水位改正方法对水道测量精度的影响分析

Impact of Water Level Correction Method on Waterway Survey Accuracy

摘要: 影响水道地形测量精度的因素包括定位精度、测深精度以及水位的获取与方式水位推算模型等。目前，水位的获取方式和推算方式也存在多样化，特别是受水库调节影响河段工程河段，水位变化频繁、且呈非线性变化。故水位获取方式以及水位改正模型是精确获得工程调节河段水道地形测量的关键因素。本文选取三峡水库影响较大的宜昌河段进行试验，综合考虑不同水库调度模式下的水道地形测量，综合采用不同软硬件、不同的水位获取方法及推算模型进行对比分析，并得出有益结论，为河段水道地形观测提供理论及实践依据，具有较强的针对性和实用性。

Abstract: The factors affecting the accuracy of waterway topographic survey include positioning and sounding accuracies, water level acquisition and estimation methods, etc. At present, water level acquisition and estimation methods are also diversified, especially in the river reach affected by the regulation of water conservancy projects, where the water level is changed frequently and non-linearly. Therefore, how to obtain the water level and water level correction is the key to precisely obtain the topographic survey in the regulated river section. This paper chooses the Yichang river reach influenced greatly by the upper reservoir as out experiments and carries out underwater topographic survey under reservoir frequent dispatching mode. The different software, hardware and estimation methods are analyzed and compared. The useful conclusion provides a theoretical and practical basis for underwater topographic survey and has strong pertinence and practicability.