长沙理工大学学报（自然科学版）2025，Vol.22Issue(3)：141-152,12.DOI:10.19951/j.cnki.1672-9331.20240325003
伶仃洋河口湾水沙运动特性数值研究
Numerical study of water and sediment movement characteristics in Lingding Bay
摘要
Abstract
[Purposes]This paper aims to fully understand the evolution characteristics and trends of water and sediment environments in the Lingding Bay area of the Pearl River Estuary in recent years and provide technical support for port channel planning.[Methods]Based on Delft3D,a two-dimensional hydrodynamic model of the Lingding Bay area of the Pearl River Estuary was established to simulate the dynamic process of water and sediments in the Lingding Bay area of the Pearl River Estuary in July 2007.The results were in good agreement with the measured data.Based on the measured topographic data in 2007 and 2021,the dynamic and geomorphic evolution of water and sediments in the Lingding Bay area of the Pearl River Estuary were simulated,and the characteristics of water and sediment movement in different years were compared and analyzed,as well as erosion and siltation evolution.[Findings]From 2007 to 2021,the sediment content,flow velocity,flow direction,and the evolution characteristics of erosion and siltation in the Lingding Bay area have changed obviously.When the spring tide rises and falls rapidly,the flow velocity increases by 0.35 m/s at the maximum and decreases by 0.3 m/s at the maximum;the flow direction deflects by 38° at the maximum,and the distribution of sediment content changes is basically consistent with that of the flow velocity.In addition,the maximum sediment content reduction is about 0.1 kg/m3,and the average siltation thickness in the northern area of the Neilingding Island is 0.03 m.[Conclusions]From 2007 to 2021,the northern area of the Neilingding Island has mainly experienced sediment siltation,and some areas of the east and west troughs have changed from erosion to siltation.The middle and east beaches will continue to expand in the east and west directions,respectively,and the sand pit area in the northern area of the Neilingding Island will continue to silt and gradually become shallow.关键词
地形演变/伶仃洋/数值模拟/淤积/冲刷/水沙运动Key words
topographical evolution/Lingding Bay/numerical simulation/siltation/erosion/water and sediment movement分类
建筑与水利引用本文复制引用
龚李锐,蒋昌波,陈杰..伶仃洋河口湾水沙运动特性数值研究[J].长沙理工大学学报（自然科学版）,2025,22(3):141-152,12.基金项目
国家重点研发计划项目(2021YFB2601100) （2021YFB2601100）
国家自然科学基金项目(52271257) （52271257）
湖南省自然科学杰出青年基金项目(2022JJ10047) National Key R&D Program of China(2021YFB2601100) （2022JJ10047）
National Natural Science Foundation of China(52271257) （52271257）
Natural Science Foundation of Hunan Province for Distinguished Young Scholars(2022JJ10047) （2022JJ10047）
