摘要: |
岬湾海滩是一种常见的重要海滩,其海滩演变与稳定性研究对满足人类对休闲海滩和港口建设等需求具有重要意义。以大鹏湾官湖沙滩为例,通过遥感影像、GENESIS、抛物线模型等研究手段进行了沙滩稳定性及演变研究。收集2010-2021年历史遥感影像,表明2010年以来,官湖沙滩西侧逐渐淤涨,年淤涨速率在1.4~2.4m/a;官湖沙滩东侧逐渐侵蚀,年侵蚀速率在1.2~2.9m/a。GENESIS模型预测官湖沙滩10年后中间岸线退后3.0m,西侧岸线受岬角保护,平均前进最大超过5m,东侧岸线变化较小,冲淤幅度较低。抛物线模型(MEPBAY)表明官湖沙滩处于动态平衡状态,容易受到侵蚀。研究结果对于海滩演变预测和海滩侵蚀风险防控具有重要意义。 |
关键词: 岬湾海滩 演变 GENESIS 抛物线模型 |
DOI: |
分类号:P753 |
基金项目: |
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The Study of the stability and evolution at Guanhu Beach in Dapeng Bay |
DING Pei, ZHANG Gongjin, DING Wei, LIU Xinglu
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Nanjing Hydraulic Research Institute
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Abstract: |
The headland beach is a kind of important and common beach and the research on the evolution and stability of the headland beach is of great significance to meet the needs of human beings for leisure beaches and port construction. Taking Guanhu beach in Dapeng Bay as an example, the stability and evolution of the beach were studied through remote sensing images, parabolic model and GENESIS. The historical remote sensing images collected from 2010 to 2021 show that since 2010, the west side of Guanhu beach has gradually silted up with an annual siltation rate of 1.4~2.4m/a, and the east side is gradually eroded with an annual erosion rate is 1.2~2.9m/a. The GENESIS model predicts that the middle shoreline of Guanghu beach will recede by 3.0m after 10 years, the western shoreline protected by the headland will advance by more than 5m on average, and the eastern shoreline will have less change and lower flushing and siltation. The Parabolic model (MEPBAY) shows that the Guanhu beach is in a dynamic equilibrium state and is vulnerable to erosion. The results are important for beach evolution prediction and beach erosion risk prevention and control. |
Key words: Headland Beach Evolution GENESIS Parabolic Model |