Hydraulic modeling of irrigation-induced furrow erosion

Modelo de irrigación Hidraulica de Erosion Inducida en Surcos

Strelkoff, Theodor S. and Bjorneberg, David L. (2002) Hydraulic modeling of irrigation-induced furrow erosion. pp. 699-705. In: Stott, D.E. and Mohtar, R.H. and Steinhardt, G.C. (eds.) Proc. 10th International Soil Conservation Organization Meeting. Sustaining the Global Farm (2001). USA-IN-West Lafayette (Purdue University / USDA-ARS National Soil Erosion Research Lab), 1999/05/24-29.

	PDF 1067.pdf Download (533kB)
	PDF ES_1067.pdf Download (11kB)

Abstract

In the experimental Version 4.xx series, erosion
science is introduced into the surface-irrigation
simulation model, SRFR. The hydraulics of water flow in
furrows for individual irrigation events is predicted by
numerical solution of the unsteady equations of mass and
momentum conservation coupled to generally applicable
empirical equations describing infiltration and soil
roughness and to a known furrow configuration and
inflow hydrograph. Selection of appropriate field values
for the infiltration and roughness coefficients yields
infiltration distributions and surface flows (including
runoff) in reasonable agreement with measurements. The
erosion component consists in applying the simulated
hydraulic flow characteristics to site-specific empirical
determinations of soil erodibility, to general empirical
sediment-transport relations, and to general physically
based deposition theory to provide estimates of soil
erosion, flux, and deposition at various points along the
furrow as functions of time. Total soil loss off the field
and ultimate net erosion and deposition along the furrow
follow. At this initial stage of the investigations, a single
representative aggregate size is assumed adequate for the
analysis. Results are compared to measurements of
sediment concentrations in the furrow quarter points
and in the tailwater. For a given representative aggregate
size, the results are heavily dependent on the choice of
transport formula. The Laursen (1958), Yang (1973), and
Yalin (1963) formulas are programmed for investigation,
as are a variety of computational options. Preliminary
comparisons suggest the superiority of the Laursen
formulation, with the Yang and Yalin formulas
significantly over-predicting transport.

Item Type:	Conference or Workshop Item (Paper)
NWISRL Publication Number:	1067
Additional Information:	also published on CD-ROM
Subjects:	Irrigation > Furrow irrigation > Erosion Soil > Erosion Research methodology Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:56
Last Modified:	14 Nov 2016 15:48
Item ID:	893
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/893