In this work, we proposed to include remote sensing techniques as a part of the methodology for natural lake bottom mapping, with a focus on the littoral zone. Due to the inaccessibility of this zone caused by dense vegetation, measurements of the lake bottom and the coastline are also difficult to perform using traditional methods. The authors of this paper present, discuss and verify the applicability of remote sensing active sensors as a tool for measurements in the shore zone of a lake. The single-beam Lowrance HDS-7 ComboGPS echosounder with an 83/200 kHz transducer and a two-beam LiDAR RIEGL VQ-1560i-DW scanner have been used for reservoir bottom measurements of two neighboring lakes, which differ in terms of water transparency. The research has found a strong correlation between both sonar and LiDAR for mapping the bottom depth in a range up to 1.6 m, and allowed LiDAR mapping of approximately 20% of the highly transparent lake, but it has not been found to be useful in water with low transparency. In the light of the conducted research, both devices, sonar and LiDAR, have potential for complementary use by fusing both methods: the sonar for mapping of the sublittoral and the pelagic zone, and the LiDAR for mapping of the littoral zone, overcoming limitation related to vegetation in the lake shore zone.

中文翻译：

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双通道波形ALS和声纳的耦合，用于研究湖底和海岸带

在这项工作中，我们建议将遥感技术作为自然湖底测绘方法的一部分，重点放在沿岸带。由于茂密的植被导致该区域无法进入，因此使用传统方法也难以对湖底和海岸线进行测量。本文的作者介绍，讨论并验证了遥感主动传感器作为在湖岸带进行测量的工具的适用性。具有83/200 kHz换能器和两束LiDAR RIEGL VQ-1560i-DW扫描仪的单束Lowrance HDS-7 ComboGPS回波测深仪已用于测量两个相邻湖泊的储层底部，这在水的透明度方面有所不同。该研究发现声纳和LiDAR之间的强相关性可用于绘制最深1.6 m范围内的底部深度，并允许对高度透明的湖泊进行约20％的LiDAR映射，但尚未发现它在水中的有用性透明度低。根据进行的研究，声纳和LiDAR这两种设备通过融合以下两种方法，具有互补使用的潜力：沿声纳绘制近海底和中上层带的声纳，以及LiDAR映射沿海沿带的声纳，克服了与限制有关的问题到湖岸带的植被。