Show simple item record

dc.contributor.author Dikinya, O.
dc.contributor.author Lehmann, P.
dc.contributor.author Hinz, C.
dc.contributor.author Aylmore, G.
dc.date.accessioned 2010-06-08T10:12:21Z
dc.date.available 2010-06-08T10:12:21Z
dc.date.issued 2008
dc.identifier.citation Dikinya, O. et al (2008) Using a pore-scale model to quantify the effect of particle re-arrangement on pore structure and hydraulic properties, Hydrological Processes, Vol. 21, pp. 989-997 en_US
dc.identifier.issn 0885 6087
dc.identifier.uri http://hdl.handle.net/10311/490
dc.description.abstract A pore-scale model based on measured particle size distributions has been used to quantify the changes in pore space geometry of packed soil columns resulting from a dilution in electrolyte concentration from 500 to 1 mmol l 1 NaCl during leaching. This was applied to examine the effects of particle release and re-deposition on pore structure and hydraulic properties. Two different soils, an agricultural soil and a mining residue, were investigated with respect to the change in hydraulic properties. The mining residue was much more affected by this process with the water saturated hydraulic conductivity decreasing to 0Ð4% of the initial value and the air-entry value changing from 20 to 50 cm. For agricultural soil, there was little detectable shift in the water retention curve but the saturated hydraulic conductivity decreased to 8Ð5% of the initial value. This was attributed to localized pore clogging (similar to a surface seal) affecting hydraulic conductivity, but not the microscopically measured pore-size distribution or water retention. We modelled the soil structure at the pore scale to explain the different responses of the two soils to the experimental conditions. The size of the pores was determined as a function of deposited clay particles. The modal pore size of the agricultural soil as indicated by the constant water retention curve was 45 μm and was not affected by the leaching process. In the case of the mining residue, the mode changed from 75 to 45 μm. This reduction of pore size corresponds to an increase of capillary forces that is related to the measured shift of the water retention curve. en_US
dc.language.iso en en_US
dc.publisher Wiley http://www.interscience.doi.wiley.com/10.1002/hyp.6299 en_US
dc.subject pore structure en_US
dc.subject particle size distribution en_US
dc.subject particle re-arrangement en_US
dc.subject hydraulic properties en_US
dc.subject saturated hydraulic conductivity en_US
dc.subject soil water retention en_US
dc.title Using a pore-scale model to quantify the effect of particle re-arrangement on pore structure and hydraulic properties en_US
dc.type Published Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search UBRISA


Advanced Search

Browse

My Account