INVESTIGADORES
BUSCHIAZZO Daniel Eduardo
artículos
Título:
Effect of temporal resolution of wind data on wind erosion prediction with the Revised Wind Erosion Equation (RWEQ).
Autor/es:
PANEBIANCO, J.E.; BUSCHIAZZO, D.E.
Revista:
Ciencia del Suelo
Editorial:
ASOCIACIÓN ARGENTINA DE LA CIENCIA DEL SUELO
Referencias:
Lugar: Buenos Aires; Año: 2013 vol. 31 p. 189 - 199
ISSN:
0326-3169
Resumen:
In wind erosion modelling, wind speed is a central variable because the wind energy is the driving force of the erosion process. Wind erosion models were generally validated and tested at the field level using high temporal resolution wind speed records. However, available records for large regions of the world generally show relatively low temporal resolution. The effect of using wind data of different temporal resolution in RWEQ discrete and continuous versions was assessed. Wind erosion was measured in a 1 ha square field surrounded by a non erodible boundary during 82 high wind events occurring between 2005 and 2008. Simulated and measured erosion values were compared. For wind erosion simulation during discrete periods, the model was loaded with on site measured wind speed data averaged in 5 minutes and 1 hour intervals. For continuous simulation, a weather file for RWEQ/97 was developed and Weibull factors were calculated using both hourly and daily wind speeds. When the discrete version of RWEQ was used with hourly wind speeds instead of five minute averages, the total simulated soil loss during the 82 events was reduced by 44%. The model efficiency was not significantly affected by wind speed data resolution. RWEQ continuous version loaded with monthly Weibull parameters calculated using hourly wind speeds, calculated zero erosion. Monthly Weibull distribution scale factors calculated using daily wind speeds were reduced by 32% on average with respect to hourly data Increasing the Weibull scale parameter by up to 50% slightly improved the monthly simulated erosion rates.