ASABE Technical Library - Abstract

Click on “Download PDF” for the PDF version or on the title for the HTML version.
If you are not an ASABE member or if your employer has not arranged for access to the full-text, view access and subscription options

The Daily Erosion Project - Incorporating Wind Erosion

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Soil Erosion Research Under a Changing Climate, January 8-13, 2023, Aguadilla, Puerto Rico, USA  .(doi:10.13031/soil.23064)
Authors:   Grace Wilson, Brian Gelder, Brent Dalzell, Daryl Herzmann, David Mulla
Keywords:   Daily erosion project, Modeling, Soil erosion, SWEEP, WEPS, Wind erosion

Abstract.

The Daily Erosion Project (DEP) enables daily estimation of sheet and rill erosion across a large area in the US Midwest. However, DEP currently omits a potentially important source of erosion in the region by not considering wind erosion. In the work outlined here, we incorporated wind erosion into DEP by linking it with the Single-event Wind Erosion Evaluation Program (SWEEP). In this new integrated model known as DEP-SWEEP (Figure 1), daily predictions are made for rill, sheet, and wind erosion from farm fields in the US Midwest, given differing land-cover, weather, and land management conditions. Daily wind erosion estimates can be generated for one year‘s worth of climate and management conditions in DEP-SWEEP. Some parameters from DEP are used directly as input parameters into SWEEP (e.g. soil textural parameters), however others (including soil surface and aggregate parameters) needed to be calculated. Equations used in these calculations were based primarily on the theoretical processes of the NRCS‘s Wind Erosion Prediction (WEPS) model. Other important calculations added to the DEP-SWEEP model allow for estimation of residue and growing plant and plant biomass cover. Initially, DEP-SWEEP was run for three Hydrologic Unit Code 12 (HUC12) watershed test sites located in Nebraska and Minnesota on a daily basis for the year 2021. Soil types for these HUC12s included silty-loam and sandy-loam soils, and all HUC12s were planted in a corn-soybean crop rotation, with high-mulch tillage, and no wind barriers present. Results of these simulations showed realistic calculation of some soil surface parameters; however, wind erosion was only generated in one HUC 12 on one day. This result may not be representative of actual conditions given poor calculation of some key soil aggregate parameters. Additional planned work on the DEP-SWEEP model includes updating algorithms to account for climate and management practices for soil aggregate parameters, parameterization to allow for simulation of more field management practices, and simulation of more HUC12s in the US Midwest region.

(Download PDF)    (Export to EndNotes)