首页|The role of waves in the resuspension and transport of fine sediment and mine tailings from the Fund?o Dam failure,Doce River,Brazil

The role of waves in the resuspension and transport of fine sediment and mine tailings from the Fund?o Dam failure,Doce River,Brazil

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
In one of the world's worst mining disasters,after flowing 670 km down the Doce River,about 20 million m3 of tailings reached the coast of Brazil in November 2015.The occurrence of persistent northerly winds favored the detachment of the river plume from the coastline and its displacement southward.However,observations of the sediment plume along the coast during the year following the breach,using aerial photographs,indicated that the plume is more extensive and persistent in a northerly direction.Previous studies have shown that although the most persistent winds are from the northern sector(70％),there is a greater incidence of waves from the southem sector(62％),especially with greater heights and periods.In this research,the effect of gravity waves on the transport of sediments is investigated,and,therefore,tailings from the Doce River and deposited on the adjacent inner continental shelf,mixed with the fluvial mud deposit also are investigated.Two mechanisms were investigated:1)the effect of waves on sedi-ment resuspension and their combination with tidal and wind forcings,using a two-dimensions in the horizontal directions(2DH)numerical model within the DELFT3D software,and 2)the capture of the fluvial plume by littoral drift,calculated by means of analytical models using data from wave propagation modeling.Both mechanisms were studied for 2019,also considering two major meteorological events in the region.Both effects were relevant for the northward dispersion of fine sediment,highlighting the effect of waves on the potential for northward transport of tailings towards the Abrolhos Bank.

Sediment plumeWavesLittoral driftDoce River

Susana Beatriz Vinzon、Marcos Nicolas Gallo、Mariela Gabioux、Diego Luiz Fonseca、Fernanda Minikowski Achete、Renato David Ghisolfi、Guilherme Nogueira Mill、Sabrina Aparecida Ramos da Fonseca、Valéria da Silva Quaresma、Kyssyanne Samihra Santos Oliveira、Guilherme Brigag?o、Léo Gon?alves Machado

展开 >

Cohesive Sediment Dynamics Laboratory(LDSC),Federal University of Rio de Janeiro,Rio de Janeiro,21941-909,Brazil

Department of Environmental Engineering,Federal Center for Technological Education Celso Suckow da Fonseca(CEFET/RJ),Rio de Janeiro,20271-204,Brazil

Laboratory of Oceanography,Department of Oceanography,Federal University of Espírito Santo,Vitória,29075-910,Brazil

Marine Geosciences Laboratory,Department of Oceanography,Federal University of Espírito Santo,Vitória,29075-910,Brazil

展开 >

Aquatic Biodiversity Monitoring Program-PMBA between Federal University of Espirito Santo,Funda??o Espirito-Santense de TecnBrazilian Council for Scientific and Technological Development(CNPq)for the research productivity scholarshipsBrazilian Council for Scientific and Technological Development(CNPq)for the research productivity scholarshipsPh.D.scholarship

001/201831029/2015-0308078/2019-5140233/2020-2

2024

10.1016/j.ijsrc.2023.09.004

国际泥沙研究(英文版)
国际泥沙研究培训中心

国际泥沙研究(英文版)

影响因子：0.337
ISSN：1001-6279
年,卷(期)：2024.39(1)