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Quantitative appraisal of naturalistic/anthropic shoreline shifts for hurghada: Egypt

机译:赫尔格达自然/人为海岸线变化的定量评估: 埃及

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Abstract This investigation aims to establish a system to test the identification of shoreline changes along the coast of Hurghada. Besides, the Digital Shoreline Analysis System (DSAS) studies the shoreline shift rate analysis. Multi-temporal satellite images have revealed accretion and erosion patterns in the areas of concern. Landsat images with different periods were geometrically and radiometrically corrected, then classified through assigning 8 different classes for the quantitative coastline delineation analysis from 1987 to 2019: (Landsat 5–TM, Thematic Mapper (TM)), Landsat7 ETM+, worldview 2, and Sentinel 2). To detect both land use and land cover change (LULCC) and shoreline growth, a maximum controlled classification tool is used. The DSAS was used to measure the coastal changing rate as a powerful statistical analysis tool, and thus to predict the behavior of the coastal shift over a long time. DSAS used two separate methods: EPR and LRR. The results concluded that, primarily as a consequence of unregulated landfill practices before tourist facilities, Hurghada's coastal region experienced an average accretion rate of 1.38 m/y. Moreover, the El-Gouna study revealed drastic modifications because of the development of its coastal zone's closed inland lagoons. Finally, the creation of the decision matrix reveals the evolution of the shorelines in the three last decades and the statistical projection for the three next decades. This study highlights the problem of extreme erosion in the Southern part (which is still not completely developed).
机译:摘要 本调查旨在建立一个系统来测试赫尔格达沿海海岸线变化的识别。此外,数字海岸线分析系统(DSAS)研究了海岸线移动率分析。多时相卫星图像揭示了有关地区的吸积和侵蚀模式。对不同时期的Landsat影像进行几何和辐射校正,然后通过分配8个不同的类别进行分类,用于1987-2019年的定量海岸线划定分析:(Landsat 5–TM,专题制图器(TM)),Landsat7 ETM+,worldview 2和Sentinel 2。为了检测土地利用和土地覆被变化 (LULCC) 和海岸线生长,使用了最大受控分类工具。DSAS作为一种强大的统计分析工具,用于测量海岸变化率,从而预测长期海岸变化的行为。DSAS使用了两种不同的方法:EPR和LRR。结果得出的结论是, 主要是由于旅游设施之前不受管制的垃圾填埋场做法, 赫尔格达的沿海地区经历了 1.38 m/y.此外,El-Gouna的研究显示,由于其沿海地区封闭的内陆泻湖的发展,发生了剧烈的变化。最后,决策矩阵的创建揭示了过去三十年海岸线的演变以及未来三十年的统计预测。这项研究突出了南部的极端侵蚀问题(尚未完全开发)。

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