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[1]QIAO Dianxin,FENG Wei,WANG Fei,et al.Characteristics of Runoff and Sediment Yield of Typhoon ‘Lekima' Rainstorm[J].Research of Soil and Water Conservation,2022,29(02):31-35+42.

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Characteristics of Runoff and Sediment Yield of Typhoon ‘Lekima' Rainstorm

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 02 Page number: 31-35+42 Column: Public date: 2022-03-20

Title:: Characteristics of Runoff and Sediment Yield of Typhoon ‘Lekima' Rainstorm

Author(s):: QIAO Dianxin¹, FENG Wei², WANG Fei^3,4, LI Binbin¹, HAN Jianqiao^3,4, LI Qi¹, WANG Guozhen⁴; (1.Monitoring Center of Soil and Water Conservation, Ministry of Water Resources, Beijing 100053, China; 2.Department of Soil and Water Conservation, Ministry of Water Resources, Beijing 100053, China; 3.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 4.Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China)

Keywords:: ‘Lekima' typhoon; rainstorm; runoff and sediment yield; soil erosion; prediction of sediment discharge

CLC:: P333

DOI:: -

Abstract:: Based on the rainstorm flood event caused by the 9th typhoon ‘Lekima'(2019), we analyzed the characteristics of runoff and sediment yield of two watersheds of different scales in this rainstorm by using hydrological data from Xinzhuang Control Station and Huangshan Hydrological Station in the mainstream of Mihe River in the rainstorm center with the purpose of clarifying the characteristics of runoff and sediment yields in different scale basins under extreme rainstorm and providing technical support for coping with extreme rainstorm events. The result showed that from August 10th to August 17th, 2019, the total flood runoff of Xinzhuang Observation Station was 1.23 million m³, and the measured flood peak was 40.96 m³/s; the total amount of flooded sediment was 4 600 t, and the specific sediment yield was 1 285 t/km²; the measured peak flow at Huangshan Hydrological Station was 2 210 m³/s, which was the maximum flow since the establishment in 1988, and the return period was 33.3 years; the sediment runoff of Huangshan Hydrological Station was 362 300 t, and the sediment transport modulus was 966 t/km²; the sediment runoff caused by this storm and flood was 1.65 times that of the average annual sediment runoff(195 000 t); the correlation between the storm flood and the water-sand relationship curve of the flooding process in the flood season in the summer of 2018 was good. In conclusion, the prediction based on the relationship between water and sediment is accurate, indicating that it is feasible to use the relationship between historical flood and sediment to predict the sediment transport during extreme rainstorm.

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Last Update: 2022-04-20