Evaluating WEPP predicted on-field furrow irrigation erosion

Evaluando el WEPP de Predicción en Erosión de irrigación en Surcos en el Campo

Bjorneberg, D.L. and Trout, T.J. (2002) Evaluating WEPP predicted on-field furrow irrigation erosion. pp. 693-698. 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.

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Abstract

The Water Erosion Prediction Project (WEPP) model
has the ability to predict erosion from furrow-irrigated
fields. A previous evaluation showed that WEPP-predicted
infiltration and soil loss correlated poorly with
field measurements. Our objective was to further
evaluate the WEPP model for furrow irrigation by
comparing on-field distribution of measured and
predicted infiltration, runoff and soil loss. We used data
from three fields with Portneuf silt loam (coarse-silty,
mixed, superactive, mesic Durinodic Xeric Haplocalcids)
near Kimberly, ID. Single-event WEPP simulations were
used so predicted erosion could be evaluated without the
effects of daily model adjustments to effective hydraulic
conductivity, critical shear and rill erodibility. Single-event
simulations showed that the model could only
adequately predict infiltration and runoff within a field
when effective hydraulic conductivity was calibrated for
each irrigation. However even with accurate furrow
flows, the WEPP model could not adequately predict
sediment detachment, transport, and deposition within a
field. Comparing measured and predicted on-field
distribution of soil loss indicated that transport capacity
was over-predicted by the model because deposition was
only predicted when detachment was greatly over-predicted.
More thorough investigation of the WEPP
model programming and more detailed furrow erosion
field data are needed to develop an accurate simulation
model for furrow irrigation erosion.

Item Type:	Conference or Workshop Item (Paper)
NWISRL Publication Number:	1065
Additional Information:	also published on CD-ROM
Subjects:	Irrigation > Furrow irrigation > Erosion Soil > Erosion Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:56
Last Modified:	14 Nov 2016 15:52
Item ID:	891
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/891