Biblioteca Digital de VanguardiaParameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina
In view of the water scarcity that affects the province of Mendoza, Argentina, information on reference crop evapotranspiration (ET0) is crucial for irrigation scheduling. Data that are not generally available is required for the determination of ET0, with the Penman-Monteith FAO56 equation (PM). Th...
| Autores principales: | , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
2018
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| Acceso en línea: | http://bdigital.uncu.edu.ar/11697 |
| _version_ | 1782342561075036160 |
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| author | Aguilera, Regina Maestre-Valero, José Francisco Martínez-Alvarez, Victoriano Gassmann, María Morábito, José |
| author_facet | Aguilera, Regina Maestre-Valero, José Francisco Martínez-Alvarez, Victoriano Gassmann, María Morábito, José |
| author_sort | Aguilera, Regina |
| collection | Repositorio |
| description | In view of the water scarcity that affects the province of Mendoza, Argentina, information
on reference crop evapotranspiration (ET0) is crucial for irrigation scheduling.
Data that are not generally available is required for the determination of ET0, with the
Penman-Monteith FAO56 equation (PM). The Hargreaves equation (HG), which only
requires air temperature data, represents an alternative to calculate ET0, after its local
or regional calibration with PM. In this paper, the Hargreaves equation was calibrated
locally by means of annual (Ca) and monthly (Cm,j) adjustment coefficients for the
northern oasis of Mendoza. Also, a regionalisation of the Ca was performed considering
environmental variables. The local adjustment with both coefficients made it possible to
correct the positive bias that indicated an overestimation of HG with respect to PM in 12
meteorological stations. The mean value of the root mean square error decreased from
0.80 mm day-1 to 0.57 mm day-1 with the Ca adjustment coefficient, and to 0.55 mm day-1
with the Cm,j adjustment coefficient, while the absolute error decreased from 0.63 to 0.42
and 0.39, respectively. Wind speed was the variable that best explained the regional
variability of the Ca (R2 = 0.64). |
| format | Artículo |
| id | uncu-11697 |
| institution | Biblioteca Digital - UNCUYO |
| language | Inglés |
| publishDate | 2018 |
| publisher | Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
|
| record_format | ojs |
| spelling | uncu-116972019-03-06T17:38:32Z Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina Parametrización de la ecuación de Hargreaves en el oasis norte de Mendoza, Argentina Aguilera, Regina Maestre-Valero, José Francisco Martínez-Alvarez, Victoriano Gassmann, María Morábito, José Mendoza (Argentina : provincia) Escasez hídrica Disponibilidad del agua Programación de riego Evapotranspiración Reference evapotranspiration Irrigation programming Hargreaves equation Water scarcity Adjustment coefficient Ecuación de Hargreaves In view of the water scarcity that affects the province of Mendoza, Argentina, information on reference crop evapotranspiration (ET0) is crucial for irrigation scheduling. Data that are not generally available is required for the determination of ET0, with the Penman-Monteith FAO56 equation (PM). The Hargreaves equation (HG), which only requires air temperature data, represents an alternative to calculate ET0, after its local or regional calibration with PM. In this paper, the Hargreaves equation was calibrated locally by means of annual (Ca) and monthly (Cm,j) adjustment coefficients for the northern oasis of Mendoza. Also, a regionalisation of the Ca was performed considering environmental variables. The local adjustment with both coefficients made it possible to correct the positive bias that indicated an overestimation of HG with respect to PM in 12 meteorological stations. The mean value of the root mean square error decreased from 0.80 mm day-1 to 0.57 mm day-1 with the Ca adjustment coefficient, and to 0.55 mm day-1 with the Cm,j adjustment coefficient, while the absolute error decreased from 0.63 to 0.42 and 0.39, respectively. Wind speed was the variable that best explained the regional variability of the Ca (R2 = 0.64). Ante la escasez hídrica atravesada por Mendoza, Argentina, es importante conocer la evapotranspiración referencia (ET0) de los cultivos para programar el riego. Su cálculo, a partir de la ecuación de Penman-Monteith FAO56 (PM), requiere contar con datos no disponibles en general. La ecuación de Hargreaves (HG), que solo requiere datos de temperaturas del aire, representa una alternativa para calcular ET0, luego de su calibración local o regional con PM. En este trabajo se calibró localmente la ecuación de Hargreaves por medio de coeficientes de ajuste anuales (Ca) y mensuales (Cm,j) para el oasis norte de Mendoza. También, se llevó a cabo una regionalización del Ca considerando las variables ambientales. El ajuste local con ambos coeficientes logró eliminar el sesgo positivo que indicaba una sobrestimación de HG con respecto a PM en las 12 estaciones meteorológicas consideradas. El valor promedio del error cuadrático medio disminuyó de 0,80 mm día-1 a 0,57 mm día-1 con el ajuste con Ca y a 0,55 mm día-1 con el uso de Cm,j, mientras que el error absoluto disminuyó de 0,63 a 0,42 y 0,39 respectivamente. La velocidad del viento fue la variable que mejor explicó la variabilidad regional del Ca (R2 = 0,64). Fil: Aguilera, Regina. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias Fil: Maestre-Valero, José Francisco. Universidad Politécnica de Cartagena (Murcia, España) Fil: Martínez-Alvarez, Victoriano. Universidad Politécnica de Cartagena (Murcia, España) Fil: Gassmann, María. Consejo Nacional de Investigaciones Científicas y Técnicas Fil: Morábito, José. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias 78 Revista de la Facultad de Ciencias Agrarias Vol. 50, no. 2 Revista de la Facultad de Ciencias Agrarias, Vol. 50, no. 2 2018-12-18 eng Inglés http://bdigital.uncu.edu.ar/11479 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar/ article info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias http://bdigital.uncu.edu.ar/11697 |
| spellingShingle | Mendoza (Argentina : provincia) Escasez hídrica Disponibilidad del agua Programación de riego Evapotranspiración Reference evapotranspiration Irrigation programming Hargreaves equation Water scarcity Adjustment coefficient Ecuación de Hargreaves Aguilera, Regina Maestre-Valero, José Francisco Martínez-Alvarez, Victoriano Gassmann, María Morábito, José Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina |
| title | Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina
|
| title_full | Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina
|
| title_fullStr | Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina
|
| title_full_unstemmed | Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina
|
| title_short | Parameterization of the Hargreaves equation in the northern oasis of Mendoza, Argentina
|
| title_sort | parameterization of the hargreaves equation in the northern oasis of mendoza, argentina |
| topic | Mendoza (Argentina : provincia) Escasez hídrica Disponibilidad del agua Programación de riego Evapotranspiración Reference evapotranspiration Irrigation programming Hargreaves equation Water scarcity Adjustment coefficient Ecuación de Hargreaves |
| url | http://bdigital.uncu.edu.ar/11697 |