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Numerical Simulation Study of Flash Flood Disaster Processes in Small Watersheds in Ungauged Areas
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Fu-gang XU1, 2, Jia-xin ZENG1, Wen-long HU1, Qian-you ZHONG1, Xiao-hua XU2
Water Resources and Power | 2023, 41(4) : 92 - 96
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Water Resources and Power | 2023, 41(4): 92-96
• HYDROLOGICAL FORECAST AND OPTIMAL SCHEDULING •
Numerical Simulation Study of Flash Flood Disaster Processes in Small Watersheds in Ungauged Areas
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Fu-gang XU1, 2, Jia-xin ZENG1, Wen-long HU1, Qian-you ZHONG1, Xiao-hua XU2
Affiliations
  • 1.School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China
  • 2.Jiangxi Province Institute of Water Conservancy and Science, Nanchang 330029, China
Published: 2023-04-25 doi: 10.20040/j.cnki.1000-7709.2023.20221113
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In order to reveal the process and mechanism of outbreak of flash floods and causing disasters in ungauged areas, a numerical model of the transport of loose bodies under heavy rainfall floods was established in the Xiangxi River subbasin of Zhangshu City, Jiangxi Province. The process of heavy rainfall and the law of sediment transport were analyzed. The results show that for the river, the flow velocity is higher at the high terrain, slope drop change and the confluence area, and for the area with gentle slope and large catchment area, the increase of flow velocity at the confluence point is especially significant compared with other areas; The local water accumulation at the beginning of the basin, surface runoff occurs in a short period of time, and the gathered water scours out several gullies, and sediment is mostly deposited at the downstream outlet; The water depth and flow velocity of the basin are related to the rainfall. The greater the rainfall, the greater the water depth and flow velocity is, the more significant the scouring situation is. This study has positive significance for flash flood warning in the region.

ungauged areas  /  small watersheds  /  flash floods  /  sediment transport  /  numerical simulation
Fu-gang XU, Jia-xin ZENG, Wen-long HU, Qian-you ZHONG, Xiao-hua XU. Numerical Simulation Study of Flash Flood Disaster Processes in Small Watersheds in Ungauged Areas[J]. Water Resources and Power, 2023 , 41 (4) : 92 -96 . DOI: 10.20040/j.cnki.1000-7709.2023.20221113
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Year 2023 volume 41 Issue 4
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20221113
  • Receive Date：2022-05-25
  • Online Date：2026-01-27
  • Published：2023-04-25
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History
  • Received：2022-05-25
  • Revised：2022-07-30
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Affiliations
    1.School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China
    2.Jiangxi Province Institute of Water Conservancy and Science, Nanchang 330029, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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