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| 基于数值模拟与统计学方法的南黄海近岸沙脊与水道稳定性评价 |
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朱庆光,倪文斐,高建华,贾建军,杨磊,龚绪龙,汪亚平
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南京大学地理与海洋科学学院,University of Maryland，Center for Environmental Science,南京大学地理与海洋科学学院,国家海洋局第二海洋研究所,江苏省地质调查研究院；国土资源部地裂缝地质灾害重点实验室,江苏省地质调查研究院；国土资源部地裂缝地质灾害重点实验室,南京大学地理与海洋科学学院
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| 摘要: |
| 本研究以南黄海江苏岸外辐射沙脊群为对象，基于已验证的该区域沉积动力学数值模型模拟近30年（1979-2011年）的水下地形演化，计算辐射沙脊区域海底地形年际变化标准偏差，对沙脊和水道的地貌稳定性进行定量评估。研究发现，地形变化标准偏差愈小，地貌愈稳定；标准偏差愈高，地貌愈不稳定。定量地确定了南黄海辐射沙脊区域内沙脊与水道稳定性系数的时空分布，发现主要淤积区域位于沙脊周围，近岸沙洲有淤高的趋势；主要侵蚀区位于水道，沙脊间水道逐渐冲刷加深，如西洋水道和黄沙洋水道。本文提出的基于海底地形年际变化标准偏差确定地貌稳定性评估方法，可为海岸陆架地貌稳定性研究、区域资源开发和环境保护等提供参考。 |
| 关键词: 沙脊 潮汐水道 地貌稳定性 数值模拟 标准偏差 南黄海 |
| DOI： |
| 分类号:P737.2 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）国家自然科学基金（No. 41376044）、中国地质调查局地质大调查项目“江苏沿海经济区地质环境调查评价”（1212011220005）、“江苏省地质环境调查与区划”（1212011014002） |
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| Evaluating a geomorphological stability of coastal sand ridges and tidal channels in the southern Yellow Sea based upon numerical simulation and statistical methods |
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Zhu Qing-guang,Ni Wen-fei,Gao Jian-hua,Jia Jianjun,Yang Lei,Gong Xu-long and Wang Ya-ping
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School of Geographic and Oceanographic Science,University of Maryland，Center for Environmental Science,School of Geographic and Oceanographic Science,Second Institute of Oceanography, State Oceanic Administration,Geological Survey of Jiangsu Province；Key laboratory of Earth Fissures Geological Disaster, Ministry of Land and Resources,Geological Survey of Jiangsu Province；Key laboratory of Earth Fissures Geological Disaster, Ministry of Land and Resources,School of Geographic and Oceanographic Science
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| Abstract: |
| This paper established a geomorphological evolution model for the radial sand ridges system off Jiangsu coast. By calculating the standard deviations (STD) of inter-annual variability of terrain elevation data outputted from the model, a quantitative classification of geomorphological stability for sand ridges and tidal channels was made. The relationship between STD and geomorphological stability showed that the higher the STD was, the more the instability of landform was, vice versa. The results indicated that the major regions for siltation were around the sand ridges, especially some nearshore sand banks, whilst the major regions for erosion were in the tidal channels between sand ridges (e.g., Xiyang channel, Kushuiyang channel). Based upon STD of inter-annual variability of terrain elevation data, this quantitative analysis method for evaluating the geomorphological stability was expected to have wide applicability and referential significance to geomorphological stability research, regional resource exploitation and environment protection on coastal sand ridges and tidal channels. |
| Key words: sand ridges tidal channels geomorphological stability numerical simulation standard deviations southern Yellow Sea |