基于K-means聚类层次分析模型的中沙环礁地质环境稳定性定量分析  

Quantitative analysis of geological environment stability of the Zhongsha Atoll based on K-means clustering AHP model

作　　者：覃茂刚 龙根元 李海云[1,2] 黄海波 陈万利[4] 陈文[2] QIN Maogang;LONG Genyuan;LI Haiyun;HUANG Haibo;CHEN Wanli;CHEN Wen(Hainan Key Laboratory of Marine Geological Resources and Environment,Haikou 570206,China;Marine Geological Institute of Hainan Province,Haikou 570206,China;Key Laboratory of Ocean and Marginal Sea Geology(South China Sea Institute of Oceanology),Guangzhou 511458,China;Institute of Deep-Sea Science and Engineering,Chinese Academy of Sciences,Sanya 572000,China)

机构地区：[1]海南省海洋地质资源与环境重点实验室,海南海口570206 [2]海南省海洋地质调查研究院,海南海口570206 [3]中国科学院南海海洋研究所(中国科学院边缘海与大洋地质重点实验室),广东广州511458 [4]中国科学院深海科学与工程研究所,海南三亚572000

出　　处：《热带海洋学报》2023年第2期113-123,共11页Journal of Tropical Oceanography

基　　金：海南省海洋地质资源与环境重点实验室开放课题项目(HNHYDZZYHJKF003);南海地质构造研究项目(T100731);国家自然科学基金项目(42176081,42174110);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0204);海南省自然科学基金联合项目(2021JJLH0047)。

摘　　要：中沙环礁位于中国南海的中心地带,是连接东沙、西沙和南沙群岛的重要枢纽。文章基于中沙环礁地形、地质采样、多道地震等调查数据,选取水深、沉积物类型、构造、滑坡易发区和坡度5个影响因子,采用K均值聚类算法(K-means)和层次分析法对中沙环礁的稳定性进行定量分析,将研究区划分为稳定性好、较好、中等、较差、差5个等级。分析了不同因子对中沙环礁稳定性的影响,其中沉积物类型、坡度和水深是影响台地稳定性的主要因素。台地周缘斜坡区稳定性主要受坡度、断裂构造和滑坡易发区等因素的控制,而台地周缘斜坡外深水区坡度因子贡献最大,整体上环礁北部和西部的稳定性优于东部和南部。环礁台地和台地周缘斜坡外深水区稳定性最好,越靠近台地斜坡稳定性逐渐变差,台地斜坡上缘区域稳定性最差。评价结果可为研究区的开发规划、海底管线工程建设及防灾减灾提供基础地质服务。The Zhongsha Atoll is in the center of the South China Sea,and is a key location that connects the Dongsha,Xisha and Nansha Islands.This paper is based on the survey data of the Zhongsha Atoll topography,geological sampling,and multi-channel seismic profiles.We selected five influencing factors of water depth,sediment type,structural distance,landslide-prone area,and slope,and used the K-means clustering algorithm and analytic hierarchy process method to quantitatively analyze the stability of the Zhongsha Atoll.The study area was divided into five grades of stability:good,fair,medium,poor,and worse.We discussed the influence of different factors affecting the stability of Zhongsha Atoll.The deposition type,slope,and water depth are the main factors that affect the stability of the platform.The slope’s stability around the platform is mainly controlled by the factors such as slope,structure,and landslide-prone areas.However,the slope factor in the deep-water area outside the slope around the platform has the largest contribution.Overall,the stability of the north and west of the atoll is better than the east and south,in addition,the stability of the platform and the deep-water area outside the slope around the platform is the best.The evaluation results can provide basic geological services for development and planning,submarine pipeline engineering,disaster prevention and mitigation in the study area.

关 键 词：中沙环礁 地质环境 稳定性 K均值聚类算法 

分 类 号：P736.121[天文地球—海洋地质]