{"title":"Macumba 和 Recreio-Barra da Tijuca 沙滩(巴西东南部,里约热内卢)沿岸沉积物长距离迁移率的估计值","authors":"Breylla Campos Carvalho , Josefa Varela Guerra","doi":"10.1016/j.ijsrc.2024.03.005","DOIUrl":null,"url":null,"abstract":"<div><p>Due to the complex nature of coastal dynamics, several models were developed to estimate longshore sediment transport (LST) rates. The Coastal Engineering Research Center (CERC), Kamphuis, and Bayram models are among the most used and were applied to three east–west oriented sandy urban beaches from Rio de Janeiro (southeastern Brazil): Macumba, Recreio, and Barra da Tijuca. The wave record from oceanographic buoys and the WaveWatch III (WW3) model were used to identify fairweather periods and increased storminess between 2016 and 2018. Eastwards, median sediment grain-size grades from coarse to medium sand, and is associated with decreasing beach slopes in the same direction. The magnitude of the estimated LST rates varied significantly between the models (<em>Δ</em> ≈ 1,000 m<sup>3</sup>/day, <em>p</em> < 0.001), although the time-averaged LST rates obtained from the four models indicate eastward transport. The four models identified areas of convergence and divergence of sediment transport with increasing rates to the east. The modeling results may support effective coastal management initiatives when integrated with topographic profiles, numerical modeling, satellite imagery, and historical information.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 3","pages":"Pages 317-326"},"PeriodicalIF":3.5000,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000301/pdfft?md5=9643ca11881cf5804f517fe7c5532e99&pid=1-s2.0-S1001627924000301-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Estimates of longshore sediment transport rates along Macumba and Recreio-Barra da Tijuca sandy beaches (Rio de Janeiro, southeastern Brazil)\",\"authors\":\"Breylla Campos Carvalho , Josefa Varela Guerra\",\"doi\":\"10.1016/j.ijsrc.2024.03.005\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Due to the complex nature of coastal dynamics, several models were developed to estimate longshore sediment transport (LST) rates. The Coastal Engineering Research Center (CERC), Kamphuis, and Bayram models are among the most used and were applied to three east–west oriented sandy urban beaches from Rio de Janeiro (southeastern Brazil): Macumba, Recreio, and Barra da Tijuca. The wave record from oceanographic buoys and the WaveWatch III (WW3) model were used to identify fairweather periods and increased storminess between 2016 and 2018. Eastwards, median sediment grain-size grades from coarse to medium sand, and is associated with decreasing beach slopes in the same direction. The magnitude of the estimated LST rates varied significantly between the models (<em>Δ</em> ≈ 1,000 m<sup>3</sup>/day, <em>p</em> < 0.001), although the time-averaged LST rates obtained from the four models indicate eastward transport. The four models identified areas of convergence and divergence of sediment transport with increasing rates to the east. The modeling results may support effective coastal management initiatives when integrated with topographic profiles, numerical modeling, satellite imagery, and historical information.</p></div>\",\"PeriodicalId\":50290,\"journal\":{\"name\":\"International Journal of Sediment Research\",\"volume\":\"39 3\",\"pages\":\"Pages 317-326\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-03-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1001627924000301/pdfft?md5=9643ca11881cf5804f517fe7c5532e99&pid=1-s2.0-S1001627924000301-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Sediment Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1001627924000301\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Sediment Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1001627924000301","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
由于沿岸动力学的复杂性,开发了多种模型来估算沿岸沉积物输运(LST)速率。海岸工程研究中心 (CERC)、Kamphuis 和 Bayram 模型是使用最多的模型之一,它们被应用于里约热内卢(巴 西东南部)的三个东西向城市沙滩:这些模型适用于里约热内卢(巴西东南部)的三个东西向城市沙滩:Macumba、Recreio 和 Barra da Tijuca。海洋浮标的波浪记录和波浪观测 III(WW3)模型被用来识别 2016 年至 2018 年期间的风调雨顺期和风暴增加期。向东,沉积物粒度中值从粗沙逐渐变为中沙,并与同一方向的海滩坡度减小有关。尽管从四个模型中得到的时间平均 LST 速率表明向东迁移,但各模型之间估计的 LST 速率大小差异很大(≈ 1,000 米/天,< 0.001)。这四个模式确定了沉积物运移的汇聚区和发散区,运移速率向东增加。这些模式的结果与地形剖面图、数值模式、卫星图像和历史资料相结合,可为有效的沿岸管理措施提供支持。
Estimates of longshore sediment transport rates along Macumba and Recreio-Barra da Tijuca sandy beaches (Rio de Janeiro, southeastern Brazil)
Due to the complex nature of coastal dynamics, several models were developed to estimate longshore sediment transport (LST) rates. The Coastal Engineering Research Center (CERC), Kamphuis, and Bayram models are among the most used and were applied to three east–west oriented sandy urban beaches from Rio de Janeiro (southeastern Brazil): Macumba, Recreio, and Barra da Tijuca. The wave record from oceanographic buoys and the WaveWatch III (WW3) model were used to identify fairweather periods and increased storminess between 2016 and 2018. Eastwards, median sediment grain-size grades from coarse to medium sand, and is associated with decreasing beach slopes in the same direction. The magnitude of the estimated LST rates varied significantly between the models (Δ ≈ 1,000 m3/day, p < 0.001), although the time-averaged LST rates obtained from the four models indicate eastward transport. The four models identified areas of convergence and divergence of sediment transport with increasing rates to the east. The modeling results may support effective coastal management initiatives when integrated with topographic profiles, numerical modeling, satellite imagery, and historical information.
期刊介绍:
International Journal of Sediment Research, the Official Journal of The International Research and Training Center on Erosion and Sedimentation and The World Association for Sedimentation and Erosion Research, publishes scientific and technical papers on all aspects of erosion and sedimentation interpreted in its widest sense.
The subject matter is to include not only the mechanics of sediment transport and fluvial processes, but also what is related to geography, geomorphology, soil erosion, watershed management, sedimentology, environmental and ecological impacts of sedimentation, social and economical effects of sedimentation and its assessment, etc. Special attention is paid to engineering problems related to sedimentation and erosion.