无验潮与有验潮水下地形测量精度分析研究

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中图分类号：TP39 文献标识码：A 文章编号：2096-4706（2025）16-0142-04

Precision Analysis Research on Underwater Topographic Surveying without Tidal Observation and Tidal Observation

WANG Bing， FENG Yingxu （China Water Resources Beifang Investigation，Design and Research Co.，Ltd.，Tianjin 3oo222，China）

Abstract：Underwater topographicsurveying technology is primarilydivided intotwomodes of the tide-free and tidedependent.To systematically evaluate the measurement accuracyof these two modes，this project selects a tidal zone in PanjinCity，LiaoningProvinceasthexperimentalsite.Underthesameexperimentalconditions，RTKtide-freeunderwater topographic surveying and tide-dependent underwater topographic surveying areconducted.At the same time，the more accurate airborneLiDARpointclouddataisusedasthe true value forcomparative analysis，andtheresultsshow that in terms ofaccuracy，thedepthmeasurementaccuracyoftide-dependentandtide-freemethodsisquitesimilar，butthetide-freedepth measurementisslightlymore accurate.Aprerequisitefortide-free depth measurementis that the surveying mustbeconducted inareascovered byarefined geoid model. Otherwise，traditional tide-dependent depth measurement methods mustbe used for topographic surveying.

Keywords：underwater topographic surveying;without tidal observation;tidalobservation;airbome laserrada

0 引言

水下地形测量是指测量江河、湖泊、水库、港湾和近海水底点的平面位置和高程进行测量，用以绘制水下地形图的测绘工作。（剩余5308字）