刘〓云,王〓斌,王月华.鳌江中游河段含沙量及回淤分析[J].水电能源科学,2018,36(10):144-146
鳌江中游河段含沙量及回淤分析
Analysis of Sediment Concentration and Sand Silt in the Middle Reaches of Aojiang River
  
DOI:
中文关键词:  感潮河道  含沙量  回淤  淤积速度
英文关键词:tidal river  sediment concentration  sand silt  siltation rate
基金项目:浙江省科技计划项目(2017F30013)
作者单位
刘〓云,王〓斌,王月华 浙江省水利河口研究院 浙江省河口海岸重点实验室 浙江 杭州 310020 
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中文摘要:
      感潮河道受上游来水来沙及下游潮汐的作用,水沙动力条件和河床演变复杂。为研究鳌江中游河段河道拓宽疏浚后泥沙淤积情况,以实测水文泥沙资料为基础,采用平面二维水流数学模型进行计算分析,鳌江中游河段显桥处含沙量与鳌江河口潮差呈指数相关关系,相关系数均在0.85以上;根据涨落潮量变化结合相关关系计算所得含沙量进行估算,河道拓宽疏浚至120 m后,初始状态下游中潮时显桥—水头每潮淤积量为1 400 m3;假定在一年中连续1、2、3个月的枯水流量下,最大淤积量分别为4×104、10×104、12×104m3。表明泥沙淤积总量在前2个月快速增长,第3个月淤积速度减慢。
英文摘要:
      Tidal river is under the action of the inflow and sediment as well as the lower tide. Therefore, the hydrodynamic condition and river bed process become complicated. Based on field hydrological and sediment data, two dimensional flow mathematical model was used to study the sand silt in the middle reaches of Aojiang river after widen and dredging. There is a exponential correlation between the sediment concentration of Xianqiao in the middle reaches of Aojiang river and tidal range of Aojiang estuary, and the correlation coefficient is above 0.85. According to the variation of flood and ebb tide and sediment concentration calculated by fitting formulas, after widen and dredging to 120 m, the siltation volume between Xianqiao and Shuitou is 1 400 m3 in a moderate tidal cycle under the initial state. The maximum siltation volume is about 4×104m3 , 10×104m3 and 12×104m3 under one month, two months and three months of low water. It shows that siltation volume increases quickly in the first two months, and the siltation rate slows down in the third month.
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