摘要：Riparian plants exert flow resistance and largely influence the
flow structure, which affects erosion, deposition and transport processes of
fine sediments. Predicting these vegetative effects is important for flood,
sediment and nutrient management. However, predictions on the fate of
sediments are complicated by uncertainties associated with the suitable
parameterization of natural plants and the associated effects on the turbulent
flow field and on the variables in the transport equations. The aim of this
study is to quantify deposition and transport of fine sandy sediment in a
partly vegetated channel under laboratory conditions. Care was taken to
reproduce conditions typical of vegetated floodplain flows including dense
flexible grassy understory as a starting point. The experiments were
conducted in a flume that is specifically designed to recirculate fine
sediment. We measured suspended sediment concentrations with optical
turbidity sensors and determined patterns of net deposition over the
vegetated parts of the cross section. The flow field was determined with
acoustic Doppler velocimetry. Our investigations are intended to improve
future predictions of fine sediment storage and transport in natural or
constructed vegetated channels, and the first results reported herein were
useful in designing further, on-going experiments with complex
combinations of vegetation and channel geometry. Key words: sediment
transport, suspended sediment, deposition, riparian vegetation, flow field.
其他摘要：Riparian plants exert flow resistance and largely influence the flow structure, which affects erosion, deposition and transport processes of fine sediments. Predicting these vegetative effects is important for flood, sediment and nutrient management. However, predictions on the fate of sediments are complicated by uncertainties associated with the suitable parameterization of natural plants and the associated effects on the turbulent flow field and on the variables in the transport equations. The aim of this study is to quantify deposition and transport of fine sandy sediment in a partly vegetated channel under laboratory conditions. Care was taken to reproduce conditions typical of vegetated floodplain flows including dense flexible grassy understory as a starting point. The experiments were conducted in a flume that is specifically designed to recirculate fine sediment. We measured suspended sediment concentrations with optical turbidity sensors and determined patterns of net deposition over the vegetated parts of the cross section. The flow field was determined with acoustic Doppler velocimetry. Our investigations are intended to improve future predictions of fine sediment storage and transport in natural or constructed vegetated channels, and the first results reported herein were useful in designing further, on-going experiments with complex combinations of vegetation and channel geometry. Key words: sediment transport, suspended sediment, deposition, riparian vegetation, flow field.
其他关键词：sediment transport, suspended sediment, deposition, riparian vegetation, flow field."> Journals Books Conferences EDPS Account Login All issues Series Forthcoming About Search Menu Browse All issues Forthcoming Series About the journal Aims and scope Indexed in Publishing Policies & Ethics Published by For conference organizers For authors News All open access proceedings journals BIO Web of Conferences ITM Web of Conferences MATEC Web of Conferences E3S Web of Conferences SHS Web of Conferences EPJ Web of Conferences Client testimonials Contact Request a quote Advanced Search jQuery(function ($) { var source = function (request, callback) { var term = request.term; $.ajax({ url: ';index.php', dataType: 'json', method: 'GET', data: { option: 'com_solr', task: 'auto_complete', query: term }, success: function (data) { var suggestions = []; try { data.suggest.default[term].suggestions.forEach(function (s) { suggestions.push(s.term)}) } catch (e) { } callback(suggestions); }, error: function (err) { callback([]); } }); }; $('#search').find('input[name=q]').autocomplete({ source: source }); }); All issues Volume 40 (2018) E3S Web Conf., 40 (2018) 02016 Abstract Browse All issues Forthcoming Series About the journal Aims and scope Indexed in Publishing Policies & Ethics Published by For conference organizers For authors News All open access proceedings journals BIO Web of Conferences ITM Web of Conferences MATEC Web of Conferences E3S Web of Conferences SHS Web of Conferences EPJ Web of Conferences Client testimonials Contact Request a quote Open Access Issue E3S Web Conf. Volume 40, 2018 River Flow 2018 - Ninth International Conference on Fluvial Hydraulics Article Number 02016 Number of page(s) 8 Section River morphodynamics and restoration DOI https:;;doi.org;10.1051;e3sconf;20184002016 Published online 05 September 2018 E3S Web of Conferences 40 , 02016 (2018) Transport and deposition of fine sediment in a channel partly covered by flexible vegetation Walter Box * , Kaisa Västilä and Juha Järvelä
