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1986–2019年粤东企望湾砂质海岸线演变过程与驱动机制研究

朱萝云 刘婷婷 凡仁福 丁圆婷 于吉涛

朱萝云,刘婷婷,凡仁福,等. 1986–2019年粤东企望湾砂质海岸线演变过程与驱动机制研究[J]. 海洋学报,2022,44(7):82–94 doi: 10.12284/hyxb2022100
引用本文: 朱萝云,刘婷婷,凡仁福,等. 1986–2019年粤东企望湾砂质海岸线演变过程与驱动机制研究[J]. 海洋学报,2022,44(7):82–94 doi: 10.12284/hyxb2022100
Zhu Luoyun,Liu Tingting,Fan Renfu, et al. Study on the evolution process and driving mechanism of the sandy shoreline of the Qiwang Bay in eastern Guangdong from 1986 to 2019[J]. Haiyang Xuebao,2022, 44(7):82–94 doi: 10.12284/hyxb2022100
Citation: Zhu Luoyun,Liu Tingting,Fan Renfu, et al. Study on the evolution process and driving mechanism of the sandy shoreline of the Qiwang Bay in eastern Guangdong from 1986 to 2019[J]. Haiyang Xuebao,2022, 44(7):82–94 doi: 10.12284/hyxb2022100

1986–2019年粤东企望湾砂质海岸线演变过程与驱动机制研究

doi: 10.12284/hyxb2022100
基金项目: 国家自然科学基金(42071007,41701011);2021年海南省本级部门预算项目“珊瑚岛礁泥沙湍动力过程观测技术构建与应用”。
详细信息
    作者简介:

    朱萝云(1994―),女,河南省永城市人,从事地理信息技术及应用研究。E-mail:1076304138@qq.com

    通讯作者:

    于吉涛(1981―),男,山东省威海市人,博士,副教授,从事海滩过程与海岸地貌研究。E-mail:ddyjt@163.com

  • 中图分类号: P737.1

Study on the evolution process and driving mechanism of the sandy shoreline of the Qiwang Bay in eastern Guangdong from 1986 to 2019

  • 摘要: 本文采用1986–2019年113景Landsat影像提取高潮线,辅以2015–2019年实测剖面数据,开展了海湾尺度上海岸线的中长期演变过程与驱动机制研究。结果表明:企望湾以中间小型基岩岬角为界划分出的西侧海滩和东侧海滩分别具备4种和3种不同的空间特征;超过一半的区域其海岸线演变表现为非线性行为;Mann-Kendall趋势检验和显著性分析方法较好地解决了已有研究中对研究时段划分缺乏依据的问题;近5年的实测剖面数据也验证了企望湾近期显著的淤积和侵蚀现象。进一步研究表明,自西向东的沿岸输沙过程是近期海岸线演变主要的驱动机制,东侧防波堤因为改变了控制性“岬角”的位置,造成了海湾平面形态不平衡,而中间小型基岩岬角也影响了企望湾侵蚀和淤积的空间差异性。研究结果对于预测未来岸线位置和控制岸线侵蚀风险具有重要的理论和现实意义。
  • 图  1  研究区位置和等深线、剖面布设

    黑点处113 m和179 m代表此处的高程

    Fig.  1  Location of the study area, and its bathymetric contours and profile arrangement

    113 m and 179 m at the black spots are the distance height

    图  2  使用的Landsat陆地卫星影像成像时刻潮高

    Fig.  2  Landsat series satellite images available and tidal heights at the time of imaging

    图  3  2015–2019年夏季企望湾4条海滩剖面地形变化情况

    Fig.  3  The morphological changes of four beach profiles at the Qiwang Bay in the summers of 2015 to 2019

    图  4  1986–2019年企望湾海岸线进退情况

    Fig.  4  Shoreline advance and recession of the Qiwang Bay during 1986 to 2019

    图  5  LRR方法计算的企望湾不同时段海岸线进退情况

    Fig.  5  Shoreline advance and recession during different periods calcultated by LRR method at the Qiwang Bay

    图  6  采用线性拟合方法和二项式拟合方法得到断面的长期趋势特征

    Fig.  6  Long-term trend characteristics of individual intersect obtained by the methods of linear and binomial fitting

    图  7  M-K趋势检验得到具体断面的变化趋势及显著性检验

    箭头指示了断面趋势发生明显变化

    Fig.  7  The changing trend and significance test of specific transect obtained by M-K trend detecting method

    The arrows indicate a marlced charge in the trend of the transect

    图  8  企望湾典型侵蚀(a−c,g−i)和淤积(d−f)岸段的特征

    Fig.  8  Erosion (a−c, g−i) and accretion (d−f) characteristics of typical segments at the Qiwang Bay

    图  9  MEPBAY软件模拟东侧防波堤建设前后对海湾平衡平面形态的影响(a:动态平衡;b:不稳定)

    Fig.  9  Modelling the impact of the absence and presence of the east breakwater on headland-bay equilibrium plan-form by the software of MEPBAY (a: dynamic equilibrium; b: unstable state)

    表  1  企望湾潮间带海滩平均坡度和泥沙粒径的沿岸变化

    Tab.  1  Longshore variation in average beach gradient and sediment size from the intertidal beach at the Qiwang Bay

    剖面西部海滩东部海滩
    P01P02P03P04P05P06P07P08P09P10P11P12
    上部坡度/(°)7.14.84.63.11.82.22.09.17.56.32.72.8
    下部坡度/(°)6.25.93.42.01.21.21.37.24.84.22.31.6
    上部粒径(Φ)1.601.581.842.282.412.472.441.301.051.502.272.54
    下部粒径(Φ)1.501.481.982.202.292.422.321.441.431.562.322.53
    下载: 导出CSV

    表  2  近5年实测岸线位置数据和遥感岸线位置数据使用EPR和LRR方法计算的岸线变化速率值对比

    Tab.  2  Comparison of the values of shoreline change rate by the methods of EPR and LRR using measured shoreline position data and remote sensing shoreline position data in recent five years

    实测剖面对应断面实测岸线EPR值/(m·a−1遥感岸线EPR值/(m·a−1实测岸线LRR值/(m·a−1遥感岸线LRR值/(m·a−1
    P01T40−1.15−3.52−1.65−3.13
    P02T59−0.20−4.39−0.65−5.23
    P03T104−0.500.44−0.18−0.30
    P04T1222.805.243.025.83
    P05T1387.9810.057.808.66
    P06T15317.7026.5217.7319.48
    P07T16721.2030.8821.3025.41
    P08T173−6.33−9.50−7.23−9.23
    P09T1820.051.18−0.080.65
    P10T19316.5520.2715.2014.45
    P11T20215.323.8514.4620.58
    P12T21710.213.8210.7112.95
    下载: 导出CSV
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  • 收稿日期:  2021-07-08
  • 修回日期:  2021-12-10
  • 网络出版日期:  2022-07-01
  • 刊出日期:  2022-07-01

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