长江下游通州沙河段洪枯季水沙特性观测分析  

Measurement and analysis of water and sediment characteristics during flood and dry seasons of Tongzhousha reach of the Yangtze River

作　　者：王钟寅 曹杰 程晨 王元叶 李为华 

机构地区：[1]上海河口海岸科学研究中心河口海岸交通行业重点实验室,上海201201

出　　处：《水运工程》2013年第11期70-75,共6页Port & Waterway Engineering

基　　金：交通运输部科技项目(2011-329-A06-130)

摘　　要：为增进对长江下游通州沙河段暗沙、浅滩滩面水沙特性及近底泥沙运移现状的认识，首次在该河段引入坐底式综合观测系统，通过各型自动水沙观测仪器获取通州沙河段洲滩及主槽的洪枯季近底层水沙运动过程并展开分析。实测数据表明：该河段落潮水动力＞涨潮；涨潮动力深槽≥高滩＞低滩，落潮动力深槽≥低滩＞高滩，大潮＞中潮＞小潮；水流旋转性则表现为低滩＞高滩＞深槽；且水动力与潮差间有较好的线性相关关系，相关系数基本均大于0.9；近底悬沙含沙量表现为落潮＞涨潮，大潮＞中潮＞小潮，深槽＞低滩＞高滩，洪季为枯季的1.5～2倍，该河段枯季期间近底悬沙含沙量与水动力因子v2/（gh）的线性相关系数为0.5左右，洪季在0.6～0.7，据此建立的输沙能力公式可用于该河段浅滩及深槽的近底层悬沙输沙能力推算。It is the first time that the bottom tripod survey system is deployed in Tongzhousha reach of the Yangtze River for the purpose of studying the existing water and sediment characteristics and near bottom sediment transportation conditions during flood and dry seasons of this reach. The field data shows that the distribution of velocity is ebb tide〉flood tide, deep channel≥high shoal〉low shoal during flood tide, deep channel≥low shoal〉high shoal during the ebb tide and spring tide〉middle tide〉neap tide. There is a good linear correlation between the mean velocity of flood or ebb tide and tide range with the correlation coefficient above 0.9. The distribution of SSC near bottom is ebb tide〉flood tide, deep channel〉low shoal〉high shoal and spring tide〉middle tide〉neap tide. SSC during the flood season is about 1~1.5 times bigger than that during the dry season. The correlation coefficient between near bottom SSC and dimensionless coefficient v2/（gh） is about 0.5 during the dry season and about 0.6~0.7 during the flood season, a series of formula based on this correlation can be used to estimate the near bed sediment transport capacity of the Tongzhousha reach.

关 键 词：12 5m深水航道 通州沙河段 洪枯季 水沙特性 

分 类 号：TV148[水利工程—水力学及河流动力学]