Technical note: Bathymetry observations of inland water bodies using a tethered single-beam sonar controlled by an unmanned aerial vehicle

Technical note: Bathymetry observations of inland water bodies using a tethered single-beam sonar controlled by an unmanned aerial vehicle
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技术说明：使用无人机控制的系留单波束声纳对内陆水体进行测深观测

DOI：
10.5194/hess-22-4165-2018
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发表时间：
2018
期刊：
Hydrology and Earth System Sciences
影响因子：
6.3
通讯作者：
P. Bauer‐Gottwein
P. Bauer‐Gottwein
中科院分区：
地球科学2区
文献类型：
--
作者：
Filippo Bandini;D. Olesen;J. Jakobsen;C. M. Kittel;Sheng Wang;Mónica García;P. Bauer‐Gottwein

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抽象的。高质量的内陆水体水深图是一种常见的 水利工程和水文科学应用的要求。 遥感方法，如星载和机载多光谱 成像或激光雷达已经被开发出来用于估计水深，但 对大多数内陆水体无效，因为 水中的电磁辐射，尤指在浑浊条件下。 用配备声纳的船只进行调查可以获取准确的水域 深度，但昂贵，耗时，不适合不能航行 水体。我们开发和评估了一种新的方法来检索准确和高分辨率的水深地图。我们测量了精确的水深 无人飞行器(UAV)控制的系泊浮动声纳 位于丹麦的两条不同的河流中。已开发的技术 结合了遥感的优势和水深测量的潜力 声纳。无人机调查也可以在不能导航、无法到达或 偏远的水体。系留声纳可以用一种 ∼的精确度为实际深度的2.1 % 35 m，不受水的浊度、河床形状或 床料。
Abstract. High-quality bathymetric maps of inland water bodies are a common requirement for hydraulic engineering and hydrological science applications. Remote sensing methods, such as space-borne and airborne multispectral imaging or lidar, have been developed to estimate water depth, but are ineffective for most inland water bodies, because of the attenuation of electromagnetic radiation in water, especially under turbid conditions. Surveys conducted with boats equipped with sonars can retrieve accurate water depths, but are expensive, time-consuming, and unsuitable for unnavigable water bodies. We develop and assess a novel approach to retrieve accurate and high-resolution bathymetry maps. We measured accurate water depths using a tethered floating sonar controlled by an unmanned aerial vehicle (UAV) in a lake and in two different rivers located in Denmark. The developed technique combines the advantages of remote sensing with the potential of bathymetric sonars. UAV surveys can be conducted also in unnavigable, inaccessible, or remote water bodies. The tethered sonar can measure bathymetry with an accuracy of ∼2.1 % of the actual depth for observations up to 35 m, without being significantly affected by water turbidity, bed form, or bed material.