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山东半岛东部典型砂质海岸侵蚀特征及其影响因素

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利用岸滩剖面高程监测、沉积物粒度变化和动力环境分析的方法,以海阳市沙滩侵蚀演化过程为例分析了山东半岛东部典型砂质海岸的侵蚀特征和影响因素.结果表明,海阳市沙滩整体以侵蚀为主,2018-2019年沙滩总侵蚀量为2.48×104 m3.其中,丁字嘴沙滩以侵蚀为主,但两侧受河口的影响呈现局部滩面稳定和后滨弱淤积的现象;潮里—庄上—羊角畔沙滩滩面侵蚀从西向东逐渐增强;万米沙滩中部侵蚀严重,两端相对较弱.表层沉积物由陆向海逐渐变细,但整体上呈现粗化的趋势.波浪和极端天气是控制沙滩侵蚀变化的重要动力因素,而坡度则是导致沙滩剖面形态变化和表层沉积物差异的重要因素之一.
Erosion Characteristics and Influencing Factors of Typical Sandy Coasts in the Eastern Shandong Peninsula
This study discusses the erosion characteristics and influencing factors of typical sandy coasts in the Shandong Peninsula,by using the method of elevation monitoring of beach profile and sediment grain size analysis.The results show that,the beaches in the Haiyang City are mainly eroded.The total amount of erosion from 2018 to 2019 was 2.48×104 m3.The Dingzizui beach is dominated by erosion,but both sides of the beach are affected by the estuary,showing that the beach surface is stable and the backshore is weakly silted.The erosion of the Chaoli-Zhuangshang-Yangjiaopan beach has gradually increased from west to east.The central part of the the Wanmi beach is heavily eroded and the two ends were relatively weak.The grain size of surface sediments gradually becomes finer and finer from land to sea,but the overall trend appears to be coarsening.Wave and extreme weather are two important dynamic factors controlling the change of sandy beach erosion,and the slope of beach is an important factor leading to the differences of sandy beach profile and surface sediments.

sandy coastcoastal erosionerosion intensityinfluencing factorsHaiyang

魏霞、高伟、李萍、刘杰、徐元芹、张卓立、李安龙

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中国海洋大学海洋地球科学学院,山东青岛 266100

自然资源部第一海洋研究所海洋地质与成矿作用重点实验室,山东青岛 266061

青岛海洋科技中心海洋地质过程与环境功能实验室,山东青岛 266237

砂质海岸 海岸侵蚀 侵蚀强度 影响因素 海阳

国家重点研发计划项目山东省自然科学基金项目山东省重大科技创新工程专项

2022YFC3106100ZR2021MD0982018SDKJ0503-3

2024

海洋科学进展
中国海洋学会 国家海洋局第一海洋研究所

海洋科学进展

CSTPCD北大核心
影响因子:0.532
ISSN:1671-6647
年,卷(期):2024.42(2)
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