珠江磨刀门河口悬沙浓度变化特征分析

发布时间：2018-03-04 12:10

本文选题：磨刀门　切入点：洪枯季　出处：《泥沙研究》2017年04期 　论文类型：期刊论文

【摘要】：根据2011年枯季和2012年洪季在大、中、小潮期间的多点同步现场观测资料,分析研究了磨刀门河口悬沙浓度变化特征。结果表明:磨刀门口悬沙浓度纵向分布呈近岸高,远岸低的趋势;横向分布具有季节性差异,洪季主槽大于滩地,枯季滩地大于主槽;垂向分布洪季主要以斜线型分布为主,枯季主要以抛物线型分布为主。潮周期平均含沙量大潮普遍大于中、小潮;洪、枯季磨刀门口外落潮含沙量普遍大于涨潮含沙量。洪季含沙量混合较为均匀,落潮时含沙量增大,涨潮时含沙量减小,枯季含沙量分层明显,。受波浪潮汐作用,一个周期内有多次明显的再悬浮过程,涨潮时增大,落潮时减小。
[Abstract]:Based on the field observation data of the dry season in 2011 and the flood season in 2012 in the period of large, middle and low tide, the variation characteristics of suspended sediment concentration in the mouth of Modiaomen are analyzed and studied. The results show that the longitudinal distribution of suspended sediment concentration at the entrance of Motabaomen is near shore height. The horizontal distribution has seasonal difference, the main trough is larger than the beach in flood season, the beach is larger than main trough in dry season, and the vertical distribution is mainly inclined distribution in flood season. In dry season, the main distribution is parabola type. The mean sediment content of tidal cycle is generally larger than that of middle tide and low tide, and the sediment content of falling tide is generally larger than that of high tide in dry season, and the mixing of sediment content in flood season is more uniform. The sediment content increases during the falling tide, decreases at the high tide, and is stratified obviously in the dry season. Due to the wave tide, there are many obvious resuspending processes in a period, which increases at the high tide and decreases at the fall tide.
【作者单位】：水利部珠江河口动力学及伴生过程调控重点实验室;珠江水利委员会珠江水利科学研究院;
【基金】：国家自然科学基金项目(51409286) 长江科学院开放研究基金项目(CKWV2017499/KY) 珠科院开放基金项目([2013]KJ05)
【分类号】：TV148.1

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