长江流域中游似大地水准面精化模型构建及应用  

Construction and application of Quasi-geoid Refinement Model in middle reaches of Changjiang River Basin

作　　者：张晓萌 吴昊 ZHANG Xiaomeng;WU Hao(Hydrological and Water Resources Survey Bureau in the Middle Yangtze River,Hydrology Bureau of Changjiang Water Resources Commission,Wuhan 430012,China)

机构地区：[1]长江水利委员会水文局长江中游水文水资源勘测局,湖北武汉430012

出　　处：《水利水电快报》2025年第3期45-51,共7页Express Water Resources & Hydropower Information

基　　金：2023年度水文局科技创新基金项目“平原水道区域似大地水准面精化模型建立”(SWJ-CJX20Y04)。

摘　　要：由于利用传统高程控制测量方法构建长江流域中游平原水道区域高精度高程基准模型较为困难,提出了考虑EGM2008地球重力场模型和不同精度GNSS/水准点在模型精化过程中的权重并适当抵抗粗差的该区域似大地水准面精化模型建立方法。结果表明:该方法可实现长江流域中游高程基准精化模型的建立,更加逼近真实高程异常状况,减少繁杂的水准测量工作,提高外业测量生产效率。In view of the difficulty of building a high-precision elevation datum model of the plain waterway in the middle reaches of Changjiang River Basin by traditional elevation control survey method,we proposed a regional quasi-geoid refinement modeling method that take into account the EGM2008 earth gravity field model and the weights of different precision GNSS/leveling points in the model refinement process and appropriately resist the coarse difference.The results show that:the regional quasi-geoid refinement model of the plain waterway in the middle reaches of Changjiang River Basin can be established seamlessly by this method,which can more realistically approximate the real elevation anomaly,reduce the complicated leveling measurement work and improve the field measurement productivity.

关 键 词：似大地水准面精化 抗差稳健估计 二次曲面拟合 高程异常 平原水道区域 长江流域中游 

分 类 号：P224.1[天文地球—大地测量学与测量工程] P228.4[天文地球—测绘科学与技术]