摘要
针对近海水位观测资料空白的区域,依据经验潮汐模型采用某种假设选用数学模型导致水位预报精度不高的问题,该文提出基于水下验潮仪及浅水动力学方程精化区域水位的方案,实现稀少水位控制站点情况下的区域水位精细建模。首先基于浅水动力学方程组模拟得到区域水位,模拟过程中选用FES2014潮汐模型的水位作为开边界条件。其次,以水下验潮仪的观测数据为约束,对模拟水位进行系统偏差补偿,纠正模拟水位的系统偏差,得到目标海域的水位模型。最后,与同海域的船载GNSS海面高测量系统数据进行对比,检验基于水下验潮仪及浅水动力学方程精化近岸区域水位的建模效果。在文昌约40 km^(2)的近岸海域,近岸区域水位模型精度约为6.5 cm,可服务于区域高精度海洋潮汐建模。与同海域的船载GNSS海面高测量系统数据整体趋势一致性符合得较好,验证了在小时的时间尺度上所构建的近岸水位模型的可靠性。使用单个验潮站约束浅水动力学方程的区域水位建模方案既保证了区域水位模型精度的一致性和均匀性,又可节省水位观测成本,具有重要经济价值。
To address the issue that in areas lacking tidal station water level observations,mathematical models are often employed,based on certain assumptions,to estimate these levels,a scheme for refining regional water levels based on underwater pressure gauges and shallow water dynamics equations was proposed in this paper,and only used rare tide gauge station.Firstly,regional water levels were simulated using shallow water dynamics equations,using water levels from the FES2014 tidal model as open boundary conditions.Secondly,the simulated water levels were compared with observations from underwater pressure gauges,and corrections were made to the simulated water levels based on tidal station data to achieve refinement.Finally,the effectiveness of the coastal water level modeling was validated by comparing it with data from a shipborne GNSS sea surface height measurement system in the same sea area.The research indicated that within the approximately 40 km^(2) coastal sea area of Wenchang,the model achieves an accuracy of approximately 6.5 cm,rendering it suitable for high-precision oceanic tidal modeling in the region.The overall trend of the model data closely matched that of the shipborne GNSS sea surface height measurement system data in the same sea area,thereby verifying the reliability of the coastal water level model on an hourly time scale.The regional water level modeling scheme that uses a single tide gauge station to constrain shallow water dynamics equations not only ensured the consistency and uniformity of the precision of the regional water level model,but also saved costs on water level observations,possessing significant economic value.
作者
柯宝贵
张丽萍
徐凡凡
李泰航
胡瑾鑫
赵翠
KE Baogui;ZHANG Liping;XU Fanfan;LI Taihang;HU Jinrin;ZHAO Cui(State Key Laboratory of Spatial Datum,Xi'an 710054,China;National Precise Gravity Measurement Facility,Huazhong University of Science and Technology,Wuhan 430074,China;Chinese Academy of Surveying and Mapping,Beijing100036,China;Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;College of Applied Science and Technology,Beijing Union University,Beijing 102200,China)
出处
《测绘科学》
北大核心
2025年第6期10-15,共6页
Science of Surveying and Mapping
基金
中央级公益性科研院所基本科研业务费项目(AR2404)
北京联合大学科研项目(ZK20202204)
国家自然科学基金重点项目(41930535)
地理信息工程国家重点实验室项目(SKLGIE2024-ZZ-7)。
关键词
海洋水位精化
浅水动力学方程
水下验潮仪
海洋潮汐
refining of sea water level
dynamic equations of shallow water
underwater pressure gauge
ocean tide
