高位池养殖尾水排放对海滩表层沉积物横向粒度分布的影响初探  

Preliminary study on the influence of high-level pond aquaculture effluent discharge on the lateral grain size distribution of beach surface sediments

作　　者：李高聪 莫金玲 王中铎[2] 唐杰平 李志强 祁雅莉 LI Gaocong;MO Jinling;WANG Zhongduo;TANG Jieping;LI Zhiqiang;QI Yali(College of Electronic and Information Engineering,Guangdong Ocean University,Zhanjiang,Guangdong 524088,China;College of Fisheries,Guangdong Ocean University,Zhanjiang,Guangdong 524088,China;Key Laboratory of Tropical Marine Ecosystem and Bioresource,Ministry of Natural Resources,Beihai,Guangxi 536009,China)

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]广东海洋大学水产学院,广东湛江524088 [3]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

出　　处：《华东师范大学学报(自然科学版)》2025年第2期86-96,共11页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(42176167);广东省科技厅科技基础条件建设项目(2021B1212110005);广东省基础与应用基础研究基金(2023A1515012041);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)。

摘　　要：基于表层沉积物的特征粒径、粒级组成和粒度参数的特征值和分布特征,探讨了雷州半岛东部受高位池影响岸滩和未受高位池影响岸滩的沉积物分布信息的异同及原因.结果表明:①未受影响岸滩的采样断面样品的特征粒径(D_(10)、D_(50)和D_(90))较为接近,而受影响岸滩的数值差异较大;②未受影响岸滩的细砂、中砂和粗砂组分含量接近,而受影响岸滩的数值无明显规律;③未受影响岸滩的粒度参数的值域较为接近,而受影响岸滩的数值差异较大;④未受影响岸滩表现出由陆向海平均粒径变细、分选更好和更加负偏的变化趋势,而受影响岸滩主要表现出平均粒径变粗、分选变差和偏态更加正偏的逆向变化趋势.高位池养殖尾水间歇性下泄过程及其产物冲沟地形,是造成其沉积物横向分布与未受高位池影响岸滩存在差异的主要原因.提供了一个高位池养殖活动影响海滩表层沉积物横向粒度分布特征的典型案例,结果有助于提升对人类活动与砂质岸滩沉积和地貌过程相互作用机理方面的认识.High-level pond aquaculture activity is common on the sandy coasts of South China.Exploring how its tailwater discharge process affects the sedimentary distribution pattern of the beach is crucial for the sustainable utilization and value-added services of coastal resources.Based on the characteristic values and distribution characteristics of surface sediment grain-size,grain composition,and grain-size parameters,this study explored the similarities and differences in grain-size distribution information between high-level pond beaches and normal beaches in the eastern part of Leizhou Peninsula,as well as the reasons behind them.The results showed that:①the characteristic grain-sizes(D_(10),D_(50),and D_(90))of normal beaches were relatively close,while the high-level pond beaches exhibited larger differences;②normal beaches mainly contained fine,medium,and coarse sand with similar content;however,no discernable pattern in the high-level pond beach profiles was observed;③the range of average grain-size,sorting coefficient,skewness,and kurtosis of normal beaches were relatively close,while the high-level pond beaches exhibited larger differences;and④normal beaches showed a trend of finer average grain-size,better sorting,and more negative skewness from land to sea,while the profiles of the high-level pond beaches mainly exhibited a reverse trend of coarser average grain-size,poorer sorting,and more positive skewness.The intermittent discharge process of tailwater from high-altitude aquaculture and its products,as well as the topography of gullies,were the main reasons for the differences in the lateral distribution of sediment between them and the unaffected beaches.This study provides a typical case of how high-level pond aquaculture activities affect the lateral grain-size distribution characteristics of beach surface sediments,which contributes to a better understanding of the interaction mechanisms between human activities and beach sediment and geomorphic processes.

关 键 词：表层沉积物 粒度分布信息 高位池影响岸滩 湛江东海岛 

分 类 号：P736.213[天文地球—海洋地质]