfall and the control of soil erosion and water resources planning in the basin. [Methods] Theil-Sen Median analysis and Mann-Kendall test were used to investigate the trend characteristics of rainfall concentration in the Yellow River basin based on the month-by-month raster rainfall data from 1961—2018. The influence of the three selected atmospheric anomalous circulation factors and sunspots on rainfall concentration were discussed. [Results](1)The average annual rainfall in the middle and lower reaches of the Yellow River basin was much greater than that in the upper reaches, with the maximum average annual rainfall in the middle and lower reaches of the basin from Sanmenxia to Huankou and below Huankou reaching 867 mm, while the average annual rainfall in the upper reaches of the Yellow River from Lanzhou to the northern part of Hekou town was only 115 mm.(2)The rainfall concentration in the Yellow River Basin varied greatly from watershed to watershed, with significant seasonal variations in the watershed from Longmen to Sanmenxia, and abnormal concentrations in the northeastern part of the watershed from Lanzhou to Hekou town.(3)Areas with significant trends in rainfall concentration in the Yellow River basin mainly concentrated above Longyangxia, from Longyangxia to Lanzhou and from Lanzhou to Hekou town.(4)Both sunspots and atmospheric circulation anomalies had influence on rainfall concentration, with atmospheric circulation anomalies directly influencing rainfall concentration and sunspots indirectly influencing rainfall concentration through atmospheric circulation anomalies. This study investigated the rainfall concentration in the Yellow River Basin, which could provide a scientific basis for the prevention of extreme rainfall and the control of soil erosion and water resources planning in the Yellow River Basin. [Conclusion] The concentration of rainfall in different water resource zones in the Yellow River Basin varied greatly. When formulating erosion control measures and water resource planning policies, it is necessary to tailor them to the actual rainfall conditions in different water resource zones.