Bashar Al-Barri
Ghent University
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Publication
Featured researches published by Bashar Al-Barri.
Journal of Environmental Radioactivity | 2018
Nick Ryken; Bashar Al-Barri; Will Blake; Alex Taylor; Filip Tack; E. Van Ranst; Samuel Bodé; Pascal Boeckx; Ann Verdoodt
Beryllium-7 (7Be) has been used as a sediment tracer to evaluate soil redistribution rates at hillslopes and as a tool to estimate sediment residence time in river systems. A key assumption for the use of 7Be as a sediment tracer is the rapid and irreversible sorption of 7Be upon contact with the soil particles. However, recent studies have raised questions about the validity of these assumptions. Seven soil types were selected to assess the adsorption rate of 7Be on the soil particles, subsequently an extraction experiment was performed to assess the rate of desorption. Next, different treatments were applied to assess the impact of soil pH, fertilizer, humic acid and organic matter on the adsorption of Be. Finally, the influence of regularly occurring cations present on the soil complex on the adsorption of Be on pure clay minerals was evaluated. The adsorption rate experiment showed a rapid and nearly complete sorption of Be for Luvisols and Cambisols under agriculture. For a temperate climate Stagnosol under forest and two highly weathered tropical Ferralsols sorption of Be was less rapid and less complete. This may result in an incomplete adsorption of 7Be on these three soils when runoff initiates, which could lead to an overestimation of erosion rates and sediment residence time. Additional observations were made during the extraction experiment, showing a significant loss of Be from the forest Stagnosol and a stable binding of Be to the arable soils. Of the different treatments applied, only pH showed to be of influence. Finally, Ca2+ and NH4+ on the soil complex had only a limited effect on the adsorption of Be, while Al3+ in combination with a low pH inhibits the adsorption of Be on the exchange complex of the pure clay minerals. All these findings more rigorously support the use of 7Be as a soil redistribution tracer in arable soils in a temperate climate at a hillslope scale. The use of 7Be in highly weathered Ferralsols or forest rich environments should be limited to avoid overestimations of erosion rates. The spatially extended use of 7Be to evaluate residence times of sediments should be avoided in catchments with rapid changing environmental parameters as they might influence the sorption behavior of 7Be.
European Journal of Agronomy | 2015
Victoria Nelissen; Greet Ruysschaert; Delphine Manka’Abusi; Tommy D’Hose; Kristof De Beuf; Bashar Al-Barri; Wim Cornelis; Pascal Boeckx
Journal of Hydrology | 2016
Meisam Rezaei; Piet Seuntjens; Reihaneh Shahidi; Ingeborg Joris; Wesley Boënne; Bashar Al-Barri; Wim Cornelis
Geoderma | 2016
Nick Ryken; Bashar Al-Barri; Alex Taylor; Will Blake; Peter Maenhout; Steven Sleutel; Filip Tack; Manuel Dierick; Samuel Bodé; Pascal Boeckx; Ann Verdoodt
Land Degradation & Development | 2016
Emmanuel Opolot; Tesfay Araya; Jan Nyssen; Bashar Al-Barri; Koen Verbist; Wim Cornelis
Soil & Tillage Research | 2018
Nick Ryken; T. Vanden Nest; Bashar Al-Barri; Will Blake; Alex Taylor; Samuel Bodé; Greet Ruysschaert; Pascal Boeckx; Ann Verdoodt
Geoderma | 2018
Nick Ryken; Bashar Al-Barri; Will Blake; Alex Taylor; Filip Tack; Samuel Bodé; Pascal Boeckx; Ann Verdoodt
The EGU General Assembly | 2015
Nick Ryken; Bashar Al-Barri; Will Blake; Alex Taylor; Pascal Boeckx; Ann Verdoodt
The EGU General Assembly | 2014
Nick Ryken; Bashar Al-Barri; Will Blake; Alex Taylor; Pascal Boeckx; Ann Verdoodt
Young Soil Scientists Day 2013, Book of abstracts | 2013
Nick Ryken; Bashar Al-Barri; Pascal Boeckx; Ann Verdoodt