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悬沙

悬沙的相关文献在1982年到2022年内共计189篇,主要集中在水利工程、海洋学、地球物理学 等领域,其中期刊论文135篇、会议论文4篇、专利文献30870篇;相关期刊65种,包括海洋科学、海洋通报、中国水产科学等; 相关会议4种,包括第六届全国泥沙基本理论研究学术讨论会、第五届全国水动力学学术会议暨第十五届全国水动力学研讨会、第十六届中国海洋(岸)工程学术讨论会等;悬沙的相关文献由456位作者贡献,包括沈盎绿、何青、李九发等。

悬沙—发文量

期刊论文>

论文:135 占比:0.44%

会议论文>

论文:4 占比:0.01%

专利文献>

论文:30870 占比:99.55%

总计:31009篇

悬沙—发文趋势图

悬沙

-研究学者

  • 沈盎绿
  • 何青
  • 李九发
  • 黄惠明
  • 张存勇
  • 徐兆礼
  • 王元叶
  • 程晨
  • 车越
  • 于连生
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 吴文娟; 李勇
    • 摘要: 黄河口悬沙分布规律研究是关系河口海岸地貌演变、水体水生态研究的重要课题。通过实测资料,发现大部分泥沙在10m水深节点近岸侧落淤,且相同量级的泥沙浓度沿莱州湾西岸带呈弧形分布。利用泥沙反演模型,结合来水来沙、潮汐潮流资料,得出以2000年为界,口门沙嘴前方悬沙浓度呈明显减小趋势。强径流更容易将泥沙输送至外海海域,汛期发生的出汊摆动直接影响着悬沙的扩散运移方向。研究成果可为河口海岸地貌演变、水体水生态研究提供资料支撑。
    • 晏彪; 袁震洲; 李厚贵; 朱俊
    • 摘要: 通过布设的悬沙采集站点获取的120个悬沙粒度样品,对江苏射阳南区海域的海洋悬沙类型、粒级组成、含量及平均粒径、分选系数、偏差、峰态、中值等粒度参数进行了统计分析,揭示了悬沙在冬、夏季大、中、小潮期间不同的特性,分析结果对工程设计和施工具有重要的指导意义.
    • 董超; 陈俊兵; 谢永清; 王建强; 陈选博
    • 摘要: 通过对舟山沈家门海域水文泥沙观测站位数据进行处理和分析,探讨了区域悬沙浓度时空分布及影响因素;对各站位单宽净输沙量和输运方向进行了计算,揭示了海域悬沙输运机制。结果表明:受长江、钱塘江等大河泥沙注入和周边岛屿物质输入影响,海域悬沙浓度较高;平面分布上,悬沙浓度有从东北向西南减小趋势,位于莲花洋的C1站位浓度最大,峙头洋C4站位悬沙浓度较小;悬沙浓度垂向上随水深的增加,逐渐升高;在涨、落潮流的影响下悬沙起动、悬扬、沉降、落淤,浓度随潮流流速变化具较高的相关性;通量机制分解计算表明海域悬沙输运以平流输沙项为主导,单宽净输运率大潮期大于小潮期;总体上,泥沙输运有沿水道走向离岸向海运动趋势。
    • 吉飞; 李志伟; 赵汗青
    • 摘要: 为了研究水动力作用下泥沙对磷的吸附规律,在加长型环形水槽中进行不同流速、初始磷质量浓度及含沙量条件下泥沙对磷的吸附以及磷在水深方向的分布规律试验.结果表明,加长型环形水槽内试验段流速的垂向分布满足对数规律.溶解性活性磷酸盐质量浓度在水深方向非均匀分布,中部水深处磷质量浓度达到最大值.流速影响下的吸附规律取决于水相磷质量浓度:磷质量浓度较低时,流速越大对应的单位泥沙吸附量越小;磷质量浓度较高时,流速越大对应的吸附量就越大.泥沙质量浓度越小,初始磷质量浓度越大,单位质量泥沙对磷的吸附量越大.一阶、二阶动力学方程能够更好地表征淮河泥沙的吸附行为.伴随着泥沙沉降,水体磷质量浓度先增大、后降低,且在沉降0.25h达到最大值.%In order to investigate the patterns of adsorption of phosphorus by sediment under different hydrodynamic actions,the adsorption of phosphorus and the vertical distribution of phosphorus were investigated through experiments in an elongated annular flume.The effects of velocity,initial phosphorus concentration,and sediment concentration were investigated.The results show that the vertical distribution of velocity in the elongated annular flume matched the logarithm law.The concentration of soluble reactive phosphate was distributed unevenly along the depth,and the maximum value appeared in the middle of the depth.The adsorption pattern of phosphorus under different velocity conditions depends on the mass concentration of soluble phosphorus.The amount of adsorption per unit mass of sediment decreased as the velocity increased when the phosphorus concentration was low,while it increased when the phosphorus concentration was high.The adsorption amount of phosphorus per unit mass of sediment increased as the sediment concentration decreased or the initial phosphorus concentration increased.The first-order and second-order dynamic equations can be used to describe the adsorption behavior of sediment in the Huaihe River.With the deposition of suspended sediment,the phosphorus concentration increased to a maximum at 0.25 h and then decreased.
    • 李谊纯; 刘金贵
    • 摘要: 灌河是江苏省北部目前唯一没有在干流建闸的入海河流,拥有广阔的滩涂和优良的航运条件.河口通量是河口治理和河口环境保护中的关键要素.为研究灌河口的盐及悬沙的输运,基于实测资料利用通量分解方法对灌河的盐及悬沙通量的空间分布、大-小潮与潮内的时间变化特征进行了探讨.研究认为:在口门以内的弯曲河段,盐通量在凸岸浅水区一般指向下游,在凹岸深槽处则指向上游.大、小潮期间悬沙通量则基本上为左侧指向上游、右侧指向下游;口外盐通量方向为NNE-NE,而且随径流量大小而稍有改变,口外悬沙通量方向在远岸区域表现为WNW-NNE,近岸G2测点的悬沙通量则指向口门;口门内外盐和悬沙通量的组成均基本以T1、T2和T4为主导,通量组成的总体特征在大、小潮期间基本类似.涨落潮流速最大时刻的悬沙通量不一定与流速方向一致,最大落潮流速时刻由于悬沙浓度可能小于平均值而导致悬沙净输运指向上游.
