摘要
以2013年7月黄河调水调沙期间三角洲近岸底质与同步悬沙资料为依据,探讨三角洲沿岸沉积物和悬沙的分布特征及其冲淤指示意义。研究表明,研究区底质和悬沙都由砂、粉砂和黏土3种组分组成,悬沙中的粉砂和黏土含量较底质高,而砂组分反之;悬沙与底质组分的差值可作为岸滩冲淤的判据;按Shepard分类,黄河三角洲近岸共有6种沉积物类型,通过现行河口与老河口的沉积类型比较显示,砂、粉砂质砂和砂质粉砂属侵蚀性沉积物类型;砂-粉砂-黏土、粉砂和黏土质粉砂则属淤积性沉积物类型。研究发现,近岸沉积物蕴含多种信息,主要反映在颗粒级配频率曲线中,可从曲线的形态类型提取。
Based on 124 samples,data of bed material and suspended load were collected from the Yellow River Delta during the period of water-sediment regulation of the Yellow River in July 2013. Results show that both bed material and suspended load are composed by sand,silt and clay. The proportion of silt and clay are higher in suspended load than in bed material,while the sand component is lower in suspended load than in bed material. The difference of components between bed material and suspended load can be used as a criterion of beach erosion and deposition. According to the Shepard classification,there are 6 deposition types in the Yellow River Delta. Comparison of deposition types in current estuary and old Yellow River estuary showed that sand,silty sand and sandy silt are considered as erosion sedimentary,and sand-silt-clay,silt,clayey silt are deposition sedimentary. Grain size analysis found that bed material carry abundant information and the information is mainly stored in the grain size frequency curve.
出处
《泥沙研究》
CSCD
北大核心
2016年第3期24-30,共7页
Journal of Sediment Research
基金
河口海岸学国家重点实验室自主课题(SKLEC-2012KYYW06)
全球变化研究重大科学研究计划项目(2010CB951202)
山东省自然科学基金青年基金项目(ZR2013DQ025)
关键词
黄河三角洲
沉积物
悬沙
粒度参数
岸滩冲淤
Yellow River Delta
sedimentation
suspended load
grain size parameters
coastal evolution
