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淤泥质浅滩航道疏浚过程中水流输运能力变化分析

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射阳港位于苏北淤泥质浅滩,水深条件相对较差,航道回淤强度大.构建了二维潮流数学模型,研究航道自现状疏浚至设计底高程的水流输运能力的过程变化.结果表明,随着航道的浚深,航道内水流流速整体呈减小趋势,航道流速减少程度与航道浚深幅度呈正比,涨急流速最大减少 43.4%~61.7%,落急流速最大减少 39.8%~58.5%.航道浚深至6.5 m时,航道落潮水流输运能力减小幅度达 40%~80%;航道浚深至 10.5 m时,航道落潮水流输运能力减少 80%~95%,航道涨潮水流输运能力强于落潮的范围相比现状增大约 80%,当周边泥沙进入航道后,不利于泥沙的向外输运.
Changes of water transport capacity during dredging in silty shoal waterway
Sheyang Port is located in the silty shoal in northern Jiangsu,with relatively poor water depth condition and strong silting intensity.In this paper,a two-dimensional tidal flow mathematical model is constructed to study the process of water transport capacity from the current situation to dredging to the design of the bottom elevation.The results show that with the waterway dredging deepen,the overall water velocity in the waterway shows a decreasing trend.The degree of decrease of water velocity is proportional to the dredging depth of the waterway.The maximum decrease of the rising jet is 43.4%~61.7%,and the maximum decrease of the falling jet is 39.8%~58.5%.When the dredging depth of the waterway is 6.5 m,the transport capacity of the waterway falling tide decreases by 40%~80%.When the dredging depth of the waterway is 10.5 m,the transport capacity of the waterway falling tide decreases by 80%~95%.The transport capacity of the waterway rising tide is stronger than that of the falling tide,which increases by about 80%compared with the current situation.When the surrounding sediment entered the waterway,it is not conducive to the outward transport of sediment.

Sheyang Portwaterway dredgingnumerical simulationwater transportsediment carrying capacity

孟江山

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中交广州航道局有限公司,广东 广州 510289

射阳港 航道疏浚 数值模拟 水流输运 挟沙能力

2024

水运工程
中交水运规划设计院有限公司

水运工程

CSTPCD
影响因子:0.428
ISSN:1002-4972
年,卷(期):2024.(10)
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