    • 朱文武; 李九发; 姚弘毅; 张晓鹤
    • 摘要: Based on the field observations in April 2012 in the North Passage of the Changjiang Estuary ,as well as the data measured with scanning electron microscope ,the characteristics of flow and sediment ,the micromorphology and size of floccules and the main influence factors in the North Passage were investigated in this paper .The re‐sults show that the tidal current velocity ,the salinity ,the suspended sediment concentration and the sediment parti‐cle size in the North Passage are very suitable for flocculation .There are varied forms of floccules ,mainly including loose floccules ,porous floccules and dense floccules .They are mainly composed of fine silts and clays ,with rough surfaces ,loose or dense structures .The variations of floccule size are highly related to the flood -ebb process , showing periodic features .The floccule size is big during slacks ,but small during peak currents .Usually ,the floc‐cule size during high water slacks is bigger than that during low water slacks;the floccule size during neap tides is bigger than that during spring tides .Additionally ,the floccule size is gradually increased from the surface to the bottom .The tidal current velocity controls the variations of floccule size .The flocculation of suspended sediment is one of the main reasons for the siltation in the navigation channel of North Passage .%利用多种先进室内外测量仪器进行河口现场观测和室内电镜扫描获得相关资料,对长江河口北槽河道细颗粒泥沙絮凝的水沙环境、絮团的微观形态结构、絮团的粒径组成及其主要影响因素进行了综合分析和讨论。结果表明,北槽河道具有非常适宜细颗粒泥沙絮凝的潮流、盐度、含沙量和悬沙颗粒粒径等基本环境条件。北槽河道悬沙絮团形态多样,主要包括松散状絮团、蜂窝状絮团和密实状絮团。絮团主要由细粉砂和黏土类细颗粒泥沙组成,表面多粗糙不平,结构或密或疏。絮团粒径变化与潮周期动力过程密切相关,具有周期性变化特征。涨、落憩时絮团粒径较大,涨、落急时絮团粒径较小。絮团粒径涨憩大于落憩,小潮大于大潮。垂向上,絮团粒径由表层至底层逐渐增大。周期性潮流流速对北槽河道悬沙絮团粒径变化起到了控制作用。北槽细颗粒泥沙絮凝作用,是导致疏浚航道发生回淤的主要原因之一。
    • 黄积文; 朱首贤; 张文静; 曾文华
    • 摘要: 波浪漫滩是海滩上水陆分界线随波峰向岸推进,随波谷向海回退的现象,它是近年来海岸水沙运动研究的前沿科学问题,其水沙运动观测分析更是需要优先研究的课题。选择海口湾假日海滩,在2013年11月下旬进行了波浪漫滩区及其邻近水域悬沙观测,观测结果表明:①在进行漫滩流速分析时,分别对上爬和回退的平均速度进行统计,两个坡度下上爬速度大于回退速度分别占80%和65%,说明波浪漫滩过程上爬速度通常要大于回退速度;②波浪漫滩区比邻近水域的平均含沙量高1000倍左右;③波浪漫滩区内从海向岸的悬沙浓度逐渐降低,下界(靠海侧)、中间位置、上界(靠岸侧)的平均悬沙浓度分别为67059.6 mg/L、50290.9 mg/L、15762.0 mg/L;④波浪漫滩区悬沙浓度变化随机性强,对其测量和特征分析提出了更高的要求。%Swash is the phenomena that the waves move the instantaneous shoreline back and forth, which is the key problem of the coastal dynamical and sediment research in the recent years. The priority research of swash should be put in the observation of dynamics and sediment. The observation of suspended sediment in the swash zone and its adjacent area of Haikou Bay was done in November 2013. The results show some conclusions. Firstly, the analysis of velocities in the swash zone with two slopes show, the average velovities of swash rundown which are bigger than the velocities of swash runup account for the number of twenty percent and thirty-five percent percent of the total groups respectively,the velocities of swash runup are more often big than the velocities of swash rundown in the swash zone. Secondly, the average suspended sediment concentration in the swash zone is about 1 000 times higher than that in its adjacent area. Thirdly, the suspended sediment concentration in the swash zone gradually re-duces from the sea to the shore, it is 67 059. 6 mg/L in the lower ( near the sea) of the swash zone, 50 290. 9 mg/L in the middle of the swash zone and 15 762. 0 mg/L in the upper ( near the shore ) of the swash zone. Fourthly the variation of suspended sediment concentration in the swash zone is in strong randomness, which brings strict requirement on the further suspended sediment observation in the swash zone.
