A ship's grounding appears to be a significant threat to the safety of its crew, marine environment and the local ports economy. The risk of such incidents is higher in rivers since weather conditions can significantly alter the depths of channels from those shown on navigation charts. By means of a fuzzy analytic hierarchy process, a new methodology is proposed, capable of evaluating the hazards of a ship's grounding in a river. The proposed method contributes to safe navigation in rivers. Navigators are able to assess grounding risk in a river passage based on local information of past incidents. The proposed methodology is used to evaluate commercial risks from groundings in the Parana River. A case study was carried out using data from 118 cases, as provided by local agencies for the period 2008–2017.

中文翻译：

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河流中船舶搁浅的风险评估：以巴拉那河为例

船舶搁浅似乎对其船员安全、海洋环境和当地港口经济构成重大威胁。河流中此类事件的风险更高，因为天气条件会显着改变航道上显示的航道深度。通过模糊层次分析法，提出了一种新的方法，能够评估船舶在河流中搁浅的危害。所提出的方法有助于河流的安全航行。导航员能够根据过去事件的当地信息评估河道中的搁浅风险。建议的方法用于评估巴拉那河搁浅的商业风险。使用地方机构提供的 2008-2017 年期间的 118 个案例的数据进行了案例研究。