西沙永乐龙洞探秘前期调查工作综述  

Preliminary Investigation on the Yongle Blue Hole in Xisha Islands

作　　者：刘焱雄[1] 杜军[1] 吴志露 田梓文[1] 丰爱平[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2017年第3期305-316,共12页Advances in Marine Science

基　　金：国家自然科学基金项目--中国沿海海洋潮汐特征的GPS响应研究(41374044)

摘　　要：西沙永乐龙洞是目前已知的最深蓝洞,具有极高的科学研究与社会价值。目前永乐龙洞调查研究仅处于初级阶段,科学揭秘亟待展开,基于此,国家海洋局第一海洋研究所拟大规模开展西沙永乐龙洞探秘工作。龙洞处于永乐环礁之上,水浅礁多,周边暗礁林立,水下情况复杂多变,缺乏直接大规模探测条件,前期的进出航路探测和作业条件调查必不可少。本次调查综合利用大地控制测量、单波束测深、多波束测深与潮位控制等相关技术,对龙洞周围以及永乐环礁大船进出航路进行了综合勘测,建立了龙洞周边的大地基准,获取了目标海域的水深资料,为后期大型作业船进入永乐环礁提供了合理航道,并为其选择了最优锚地,也为工作驳船进入龙洞选定了安全航路。Among all known blue holes in the world,the Yongle Blue Hole in Xisha Islands is the deepest one,which has high scientific research and social value.The investigation on the Yongle Blue hole is only in the initial stage,and its scientific secret need to be unfolded urgently.The First Institute of Oceanography（SOA,China）plans to carry out large-scale exploration for the Yongle Blue hole.However,many factors hinder us to carry out such exploration,for example,the hole is located on the Yongle Atoll,and there are many shallow reefs and submerged reefs around the hole,and the underwater situation is complex and unstable.In this preliminary survey,by using comprehensive,combined techniques such as geodetic control,single beam sounding,multibeam bathymetry,tidal level control and other relative techniques,we explored the Blue hole and the Yongle Atoll,found out the entrance and exit for the big ship,built the geodetic data,and obtained the water depth data for the targeted areas.Finally,we provide a reasonable channel for big ships entering the Yongle Atoll,and select the optimal anchorage for the safe route,which is very helpful for large-scale exploration work on the hole in the near future.

关 键 词：永乐龙洞 水深测量 航道 锚地 

分 类 号：P711[天文地球—海洋科学]