Multicriteria Model for Prospective Locations for Sediment Dump Sites Coastal Dunes Management: Case Study from Barroquinha City, Northeast Brazil

Matheus Domingos Andrade De Sá, T. Gandra, Miguel da Guia Albuquerque, Davis Pereira de Paula, Marcelo de Oliveira Soares, E. L. Barros, R. Guerra, M. Leisner, Jade Moreira
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Abstract

Coastal zones are attractive for the development of economic interests (real estate and tourism) and are intensely occupied in a disorderly manner. Development in areas with available sediments can lead to conflicts between the natural movement of dunes and cities and communities and may result in burial processes. In addition, natural structures, such as dunes, play key roles in protecting against coastal erosion by balancing the beach-dune system with the sediment input, thus slowing the erosion process. This study aims to determine suitable areas for creating dune field dump sites in Barroquinha, Ceará, northeastern Brazil. The results showed that along the study area, the places with the greatest viability for creating dump sites were those furthest from the urban and permanent protection areas. In the stretch connecting Barroquinha City to the Bitupitá community on the CE-187 highway, 45 deposition points were monitored across five sectors under different environmental conditions. Sectors 2, 3, and 4 showed good responses to sediment fixation, in agreement with what was presented in the locational feasibility model. These results add to the discussion on urban infrastructure burying processes, making important contributions to urban planning and management in coastal areas. The results of this study will form an integral part of the Regional Contingency Plan for Incidents and/or situations of risk of environmental impacts in the coastal and/or oceanic zones of Ceará, which was conceived by the Chief Environment Scientist Program of Ceará State and contributes to the Action Plan against burying infrastructure by dune fields.
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沉积物倾倒场海岸沙丘管理前瞻性选址的多标准模型:巴西东北部巴罗基尼亚市案例研究
沿海地区对经济利益(房地产和旅游业)的发展具有吸引力,被无序地密集占用。在有可利用沉积物的地区进行开发,会导致沙丘的自然运动与城市和社区之间的冲突,并可能造成掩埋过程。此外,沙丘等自然结构通过平衡海滩-沙丘系统与输入的沉积物,在防止海岸侵蚀方面发挥着关键作用,从而减缓侵蚀过程。本研究旨在确定适合在巴西东北部塞阿拉州巴罗金哈创建沙丘堆放场的区域。研究结果表明,在研究区域内,距离城市和永久保护区最远的地方最有可能建立堆放场。在 CE-187 高速公路上连接巴罗金哈市和比图皮塔社区的路段,在不同环境条件下对五个区段的 45 个沉积点进行了监测。第 2、第 3 和第 4 区对沉积物固定的反应良好,与定位可行性模型中的结果一致。这些结果为有关城市基础设施掩埋过程的讨论增添了新的内容,为沿海地区的城市规划和管理做出了重要贡献。这项研究的结果将成为塞阿拉州首席环境科学家计划制定的《塞阿拉州沿海和/或海洋地区环境影响事故和/或风险情况区域应急计划》的一个组成部分,并有助于制定防止沙丘掩埋基础设施的行动计划。
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