EVOLUTION OF THE EBB-TIDAL DELTA IN ZHANJIANG BAY TIDAL INLET
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摘要:
基于湛江湾口外海图地形资料，采用GIS与动力地貌分析的方法，研究了近50年来湛江湾口外落潮三角洲的冲淤变化特征，对湛江湾口外落潮三角洲的演变机制进行了探讨。湛江口外落潮三角洲体系包括口外东北浅滩、西南边滩及口门通道深槽。近50年来，东北浅滩东缘及滩顶出现了侵蚀后退，浅滩西缘和南缘呈淤积趋势，东北浅滩整体有西移南扩趋势；西南边滩有不同程度的侵蚀后退；口门通道深槽有所淤积。湛江湾口外落潮三角洲侵蚀与沿岸泥沙供给不足及人类活动影响有关，口门通道深槽淤积除与落潮三角洲侵蚀泥沙向西搬运有关外，还可能与湛江湾内围垦导致口门通道潮汐动力减弱有关。航道北侧东北浅滩变化对航道回淤的可能影响值得关注。
Abstract:Based on the bathymetric and hydrological data collected, this paper deals with the seabed erosional and depositional patterns of the ebb-tidal delta in the tidal inlet of Zhanjiang Bay as well as the evolutionary mechanisms of the ebb-tidal delta for the past 50 years. The ebb-tidal delta consists of three components, i.e. the northeast shoal, the southwest shallow, and the deep trough outside the inlet. In the past 50 years, the east edge and the top of the northeast shoal have experienced the process of erosion, while the west and south edge of the shoal remained in siltation. The shoal thus moved westward and expanded southward as a whole; The southwest shoal has been slightly eroded as the deep trough outside the inlet suffered a slight siltation. The evolutionary characteristics of the ebb-tidal delta is influenced by insufficient sediment supply along the coast and human activities nearby, and the silting in the deep trough may be related to the weakening of the tidal dynamics in the tidal inlet caused by reclamation of Zhanjiang Bay; The shallow shoal on north side of the navigating channel has been expanding southward gradually and its impact on back siltation of the channel must be considered.
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Key words:
- ebb-tidal delta /
- evolution characteristics /
- tidal inlet /
- Zhanjiang Bay
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[1] HAYES M O. General morphology and sediment patterns in tidal inlets[J]. Sedimentary Geology,1980,26(1/3):139-156.
[2] 张乔民,郑德延. 潮汐汊道沉积动力与现代地貌过程国内外研究进展[J]. 海洋通报,1992,11(1):84-92.
[3] 张忍顺. 中国潮汐汊道研究的进展[J]. 地球科学进展,1994,9(4):45-49.
[4] 李春初,罗宪林,张镇元,等. 粤西水东沙坝潟湖海岸体系的形成演化[J]. 科学通报,1986,31(20):1597-1582.
[5] 李春初. 华南港湾海岸的地貌特征[J]. 地理学报,1986,41(4):311-320. doi: 10.3321/j.issn:0375-5444.1986.04.003
[6] 张忍顺,李坤平. 黄渤海沿岸海湾—溺谷型潮汐汊道的地貌结构[J]. 黄渤海海洋,1994,12(4):1-10.
[7] 李春初. 一种假说:湛江港(湾)成因问题之思考[J]. 热带地理,2013,33(5):636-639.
[8] 张乔民,郑德延,李绍宁,等. 湛江港潮汐汊道落潮三角洲沉积动力过程[J]. 地理学报,1995,62(5):421-429. doi: 10.3321/j.issn:0375-5444.1995.05.005
[9] 赵冲久. 湛江湾水文泥沙特性分析[J]. 水道港口,1999,20(4):16-21.
[10] 蔡嘉熙,陈炳安,李孟国. 湛江港深水航道开发的淤积问题[J]. 水道港口,1994,15(1):15-21.
[11] 李文丹, 张娜, 谢华亮, 等. 湛江港30万吨级航道改扩建工程B点附近泥沙数学模型试验研究报告[R]. 天津: 交通运输部天津水运工程科学研究所, 2018.
[12] 黄玉昆,夏法,黄导繁,等. 南海北部沿岸全新世海面变动与近代地壳运动[J]. 海洋学报(中文版),1982,4(6):713-723.
[13] 王文介. 华南入海河流泥沙及其对海岸和陆架的影响初探[J]. 泥沙研究,1986(4):27-36.
[14] BRUUN P. Stability of Tidal Inlets: Theory and Engineering [M]. Amsterdam: Elsevier, 1978.
[15] 张志飞,诸裕良,何杰. 多年围填海工程对湛江湾水动力环境的影响[J]. 水利水运工程学报,2016(3):96-104.
[16] 广东省自然资源厅挂牌出让海砂开采海域使用权采矿权预告[EB/OL]. [2019-5-8]. http://nr.gd.gov.cn/zwgknew/zdlyxxgk/kcqss/kyqgs/content/post_2782839.html.
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