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| Web URL(s): | http://elibrary.asabe.org/azdez.asp?JID=3&AID=27999&CID=t1995&v=38&i=6&T=2&redirType=
Last checked: 10/13/2015
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Dabney, S. M.;
Meyer, L. D.;
Harmon, W. C.;
Alonso, C. V.;
Foster, G. R. |
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| Author Affiliation: | ASAE Member, Agronomist; ASAE Fellow Engineer, Agricultural Engineer, retired (Collaborator); Hydraulic Engineer; Hydraulic Engineer; ASAE Member Engineer, Hydraulic Engineer and Director, National Sedimentation Laboratory, USDA-Agricultural Research Service, Oxford, Mississippi. |
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| Title: | Depositional patterns of sediment trapped by grass hedges |
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| Source: | Transactions of the American Society of Agricultural Engineers. Vol. 38, No. 6, November/December 1995, p. 1719-1729. |
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| Publishing Information: | St. Joseph, MI |
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| # of Pages: | 11 |
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| Keywords: | TIC Keywords: Cultivar evaluation; Hedgerows; Runoff control; Sediment control; Variety trials
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| Abstract/Contents: | "Stiff-grass hedges can resist, retard, and disperse concentrated flows of runoff; trap suspended sediment; and reduce ephemeral gully development. Flume experiments were conducted at a 5% grade using several combinations of four grass species, four types of sediment, and eight flow rates ranging from 0.33 to 2.66 m3/min-m. Sediment trapping resulted primarily from depostion in the backwater upstream of the grass, rather than by filtration in the grass. Sediment was initially deposited 1 to 2 m downslope from a hydraulic jump transition that formed at the upper edge of the backwater. From this position, a delta of sediment mostly coarser than 125 μm grew back toward the hydraulic jump until flow depth became shallow enough that bedload transport was initiated and the delta began to advance toward the grass. In the flow zone across the delta, slope steepness approached 1 to 2% and the flow was near critical depth. A steady-state model was developed that describes sediment trapping in the backwater area as a settling process controlled by sediment characteristics, flow rate, and backwater depth at the grass. This model underpredicted trapping of fine sediment and overpredicted trapping of coarse sediment in situations where the delta neared the grass." |
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| Language: | English |
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| References: | 29 |
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| Note: | Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dabney, S. M., L. D. Meyer, W. C. Harmon, C. V. Alonso, and G. R. Foster. 1995. Depositional patterns of sediment trapped by grass hedges. Trans. Proc. Am. Soc. Agric. Eng. 38(6):p. 1719-1729. |
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| Web URL(s):
http://elibrary.asabe.org/azdez.asp?JID=3&AID=27999&CID=t1995&v=38&i=6&T=2&redirType=
Last checked: 10/13/2015
Requires: PDF Reader |
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MSU catalog number: S 671 .A452 |
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