Results 251 to 260 of about 512,638 (310)

Effect of ice cover roughness on local scour around bridge piers. [PDF]

Sci Rep
Dong S, Zhang Z, Wang J, Sui J.
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Salivary fluoride bioavailability after application of fluoride varnishes: A randomized clinical study. [PDF]

Braz Dent J
Lopes MSS, Rezende LVM, Paz EC, Campos G.   +3 more
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New Total Sediment‐Load Sampler

Journal of Hydraulic Engineering, 1992
A new total sediment-load sampler is designed and tested in a flume. The new instrument consists of a bed-load sampler and a suspended-load sampler, both attached to a supporting frame. The suspended-load sampler consists of seven intake nozzles, which are connected to plastic hoses and operated by pumps.
Leo C. Van Rijn, Moustafa T. K. Gaweesh
openaire   +1 more source

Total PCBs in Liverpool Bay sediments

Marine Environmental Research, 1996
The concentrations of 55 congeners of PCBs were determined in < 500 μm particles of 66 superficial sediment samples from Liverpool Bay. Total PCBs were significantly (p < 0.001) correlated with the amount of fine particles (r2 = 0.81) and with the organic carbon content (r2 = 0.80).
V.F. Camacho-Ibar, J. McEvoy
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Relationship between sediment clay minerals and total mercury

Journal of Environmental Science and Health, Part A, 2011
A group of 262 sediment samples were collected from various lakes, rivers, reservoirs, and bayous of Louisiana. All samples were analyzed for total mercury. Twenty nine of the samples with total mercury content ranging from 11 to 401 ppb (μg/kg) were analyzed for clay minerals and other sediment physical and chemical properties.
Manoch, Kongchum, Wayne H, Hudnall, R D, DeLaune   +2 more
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Determination of total mercury in sediments and soils

The Analyst, 1972
A highly sensitive and precise procedure has been developed for the quantitative determination of total mercury in sediments and soils. Undried samples are treated with concentrated nitric and sulphuric acids, potassium permanganate and potassium persulphate in order to digest and oxidise all forms of mercury to mercury (II) ions, which are ...
I K, Iskandar, J K, Syers, L W, Jacobs, D R, Keeney, J T, Gilmour   +4 more
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Total sediment discharge sampling over sills

Water Resources Research, 1974
Easily installed wooden sills permit collection of bed load sediment normally missed in the ‘unsampled zone.’ Sills also (1) provide a rigid unchanging control at which to sample, (2) reduce the chance of sample bias from sediment stirred up by the wader, and (3) permit control of the sampling interval because the sample points can be marked directly ...
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A Simple Total Sediment Load Formula

World Environmental and Water Resources Congress 2013, 2013
Prediction of total sediment load has been a challenge to river engineers for decades. Two approaches are typically used: One is to directly calculate the total sediment load from measured flow and sediment properties, and the other is to separate total sediment load into bed load and suspended load and calculate them independently.
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The Total Sediment Load of Streams

Journal of the Hydraulics Division, 1958
Relationships proposed give both quantity and quality of total, suspended, and bed loads as functions of stream and sediment characteristics; in process of empirically defining relationships, encouraging correlation of laboratory and field data was obtained. (25 refs.)
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Two-Dimensional Total Sediment Load Model Equations

Journal of Hydraulic Engineering, 2008
An unsteady total load equation is derived for use in depth-averaged sediment transport models. The equation does not require the load to be segregated a priori into bed and suspended but rather automatically switches to suspended load, bed load, or mixed load depending on a transport mode parameter consisting of local flow hydraulics.
Blair Greimann, Yong Lai, Jianchun Huang
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