WEPP Soil Erosion Model Adjustment for an Abruptic Argiudoll and a Vertic Argiudoll in Uruguay

  • Gabriella Jorge Departamento de Suelos y Aguas, Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
  • Mario Pérez Bidegain Departamento de Suelos y Aguas, Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
  • Jose Terra Instituto Nacional de Investigación Agropecuaria, INIA-Uruguay
  • Jorge Sawchik Instituto Nacional de Investigación Agropecuaria, INIA-Uruguay
Keywords: simulation, erosion, models, calibration of sensitive parameters

Abstract

Erosion estimation models are helpful tools for planning sustainable agriculture systems. The model Water Erosion Prediction Project (WEPP) estimates rill and interrill erosion, as well as sediment load and deposition, including temporal and spatial distribution. This enables the estimation of both in-site and off-site effects such as deposition in water bodies, making it useful for environmental studies. Although this model is based on the physical processes that occur in the soil, site-specific adjustments are needed. The aim of this study was to adjust the WEPP model for the representative Uruguayan agriculture soils of the West coast and East rolling plains. We used the data base of the runoff plots from INIA La Estanzuela y Palo a Pique, and we compared erosion values estimated with WEPP and those estimated with USLE/RUSLE, in terms of annual means. In addition, erosion estimated with WEPP was compared with the data measured at an annual scale. WEPP estimated erosion with high precision in both sites, comparable to USLE (R2=0.97 y 0.98 respectively). A Nash-Sutcliffe value of 0.92 indicates a very good performance. To continue this research line, measures of local soil physical variables or the development of alternative pedotransfer equations will be needed.

Published
2015-06-01
How to Cite
1.
Jorge G, Pérez Bidegain M, Terra J, Sawchik J. WEPP Soil Erosion Model Adjustment for an Abruptic Argiudoll and a Vertic Argiudoll in Uruguay. Agrociencia Uruguay [Internet]. 1Jun.2015 [cited 10Jul.2020];19(1):84-3. Available from: http://agrocienciauruguay.uy/ojs/index.php/agrociencia/article/view/324
Section
Soil and Water