alluvial sediment


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Noun1.alluvial sediment - clay or silt or gravel carried by rushing streams and deposited where the stream slows downalluvial sediment - clay or silt or gravel carried by rushing streams and deposited where the stream slows down
delta - a low triangular area of alluvial deposits where a river divides before entering a larger body of water; "the Mississippi River delta"; "the Nile delta"
placer - an alluvial deposit that contains particles of some valuable mineral
sediment, deposit - matter that has been deposited by some natural process
alluvial soil - a fine-grained fertile soil deposited by water flowing over flood plains or in river beds
References in periodicals archive ?
They interweave elements of his life story, strongly influenced by his physicist father Albert Einstein, with technical aspects of his chosen research field--the transport of alluvial sediment by flowing water--and with discussions of how that transport affects rivers and the interactions of humans with rivers.
These effects are also attenuated further downstream by contributions of sediment and flow from unregulated tributaries [45, 48] or buffered by alluvial sediment stores [49].
--The fourth deformational event has occurred form pliocene until Quaternary, the evidence of this event are: starting of Kahurak fault activity in the study area, displacement of streams and old fold axes, bending of the Nosratabad faulttrend in the north of the area, folding of Pliocene units and cutting of Quaternary alluvial sediment.
In addition, the field pH data presented refer to a single type of landform unit where parent material is alluvial sediment; this has advantages and drawbacks as discussed.
The objectives of this study were 1) to examine the spatio-temporal distribution patterns of OCPs in water, soil and alluvial sediment of selected areas within these watersheds, 2) to ascertain whether concentrations exceeded established water and sediment quality criteria, and 3) to examine the impact of various factors on pollution levels.
Prior to dredging, the bed materials were composed primarily of alluvial sediment deposits, and the buildup of organic matter resulting from decay of plants and algae that grew in the ditches.
Erosional events result in the accumulation of alluvial sediment at the base of the side slope.
Band rationing technique was usedfor the study such as false color composite band ratio used for identifying lithological features ofthe study area.Laki Formation (limestone, Marl and Calcareous Shale rocks) is indicated by reddish yellow to pale yellow color; the Tiyon Formation (shale, Nodular Limestone and Limestone) is indicated by reddish brown to pale green color; the Nari Formation (Limestone, sandstones and shale) is indicated by light brownish green to dark green color; Khirtar Formation (shale, limestone and marl) is indicated by reddish brown to light green color, (Manchar Formation Sandstone and pebbly Conglomerate) is indicated by light blue and reddish brown, while the alluvial sediments and recent deposits) are indicated by light purple, pale green and reddish brown color.
The Upper Pleistocene alluvial terrace deposits of the Quaternary alluvial sediments of the Alto Guadalquivir Basin (SE Spain) provide an excellent example of how geomorphological evolution can exert an important control on mineral and geochemical signatures of sediments in a tectonically active area (Baena 1993; Garcia-Tortosa et al., 2008).
Organic carbon percent varied widely in these hetereogenous alluvial sediments. Mean organic carbon content was 4.1 [+ or -] 2.0% by mass for post-settlement alluvium.