高位池养殖尾水排放影响下的砂质海岸表层沉积物对2203号台风“暹芭”的响应  

Influence of high-level pond aquaculture tailwater discharge on the response characteristics of surface sediment on the beach to Typhoon No.2203 Chaba

作　　者：袁明明 王华强 唐杰平 陈德志 陈洋 李高聪 Yuan Mingming;Wang Huaqiang;Tang Jieping;Chen Dezhi;Chen Yang;Li Gaocong(College of Electronic and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;Key Laboratory of Tropical Marine Ecosystem and Bioresource,Ministry of Natural Resources,Beihai 536009,Guangxi,China;The Navigation Guarantee Center of South China Sea,Ministry of Transport,Guangzhou China,510320)

机构地区：[1]广东海洋大学电子与信息工程学院,广东湛江524088 [2]自然资源部热带海洋生态系统与生物资源重点实验室,广西北海536009 [3]交通运输部南海航海保障中心,广东广州510320

出　　处：《海洋学报》2025年第1期51-62,共12页

基　　金：自然资源部热带海洋生态系统与生物资源重点实验室开放基金(2023QN04);2024年广东省普通高校青年创新人才类项目(2024KQNCX134);2024年省级人才发展战略专项资金项目(2024R3005);广东海洋大学科研启动经费项目(060302112104)。

摘　　要：开展高位池养殖尾水排放影响砂质海岸对台风的响应机理研究对于促进海岸资源的可持续利用和增值服务具有重要意义。本文基于沉积物的特征粒径、粒级组分和粒度参数等指标,对比分析了2203号台风“暹芭”事件前后,粤西东海岛高位池尾水排放影响岸滩和正常岸滩粒度分布特征及其差异原因。研究结果显示:(1)台风过后,出现了正常岸滩沉积物的粒径分选变差、近岸侧细化和近海侧粗化的特点;(2)受影响岸滩沉积物的分选系数在台风后保持稳定,而其他参数(特征粒径、粒级组分和粒度参数)未表现出统一的变化规律;(3)台风后,受影响岸滩沉积物的特征粒径(D_(10)、D_(50)和D_(90))及平均粒径的均值变化幅度显著高于正常岸滩。台风引发的强烈波浪作用和水位上升是导致正常岸滩沉积响应的关键因素,而高位池影响岸滩对台风的响应则更为复杂,它是高位池尾水排放形成的冲沟地形及其沉积物再分配过程与风暴期间的风暴潮过程耦合作用的结果。本研究为高位池影响岸滩沉积物粒度信息对台风事件的响应特征提供了研究案例,有助于提升对极端事件与海水养殖活动在海滩地貌演化中相互作用机制的理解。Investigating the impact of high-level pond aquaculture effluent discharge on the response mechanisms of sandy coastlines to typhoons is of significant importance for promoting the sustainable use and value enhancement of coastal resources.This study conducts a comparative analysis of sediment characteristics,including particle size,grain size distribution,and grain size parameters,before and after Typhoon No.2203,Chaba,focusing on the influence of effluent discharge from high-level ponds on the coastal sediment distribution at Donghai Island in western Guangdong,as well as on normal coastal areas.The research findings indicate the following:(1)After the typhoon,the sediment in normal coastal areas exhibited poorer sorting,with finer sediments nearshore and coarser sediments offshore.(2)The sorting coefficient of sediment from the affected coastal area remained stable posttyphoon,while other parameters(characteristic particle size,grain size composition,and grain size parameters)did not show a consistent pattern of change.(3)The average changes in characteristic particle sizes(D_(10),D_(50),and D_(90))and mean particle size of the affected coastal sediments were significantly greater than those of the normal coastal sediments after the typhoon.The intense wave action and rising water levels induced by the typhoon are critical factors influencing the sediment response in normal coastal areas.In contrast,the response of sediments in the affected coastal areas is more complex,resulting from the interplay between the gully topography created by effluent discharge and sediment redistribution processes,coupled with storm surge dynamics during the storm.This study provides a case for understanding the sediment grain size response characteristics of coastal areas influenced by high-level pond effluent during typhoon events,contributing to a better understanding of the interaction mechanisms between extreme events and aquaculture activities in coastal geomorphological evolution.

关 键 词：高位池养殖 砂质海岸 沉积物粒度 台风 粤西东海岛 

分 类 号：P737.1[天文地球—海洋地质]