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龙港海塘安澜工程(城区段)堤脚冲刷分析
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作者 余朝晖 林忠柱 +4 位作者 张良斌 刘世兴 杨讷 金芝龙 金麒 《珠江水运》 2024年第21期126-128,共3页
感潮河段河床冲淤变化复杂,堤脚冲刷计算对海塘工程设计十分重要。本文通过建立工程所在河段二维水动力泥沙数值模型,计算海塘设防标准相应水文条件下近塘流速、水深参数,并运用堤防冲刷经验公式,计算确定设计水文条件下塘脚冲刷高程。... 感潮河段河床冲淤变化复杂,堤脚冲刷计算对海塘工程设计十分重要。本文通过建立工程所在河段二维水动力泥沙数值模型,计算海塘设防标准相应水文条件下近塘流速、水深参数,并运用堤防冲刷经验公式,计算确定设计水文条件下塘脚冲刷高程。研究结果表明,工程河段地形由洪水造床决定,各特征河段及堤前典型位置,50年一遇洪水作用后滩地冲刷高程均小于100年一遇潮水作用。凹岸段堤前10m处设计冲刷高程分别为-0.5m、-0.2m和-0.1m,堤前30m处设计冲刷高程分别为-8.8m、-8.2m和-3.2m,堤前50m处设计冲刷高程分别为-10.5m、-10.1m和-5.6m;顺直河段堤前10m处滩地冲刷高程基本在0m高程以上,堤前30m处滩地冲刷高程在-6.4~2.0m之间,堤前50m处滩地冲刷高程在-9.6~2.0m之间,需要对进出凹岸的顺直河段加强防冲措施;凸岸段堤前10m、30m处滩地冲刷高程在1.5m以上,堤前50m处滩地冲刷高程最小值为-2.4m。 展开更多
关键词 鳌江 龙港海塘 洪水工况 潮水工程 堤脚冲刷
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Tidal Analysis of High and Low Water Data
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作者 LIPeiliang LILei +2 位作者 ZUOJuncheng ZHAOWei CHENZongyong 《Journal of Ocean University of China》 SCIE CAS 2004年第1期10-16,共7页
The harmonic analysis method based on high and low water levels is discussed in this paper. In order to make full use of the information of high and low water observations (the time derivative of water level at the ob... The harmonic analysis method based on high and low water levels is discussed in this paper. In order to make full use of the information of high and low water observations (the time derivative of water level at the observation time is zero), the weight coefficient, w, is introduced to control the importance of the part related to this information in the error formula. The major diurnal constituents, O 1 and K 1, and semi diurnal constituents, N 2, M 2 and S 2 are selected directly from the monthly data analysis, and some other important constituents, P 1, ν 2 and K 2, are included as the inferred constituents. The obtained harmonic constants of the major constituents are very close to those obtained from the analysis of hourly data, and this shows that high and low water data can be used to extract tidal constants with high accuracy. The analysis result also shows that the inference and the weighting coefficient are important in the high and low water data analysis, and it is suggested that w ≥1 should be taken in monthly high and low water data analysis. This analysis method can be used directly to analyze altimetric data with w =0. 展开更多
关键词 tidal analysis high and low water data altimetric data
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