Publicado 12 números por año
ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508
Indexed in
PREDICTION OF THE RETENTION VOLUME OF SEDIMENT DURING WATER-BASED SEDIMENT INJECTION
SINOPSIS
The aim of this study is to propose a model for describing the pressure changes due to the retention of sediment (organic matter adsorbed on fines, diameter range 1−100 µm) inside saturated sand beds. Such model makes it possible to predict the retention volume of sediment, which is useful for considering the biodiversity of tidal flats. On the basis of Poiseuille's law and the hydraulic radius concepts, two models could theoretically be proposed to predict the pressure drop in the absence or presence of sediment retention. From one of the proposed models, the retention volume of sediment is determined, and is verified by comparing the predictions with experimental data. It was found that the friction coefficient determined based on the proposed model was in good agreement with that determined from the measured pressure drop, suggesting that the measured pressure drop can be reproduced by the proposed model. Moreover, the retention volume predicted by the proposed model well matches the measured retention weight. It was found that the properties of organic matter bonded onto sediment particles strongly affected the retention behavior of sediment. Sediment that is absorbed by decomposed organic matter travels more easily through sand beds, resulting in a low reduction of permeability.
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Touch Narong, Hibino Tadashi, Nakaoka Takayuki, Nagatsu Yoshiyuki, Measurement of Sediment Retention in a Sandy Tidal Flat Based on Pressure Drop Model, Transport in Porous Media, 102, 1, 2014. Crossref
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Touch Narong, Hibino Tadashi, Nakashita Shinya, Permeability Reduction by Sediment Retention in Saturated Sand Columns, Transport in Porous Media, 98, 3, 2013. Crossref