    • 林益帆; 戴志军; 李为华; 谢华亮; 李九发
    • 摘要: The water and sediment change of the bifurcation mouth is one of the key parts to influence the estuarine delta formation ,w hich is a determinative controlled factor on the stability of the dow nstream river situations . Here ,based on the flood season water and sediment data observed synchronously in the bifurcation mouth between North and South Passage (BMNSP) during the operations of the second and third phases of the Deep Water Chan‐nel Project (DWCP) in the Yangtze Estuary ,impacts of DWCP on hydrodynamics and sediment dynamics of the BMNSP were discussed .The results can be summarized as follows:(1) There had been almost no changes for the situation of both the ebb flow and ebb sediment dominance located at the BMNSP ,even though the operations of DWCP had experienced time span from the second to the post‐third phase .However ,the coefficients of both the ebb flow and ebb sediment dominance of the upstream mouth in the South Passage showed an obvious change from low values in the second DWCP to high values in the third DWCP during the flood season .The corresponding co‐efficients of both the ebb flow and ebb sediment dominance in the North Passage showed inverse changes comparing with those in the South Passage .(2) The Euler residual flow in the flood season could directly determine the flow transport of the BMNSP .During the second and third phase of the DWCP ,average transport discharge of the BMNSP was enhanced except the upstream of the North Passage where the average transport discharge still re‐mained low .The change of the Lagrange residual flow of the BMNSP was similar to that of the Euler residual flow .However ,the Stokes residual flow of the BMNSP has remained minor changes .(3) Due to the decreased ebb current velocities ,increased suspended sediment concentrations ,decreased flow transportation and weaken sediment transport rate of the upstream mouth of the North Passage from the second to the post‐third DWCP ,it could be the main reasons to induce the aggravation of accretions in the upstream mouth of the North Passage .%河口分流口的水沙变化过程是影响河口三角洲发育的核心环节,对下游河势的稳定起着关键性的作用。本文通过对北槽二、三期工程前后的南北槽分流口河段洪季大潮期间的同步水沙观测数据进行分析,以探讨长江口深水航道工程整治对分流口水沙过程的影响。结果表明:(1)北槽二期工程到三期工程后,分流口洪季以落潮优势流、优势沙为主的格局基本没有发生改变,但南槽优势流、优势沙出现略有变大,而北槽略有变小现象;(2)分流口洪季的水体输移主要受控于欧拉余流的变化,除北槽入口段水体净输移量一直较小外,其他河段在二、三期工程实施期间均有大幅提升,其中斯托克斯余流变化不大,拉格朗日余流与欧拉余流变化相一致,南槽呈波动状上升,北槽先增后减;(3)在二期到三期工程期间,北槽分流比明显减小,入口段落潮流速减小,含沙量较高,水体输移量降低,输沙强度减弱,由此导致二期工程以来北槽入口河段淤积强度加重。
    • 李谊纯
    • 摘要: 通过理想模型的解析解对河口悬移质泥沙输沙中恢复饱和过程与潮流不对称耦合作用下的长期净输运机制进行了研究,并给出了二者耦合作用下的悬沙长期净输运的定量表达及悬沙净输运方向与分潮相对位相的关系。研究认为,悬沙的长期净输运与泥沙的恢复饱和过程及潮流不对称存在密切关系。对于仅单频潮波作用的情况,恢复饱和过程不会导致悬沙净输运的产生;分潮与余流的相互作用将产生与余流方向一致的净输运;悬沙的净输运方向与潮流不对称的方向并不完全一致;对于频率满足一定条件的分潮的组合,不论该分潮组合是否导致潮流不对称,均会产生悬沙的净输运;净输运量是分潮组合中各分潮流速的振幅、相对位相及相对恢复饱和时间的函数。对于某一分潮组合,悬沙净输运与潮流不对称方向改变时,二者的相对位相阈值之间的偏差随恢复饱和时间的增大而增大。
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