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首页> 外文OA文献 >Estudo da dinâmica costeira da região da foz do rio Piranhas-Açu para geração de mapas de sensibilidade do litoral ao derramamento de óleo
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Estudo da dinâmica costeira da região da foz do rio Piranhas-Açu para geração de mapas de sensibilidade do litoral ao derramamento de óleo

机译：研究Piranhas-Açu河口区域的海岸动力学，以绘制海岸对溢油敏感性的地图

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The study area is located in the northern coast of Rio Grande do Norte State comprising the mouth of Açu-Piranhas river including the cities of Porto do Mangue e Areia Branca. The local geological setting comprises Cretaceous, Tertiary and Quaternary geological units of the Potiguar Basin. One is about a region of high morphologic instability due to action of the rigorous dynamic coastal processes, beyond the intense human activities mainly for the performance of the petroliferous industry, salt farms and tanks of shrimp industry.For the accomplishment of this work Landsat 5 TM and Landsat 7 ETM + from four distinct dates were used as cartographic base, in which one applied techniques of digital processing to elaborate thematic maps of the existing natural resources to support the geologic and geomorphologic characterization and the soil and landuse maps. The strategy applied was the interpretation of multitemporal images from aerial and orbital remote sensors alIied to the terrain truth recognition, integrated through a Geographic Information System. These activities had alIowed the production of Sensitivity Maps of the Coast to Oil Spilling for the area, on the basis of the Coastal Sensibility Index. Taking into account the seasons were created maps to distinct datas: July 2003 represents the winter months that presented a sensibility lower when compared with the month of December 2003. For the summer months greater sensitivity is due to the hydrodynamic data that suggest a lesser capacity of natural cleanness of the oil and its derivatives in spilling case.These outcomes are an important and useful database to support an assessment to a risk situation and to taking decision in the face of an environmental disaster with oil spilling in coastal area, alIowing a complete visualization of the area and identifying all portions in the area with thei environmental units and respective Coastal Sensibility Index.
机译：研究区域位于北里奥格兰德州北部海岸，包括Açu-Piranhas河的河口，包括Porto do Mangue e Areia Branca市。当地的地质环境包括波蒂瓜盆地的白垩纪，第三纪和第四纪地质单元。一个是关于由于严格的动态沿海过程的作用而导致的形态高度不稳定的区域，除了人类的主要活动以外，主要是为石油工业，盐场和虾类工业的表现。为此，Landsat 5 TM的完成和来自四个不同日期的Landsat 7 ETM +被用作制图基础，其中一种应用数字处理技术来详细说明现有自然资源的专题图，以支持地质和地貌特征以及土壤和土地利用图。应用的策略是通过地理信息系统集成来自航空和轨道遥感器的多时相影像，这些影像与地形真相识别相关。这些活动已允许根据海岸敏感度指数生成该海岸到该地区漏油的敏感度图。考虑到季节，创建了映射到不同数据的地图：2003年7月代表的冬季月份与2003年12月相比，敏感性较低。在夏季月份，较高的敏感性是由于水动力数据表明，该季节的容量较小。石油及其衍生物在泄漏情况下的自然清洁度。这些结果是一个重要而有用的数据库，可支持对风险情况进行评估，并在面对沿海石油泄漏造成的环境灾难时做出决策，从而实现完整的可视化区域，并用环境单位和相应的海岸敏感性指数识别该区域的所有部分。

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