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首页> 外文期刊>Ocean & coastal management >Erosion in Buenos Aires province: Coastal-management policy revisited
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Erosion in Buenos Aires province: Coastal-management policy revisited

机译：布宜诺斯艾利斯省的水土流失：重新审视沿海管理政策

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摘要

As the Buenos Aires Province coastline is dominated by a longshore transport from south to north, obstructions performed at the beginning of the 20th century originated the width reduction of some beaches. Fields of groins were constructed without a master plan; therefore, more obstructions caused a dramatic decrease in the longshore sand supply. These defense alternatives were only applied in the counties of the southeast of the province (General Pueyrredon, General Alvarado, Mar Chiquita), close to the quarries, and with resistant abrasion platforms. Northern beaches (Villa Gesell, Pinamar and Partido de la Costa), on the other hand, are natural with a dissipative morphodynamics. Where the coastal route is close to active diffs, riprap structures were constructed parallel to the coastline. Today, the southeastern coast remains with the higher erosion rates of the Buenos Aires coastline. With the aim of aerial and satellite photographs, and images, erosion rates were calculated. In order to analyze the success of coastal defenses, comparisons were established according to two intervals: 1960-1980, and 1980-2008. Defense structures have contributed to the decrease in the erosion rates in some areas; in other areas, the rates have increased due to the drift obstruction. In some critic areas, and considering present erosion rates, future positions of the coastline were simulated for the next 20-30 years. At the same time, there are new unexpected problems derived from a project to construct detached breakwaters that were not completed, and considering jetties that were constructed without a previous impact -assessment analysis. (C) 2017 Elsevier Ltd. All rights reserved.
机译：由于布宜诺斯艾利斯省的海岸线以从南到北的长岸运输为主，因此20世纪初的障碍物导致一些海滩的宽度减小。腹股沟田地的建设没有总体规划。因此，更多的障碍物导致了近岸砂供应的急剧减少。这些防御措施仅适用于该省东南部的县（Pueyrredon将军，Alvarado将军，Mar Chiquita将军），靠近采石场且具有抗磨平台。另一方面，北部海滩（Villa Gesell，Pinamar和Partido de la Costa）是自然的，具有耗散的形态动力学。在沿海路线靠近活跃差异区的地方，沿岸线平行建造了翻录结构。时至今日，东南海岸仍然具有布宜诺斯艾利斯海岸线较高的侵蚀率。针对航空和卫星照片以及图像，计算了腐蚀速率。为了分析海防的成功与否，根据两个时间间隔进行了比较：1960-1980年和1980-2008年。防御结构导致某些地区侵蚀率降低；在其他地区，由于漂移的阻碍，比率增加了。在一些批评地区，考虑到目前的侵蚀率，模拟了未来20-30年海岸线的未来位置。同时，从建设尚未完成的独立防波堤的项目中产生新的意想不到的问题，并考虑了没有事先进行影响评估分析而建造的码头。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Ocean & coastal management》 |2018年第4期|107-116|共10页
  • 作者

    Ignacio Isla Federico; Cortizo Luis; Merlotto Alejandra; Bertola German; Pontrelli Albisetti Melisa; Finocchietti Cecilia;

  • 作者单位

    Inst Invest Marinas & Costeras UNMDP CONICET, Inst Geol Costas & Cuaternario UNMDP CIC, Mar Del Plata, Buenos Aires, Argentina;

    Inst Invest Marinas & Costeras UNMDP CONICET, Inst Geol Costas & Cuaternario UNMDP CIC, Mar Del Plata, Buenos Aires, Argentina;

    Inst Invest Marinas & Costeras UNMDP CONICET, Inst Geol Costas & Cuaternario UNMDP CIC, Mar Del Plata, Buenos Aires, Argentina;

    Inst Invest Marinas & Costeras UNMDP CONICET, Inst Geol Costas & Cuaternario UNMDP CIC, Mar Del Plata, Buenos Aires, Argentina;

    Inst Invest Marinas & Costeras UNMDP CONICET, Inst Geol Costas & Cuaternario UNMDP CIC, Mar Del Plata, Buenos Aires, Argentina;

    Inst Invest Marinas & Costeras UNMDP CONICET, Inst Geol Costas & Cuaternario UNMDP CIC, Mar Del Plata, Buenos Aires, Argentina;

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