This study proposed an environmental sustainability index (ESI) to aid the identification of suitable areas for the installation of tidal power plants (TPPs) in coastal areas. Geographic Information System (GIS) and multicriteria analysis (MCA) were integrated to construct the proposed method. ESI consisted of a subindex of environmental fragility (EFI) with six components (geology, geomorphology, vegetation, slope, pedology, and land use), selected from the scientific literature. Therefore, the method serves as a guiding tool for coastal regions without existing information on the environmental impacts generated by this type of energy system. A consultation process with experts, the Delphi method, was conducted to assign weights to the components and subcomponents of the proposed ESI method. The study tested the method on a case study at the sector III of the coastal zone of the state of Pará (CZP), Brazil. The simulations considered scenarios with the installation of TPP of different scales. Scores close to 3 were considered less fragile sites in the ESI. The municipalities with the best ESI performance were São Sebastião da Boa Vista for scenarios I (2.7721) and II (2.126), and Soure for scenario III (1.9908). Moreover, ESI analysis revealed that small tidal dams for sector III are more feasible than medium and large dams. The use of GIS integrated with MCA provided a useful tool to analyze different parameters and visualize areas with the greatest environmental potential. There are challenges associated with complexity of MCA, dependency on expert's opinion, and subjectivity of the weighting system. In addition, limited data is available for the region, which hindered us to explore more fragility parameters.

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对潮汐能发电厂的可持续发展区域进行排名：以巴西北部海岸线为例

这项研究提出了一种环境可持续性指数（ESI），以帮助确定在沿海地区安装潮汐能发电厂（TPP）的合适区域。整合了地理信息系统（GIS）和多准则分析（MCA）来构造该方法。ESI由环境脆弱性（EFI）子索引组成，该子索引从科学文献中选出六个部分（地质，地貌，植被，坡度，土壤学和土地利用）。因此，该方法可作为沿海地区的指导工具，而无需有关此类能源系统所产生的环境影响的现有信息。与专家进行了协商（德尔菲法），以将权重分配给提议的ESI方法的组成部分和子组成部分。该研究在巴西帕拉州（CZP）沿海地区第三区的案例研究中对该方法进行了测试。模拟考虑了安装不同规模TPP的情况。在ESI中，得分接近3的网站被认为不那么脆弱。ESI表现最佳的城市是方案I（2.7721）和方案II（2.126）的圣塞瓦斯蒂安达博阿维斯塔和方案III（1.9908）的苏尔。此外，ESI分析显示，第三区的小型潮汐水坝比中型和大型水坝更可行。与MCA集成的GIS的使用提供了一个有用的工具，可以分析不同的参数并可视化具有最大环境潜力的区域。MCA的复杂性，对专家意见的依赖以及加权系统的主观性都带来了挑战。此外，