冲绳海槽中段海底灾害地质类型及海底稳定性评价  

Submarine Geohazards Types and Seabed Stability Evaluation of the Middle Part of the Okinawa Trough

作　　者：马秀冬 李萍[1,2,3] 徐元芹 高珊[1,2,3] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061 [3]青岛海洋科学与技术国家实验室海洋地质过程与环境功能试验室,山东青岛266061

出　　处：《海洋科学进展》2018年第1期79-87,共9页Advances in Marine Science

基　　金：国家自然科学基金委员会-山东省人民政府海洋科学研究中心联合资助项目--海洋地质过程与环境(U1606401);全球变化与海气相互作用专项--东亚大陆边缘海底峡谷的物质输运与破坏性浊流沉积(GASI-GEOGE-05-03);山东省自然科学基金项目--莱州湾海区沉积物的微观结构对其宏观物理力学性质的影响特征研究(BS2015HZ009)

摘　　要：通过分析研究区各类综合调查数据,识别地质灾害类型,编制海底灾害地质图;建立由地震烈度区划指标、海底灾害地质类指标、海底地貌类指标、海底沉积物类型指标组成的评价因素集,建立与评价因素集匹配的评语集。运用模糊信息化及贴近度分析等综合性方法获得评价因子对风险影响程度的隶属度值,以层次分析法确定评价因子间权重值。运用模糊数学原理构建模糊综合评价模型,以6′×6′为网格大小,对冲绳海槽中段及附近海域海底900个评价单元进行模糊综合运算及评价,并绘制了海底稳定性区划图。以期今后为该区资源的开发、防灾减灾等提供基础资料。Based on all kinds of comprehensive survey data for the middle part of the Okinawa Trough,this study identified the geohazards types,drew up the geohazards map of the seabed,and established the indicator system composing of index of seismic intensity zoning,seabed geohazards and seabed landform and seabed sediment types,and then developed the comment system which is matched with that indicator system.Using the fuzzy information and the approach degree way,we obtained the subjection value of the evaluation factors to the degree of risk,and determined the weighted value of all evaluation indicators by using analytic hierarchy process.Using fuzzy mathematics to establish the fuzzy mathematic model and taking 6′×6′ as grid size,we carried out fuzzy comprehensive operation and evaluation for 900 units in the middle part of Okinawa Trough,and drew up the seabed stability division map.This study provides some important clues for future resource development and disaster prevention and mitigation in the middle part of Okinawa Trough.

关 键 词：海底灾害地质 评价因素 模糊评价 稳定性区划 

分 类 号：P736.4[天文地球—海洋地质]