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Densities of Wet Aggregated Sediment from Different Textured Soils
Author(s) -
Rhoton F. E.,
Meyer L. D.,
Whisler F. D.
Publication year - 1983
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1983.03615995004700030036x
Subject(s) - loam , soil water , sediment , soil science , bulk density , soil texture , geology , aggregate (composite) , hydrology (agriculture) , volume (thermodynamics) , environmental science , mineralogy , geotechnical engineering , geomorphology , materials science , composite material , physics , quantum mechanics
The density of wet aggregated sediment is a major factor controlling its fluvial transport and deposition. Since this property varies depending on the volume of aggregate pores filled with water, the use of dry aggregate densities in sediment transport studies may result in significant underestimations of wet sediment densities and consequently overestimations of transport distances. Therefore, this study was conducted to measure the densities of wet aggregates that exist during fluvial transport of sediment from agricultural soils. Samples from six soils, ranging in texture from silty clay to sandy loam, were wetted and agitated to simulate the stresses of raindrop impact. Two size ranges (1.00 to 0.50, and 0.50 to 0.25 mm) were collected from this sediment by wet sieving, then drained at a suction of 50 cm of water and weighed. The sediment volume was measured to the nearest 0.05 mL in a displacement vessel. Wet aggregate densities approximated 2.0 Mg/m 3 and varied little among soils, or between the two size ranges. No variations in aggregate density could be directly attributed to differences in aggregate textures.