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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。
Based on the multi-point synchronization observation data during the flood season in the dry seasons of 2011 and the flood seasons in 2012, the characteristics of suspended sediment concentrations at the Modaomen estuary were analyzed. The results showed that the longitudinal distribution of suspended sediment concentration in Shaodongmen had a tendency of high in nearshore and low in distant shore. The seasonal distribution of lateral suspended sediment had a seasonal difference. The main trough of flood season was larger than that of beach land, Slash-based distribution, mainly in dry season parabolic distribution. The tide of the average sediment concentration in the tidal cycle is generally greater than that in the middle and small tide. During the flood season, the sediment concentration was more uniform, the sediment concentration increased at low tide, the sediment concentration decreased at high tide, and the sediment concentration in dry season was obviously stratified. Due to wave tide, there are many obvious resuspension processes in one cycle, which increase when the tide is high and decrease when the tide is low.