Boaga Jacopo, Boschi Lapo
Dipartimento di Geoscienze, Università degli Studi di Padova, Padua, Italy.
Sorbonne Université, CNRS, INSU, Institut des Sciences de la Terre de Paris, ISTeP UMR 7193, F-75005 Paris, France.
Water Air Soil Pollut. 2022;233(6):221. doi: 10.1007/s11270-022-05653-2. Epub 2022 Jun 7.
We illustrate the implementation and results of a field experiment, consisting of recording continuous signal from a hydrophone 3 m deep in the Venetian lagoon. We simultaneously recorded audio signal through a microphone placed on a nearby pier. We investigate the potential of this simple instrumental setup to explore the small touristic boat traffic contribution to the underwater noise. The ultimate goal of our work is to contribute to quantifying underwater noise pollution due to motorboat passages and its impact on the ecosystem. Efforts such as ours should help to identify measures that could diminish noise pollution, focusing specifically on the aspects that are most disruptive to underwater life. After this preliminary test, more work can be planned, involving the deployment of a larger network of similar instruments around the lagoon. At this point, we can conclude that (i) our instruments are sensitive enough to detect motorboats and identify some of their characteristics; (ii) the area of interest is characterized by a large (approx. 20 dB) day/night difference in ambient noise; and (iii) the historic center of Venice and its immediate surroundings are particularly noisy, in comparison to other similarly studied locations.
我们展示了一项实地实验的实施过程和结果，该实验包括记录威尼斯泻湖3米深处水听器的连续信号。我们同时通过放置在附近码头的麦克风记录音频信号。我们研究了这种简单仪器设置在探索小型旅游船交通对水下噪声贡献方面的潜力。我们工作的最终目标是为量化摩托艇航行造成的水下噪声污染及其对生态系统的影响做出贡献。像我们这样的努力应该有助于确定可以减少噪声污染的措施，特别关注对水下生物最具干扰性的方面。经过这次初步测试，可以规划更多工作，包括在泻湖周围部署更大的类似仪器网络。此时，我们可以得出以下结论：（i）我们的仪器足够灵敏，能够检测到摩托艇并识别其一些特征；（ii）感兴趣的区域环境噪声存在较大的（约20分贝）昼夜差异；（iii）与其他类似研究地点相比，威尼斯历史中心及其周边地区特别嘈杂。
