Properties of suspended sediment in the estuarine turbidity maximum of the highly turbid Humber Estuary system, UK

被引:23
|
作者
Uncles, Reginald James [1 ]
Stephens, John Anthony [1 ]
Harris, Carolyn [1 ]
机构
[1] Plymouth Marine Lab, Plymouth PL1 3DH, Devon, England
关键词
Humber estuary; Ouse estuary; sediment transport; estuarine turbidity maximum; suspended sediment; SPM; particle size; floc size; specific surface area; loss on ignition;
D O I
10.1007/s10236-005-0053-y
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Measurements are presented of the properties of suspended particulate matter (SPM) in the estuarine turbidity maximum (ETM) of the upper Humber and Ouse estuaries during transient, relatively low freshwater inflow conditions of September 1995. Very high concentrations of near-bed SPM (more than 100 g l(-1)) were observed in the low-salinity (less than 1), upper reaches. SPM within the ETM consisted largely of fine sediment (silt and clay) that existed as microfloc and macrofloc aggregates and individual particles. Primary sediment particles were very fine grained, and typically, about 20-30% was clay-sized at high water. The clay mineralogy was dominated by chlorite and illite. There was a pronounced increase in particle size in the tidal river, up-estuary of the ETM. The mean specific surface area (SSA) of near-bed SPM within the ETM was 22 m(2) g(-1) on a spring tide and 24 m(2) g(-1) on a neap tide. A tidal cycle of measurements within a near-bed, high concentration SPM layer during a very small neap tide gave a mean SSA of 26 m(2) g(-1). The percentage of silt and clay in surficial bed sediments along the main channel of the estuary varied strongly. The relatively low silt and clay percentage of surficial bed sediments (about 10-35%) within the ETM's region of highest near-bed SPM concentrations and their low SSA values were in marked contrast to the overlying SPM. The loss on ignition (LOI) of near-bed SPM in the turbid reaches of the estuary was about 10%, compared with about 12% for surface SPM and more than 40% in the very low turbidity waters up-estuary of the ETM. Settling velocities of Humber-Ouse SPM, sampled in situ and measured using a settling column, maximized at 1.5 mm s(-1) and exhibited hindered settling at higher SPM concentrations.
引用
收藏
页码:235 / 247
页数:13
相关论文
共 50 条
  • [41] Observations of fine sediment flocculation in the turbidity maximum of the Changjiang Estuary
    Zhu, Wenwu
    Li, Jiufa
    Li, Weihua
    JOURNAL OF SEA RESEARCH, 2022, 179
  • [42] CHEMICAL-COMPOSITION OF SUSPENDED PARTICLES IN AN ESTUARINE TURBIDITY MAXIMUM ZONE
    LORING, DH
    RANTALA, RTT
    MORRIS, AW
    BALE, AJ
    HOWLAND, RJM
    CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1983, 40 : 201 - 206
  • [43] Suspended Sediment Dynamics in the Macrotidal Seine Estuary (France): 1. Numerical Modeling of Turbidity Maximum Dynamics
    Grasso, F.
    Verney, R.
    Le Hir, P.
    Thouvenin, B.
    Schulz, E.
    Kervella, Y.
    Fard, I. Khojasteh Pour
    Lemoine, J. -P.
    Dumas, F.
    Garnier, V.
    JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2018, 123 (01) : 558 - 577
  • [45] Correction to: Vertical Distributions of Suspended Sediment Concentrations in the Turbidity Maximum Zone of the Periodically and Partially Stratified Changjiang Estuary
    Zhanhai Li
    Jianjun Jia
    Yongsheng Wu
    Haibo Zong
    Guoan Zhang
    Ya Ping Wang
    Yang Yang
    Liang Zhou
    Shu Gao
    Estuaries and Coasts, 2019, 42 : 1970 - 1970
  • [46] Comparing calculated and observed vertical suspended-sediment distributions from a Hudson River Estuary turbidity maximum
    Orton, PM
    Kineke, GC
    ESTUARINE COASTAL AND SHELF SCIENCE, 2001, 52 (03) : 401 - 410
  • [47] Nutrient uptake in a highly turbid estuary (the Humber, United Kingdom) and adjacent coastal waters
    Peter J. Shaw
    Duncan A. Purdie
    Pedro S. de Frietas
    Andrew P. Rees
    Ian Joint
    Estuaries, 1998, 21 : 507 - 517
  • [48] Nutrient uptake in a highly turbid estuary (the Humber, United Kingdom) and adjacent coastal waters
    Shaw, PJ
    Purdie, DA
    De Frietas, PS
    Rees, DP
    Joint, I
    ESTUARIES, 1998, 21 (4A): : 507 - 517
  • [49] Measuring sediment exchange rates on an intertidal bank at Blacktoft, Humber Estuary, UK
    Mitchell, SB
    Couperthwaite, JS
    West, JR
    Lawler, DM
    SCIENCE OF THE TOTAL ENVIRONMENT, 2003, 314 : 535 - 549
  • [50] CHARACTERISTICS OF SUSPENDED COHESIVE SEDIMENT OF THE SEVERN ESTUARY, UK
    BRYANT, R
    WILLIAMS, DJA
    CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1983, 40 : 96 - 101