Short-term variations and influencing factors of suspended sediment concentrations at Heisha Beach, Guangdong, China

Jintang Ou Haoyan Dong Liangwen Jia Xiangxin Luo Zixiao He Kanglin Chen Jing Liu Yitong Lin Mingdong Yu Mingen Liang

Jintang Ou, Haoyan Dong, Liangwen Jia, Xiangxin Luo, Zixiao He, Kanglin Chen, Jing Liu, Yitong Lin, Mingdong Yu, Mingen Liang. Short-term variations and influencing factors of suspended sediment concentrations at Heisha Beach, Guangdong, China[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1874-3
Citation: Jintang Ou, Haoyan Dong, Liangwen Jia, Xiangxin Luo, Zixiao He, Kanglin Chen, Jing Liu, Yitong Lin, Mingdong Yu, Mingen Liang. Short-term variations and influencing factors of suspended sediment concentrations at Heisha Beach, Guangdong, China[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1874-3

doi: 10.1007/s13131-021-1874-3

Short-term variations and influencing factors of suspended sediment concentrations at Heisha Beach, Guangdong, China

Funds: The National Key Research and Development Program of China under contract No. 2016YFC0402603; the Guangdong Provincial Department of Natural Resources Project under contract No. 42090038; the Guangdong Provincial Department of Ocean and Fisheries Project under contract No. 42090033.
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  • Figure  1.  Location of the study area (a) and instrument site (b).

    Figure  2.  Linear least-squares line of best fit between turbidity and SSC of the water samples.

    Figure  3.  Power spectral density of cross-shore velocity (v) vs. frequency (blue line) for Burst 19. The red and black dashed lines indicate different spectral slopes.

    Figure  4.  Surficial sediment sampling locations.

    Figure  5.  Electron microscope image (a) and component distribution (b).

    Figure  6.  Hydrodynamic conditions during the observation period of tide level (TL) (a), water depth (h) (b), mean wave height (Hm0) (c), mean wave period (Tm0) (d), mean cross-shore current velocity (v) (e), and mean alongshore current velocity (u) (f).

    Figure  7.  SSC variation during the observation period.

    Figure  8.  Fractions of extreme SSC events to the total data points (n1/n) and the SSC percentage contained in the extreme events in the entire time series (n1m1/nm).

    Figure  9.  Mean TKE and SSC values for each burst.

    Figure  10.  Fractions of extreme TKE events to the total data points (n1/n) and the TKE percentage contained in the extreme events in the entire data set (n1m1/nm).

    Figure  11.  The fractions of correlated extreme events to the SSC (a) / TKE (b) extreme events (n0/n1) and the percent of the SSC (a) / TKE (b) contained in the correlated extreme events in relation to that in the entire time series (n0m0/nm).

    Figure  12.  Wave-induced BSS (τw), current-induced BSS (τc), combined wave-current BSS (τcw), and mean SSC value of each burst. The horizontal magenta line indicates the critical BSS (τcr=0.16 Pa).

    Figure  13.  Linear regression results between SSC and wave-induced BSS (a), current-induced BSS (b), and combined wave-current BSS (c).

    Figure  14.  Relative wave height (Hr) and SSC of all the bursts.

    Figure  15.  Linear regression results between SSC and water depth (h) (a), mean wave height (Hm0) (b), and relative wave height (Hr) (c).

    Table  1.   Sediment parameters of the samples

    Sampling pointDme($ {\text{ϕ}}$)D50($ {\text{ϕ}}$)ScSkKu
    HSW012.402.480.84−0.221.19
    HSW022.652.650.67−0.111.11
    HSW032.702.680.76−0.171.32
    HSW042.622.640.78−0.221.24
    HSW052.622.640.72−0.171.17
    HSW062.742.730.63−0.111.06
    HSW071.822.081.14−0.210.81
    HSW082.592.610.58−0.060.99
    HSW092.732.611.15 0.271.99
    HSW102.952.821.03 0.362.47
    HSW112.902.880.47 0.020.95
    HSW122.862.830.49−0.020.95
    下载: 导出CSV

    Table  2.   Statistical average of extreme events of overall bursts (332)

    Parameter n1/n/%n0/n1/%n1m1/nm/%n0m0/nm/%
    SSC10.88 (23.64)11.31 (20.06)12.57 (24.62)4.02 (10.73)
    TKE14.79 (14.90)10.93 (24.17)41.80 (32.69)8.81 (20.58)
    Note: Data are shown as the mean value (standard deviation).
    下载: 导出CSV

    Table  3.   Statistical averages of extreme events from Bursts 235–318

    Parameter(n1/n)/%(n0/n1)/%(n1m1/nm)/%(n0m0/nm)/%(n0/n)/%
    SSC40.82
    (31.57)
    30.72
    (19.52)
    45.27
    (30.44)
    15.36
    (16.76)
    14.35
    (16.78)
    TKE29.37
    (16.62)
    41.60
    (32.18)
    79.77
    (11.60)
    34.25
    (28.39)
    14.35
    (16.78)
    Note: Data are shown as the mean value (standard deviation).
    下载: 导出CSV

    Table  4.   Extreme event analysis results utilizing the comparison parameters of wave-induced BBS (τw), current-induced BBS (τc), and combined wave-current BSS (τcw)

    Parameter(n0/n)/%(n0m0/nm(SSC))/%
    ${\tau _{\rm{w} } }$18.7131.35
    ${\tau _{\rm{c} } }$13.8025.04
    ${\tau _{ {\rm{cw} } } }$20.8635.61
    Notes: n0 is the number of correlated extreme events where the extreme SSC events and comparison parameters occur synchronously, n is the number of total data points (332), m0 is the mean SSC value of the correlated extreme event data points, and m is the mean SSC value of the total data points.
    下载: 导出CSV

    Table  5.   Evaluation of the relationship between SSC and wave-induced BSS (τw), current-induced BSS (τc), and combined wave-current BSS (τcw) via the Pearson (rp) and Spearman rank (rs) correlation coefficients

    Parameterrprs
    ${\tau _{\rm{w} } }$0.780.84
    ${\tau _{\rm{c} } }$0.770.79
    ${\tau _{ {\rm{cw} } } }$0.840.89
    下载: 导出CSV

    Table  6.   Extreme event analysis results utilizing the comparison parameters of water depth (h), mean wave height (Hm0), and relative wave height (Hr)

    Parameter(n0/n)/%(n0m0/nm(SSC))/%
    h5.839.44
    Hm011.6618.63
    Hr18.1030.30
    Notes: n0 is the number of correlated extreme events where the extreme SSC events and comparison parameters occur synchronously, n is the number of total data points (332), m0 is the mean SSC of the correlated extreme event data points, and m is the mean SSC of the total data points.
    下载: 导出CSV

    Table  7.   Evaluation of the relationship between SSC and water depth (h), mean wave height (Hm0), relative wave height (Hr) via the Pearson correlation coefficient (rp) and Spearman rank correlation coefficients (rs)

    Parameterrprs
    h−0.37−0.44
    Hm00.270.25
    Hr0.820.84
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-05-07
  • 录用日期:  2021-06-21
  • 网络出版日期:  2022-01-15

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