Estimation of reference evapotranspiration in a mountainous mediterranean site using the Penman-Monteith equation with limited meteorological data
DOI:
https://doi.org/10.3989/pirineos.2009.v164.27Keywords:
Reference evapotranspiration, Penman-Monteith, Hargreaves, data scarcity, parameter estimation, Spanish PyreneesAbstract
In recent decades many authors have adopted the Penman- Monteith formula as the standard way to estimate reference evapotranspiration from climate data. The main drawback associated with the Penman-Monteith method is the relatively high data demand: temperature, solar radiation, relative humidity and wind speed are the minimum inputs required by the formula. In the Spanish Pyrenees historical databases usually consist of temperature and rainfall only, although an improvement in data acquisition is expected in terms of parameters monitored. Under situations of data scarcity, some authors recommend the use of less data intensive methods, such as the empirical Hargreaves equation. Other authors suggest that it is better to estimate the missing parameters and to apply the Penman-Monteith equation. This paper presents a study on the accuracy of the Penman-Monteith method for a situation where some parameters have to be estimated from available temperature, and wind speed data must be replaced by a constant value. The results have been compared with the information available for a location in the central Spanish Pyrenees (period 1999-2003) where parameters required by the Penman-Monteith method have been monitored. A comparison is then made with the Hargreaves model in order to assess the most appropriate method for calculation of the reference evapotranspiration. The results indicate that the use of the Penman-Monteith formula results in errors in reference evapotranspiration ETo estimation of different magnitude and sign throughout the year. However, in general, it offers a more accurate estimation of reference evapotranspiration than the Hargreaves formula.
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References
Allen, R.G., Smith, M., Perrier, A. & Pereira, L.S. (1994). An update for the definition of reference evapotranspiration. ICID Bulletin 43: 1-34.
Allen, R.G., Pereira, L.S., Raes, D. & Smith, M. (1998). Crop evapotranspiration. Guidelines for computing crop water requirements. Irrigation and Drainage Paper No. 56, FAO, Rome, Italy.
Amatya, D.M., Skaggs, R.W. & Gregory, J.D. (1995). Comparison of methods for estimating REF-ET. J.Irrig.Drain.Eng 121 (6): 427-435. doi:10.1061/(ASCE)0733-9437(1995)121:6(427)
Beguería, S., López-Moreno, J.I., Seeger, M. & García- Ruiz, J.M. (2003). Assessing the effects of climate oscillations and land-use changes on streamflow in the Central Spanish Pyrenees. Ambio 32 (4): 283-286.
Castellvi, F. (2001). A new simple method for estimating monthly and daily solar radiation. Performance and comparison with other methods at Lleida (NE Spain); a semiarid climate. Theor. Appl. Climatol 69: 231-238. doi:10.1007/s007040170028
Christiansen, J.E. & Worlton, L. (1998). Reduced set evapotranspiration station. Irrig. J. 48 (5) : 12-14.
Choisnel E. De Viellele O. & Lacroze F. (1992). Une approche uniformisée du calcul de l’evapotranpiration potentialle pour l’ensamble des pays de la Communautés Européene. Publication EUR 14223, Office des Publications Officielles des Communauté Européene, Luxembourg.
Del Barrio, G., Creus, J. & Puigdefábregas, J. (1990). Thermal seasonality of the high mountain belts of the Pyrenees. Mountain Research and Development 10: 227-233. doi:10.2307/3673602
Droogers, P. & Allen, R.G. (2002). Estimating reference evapotranspiration under inaccurate data conditions. Irrigation and Drainage Systems 16: 33-45. doi:10.1023/A:1015508322413
Gallart, F. & Llorens, P. (2004). Observations on land cover changes and water resources in the headwaters of the Ebro Catchment, Iberian Peninsula. Physics and Chemistry of the Earth 29: 769-773.
García-Ruiz, J.M., Puigdefábregas, J. & Creus, J. (1985). Los recursos hídricos superficiales del Alto Aragón. Ed. Instituto de Estudios Altoaragoneses. Huesca, 224 p.
García-Ruiz, J.M., Beguería S., López-Moreno J.I., Lorente A. & Seeger M. (2001). Los recursos hídricos superficiales del Pirineo aragonés y su evolución reciente. Ed. Geoforma eds. Logroño, 192 p.
Hargreaves, G.H., Samani, Z.A. (1985). Reference crop evapotranspiration from temperature. Appl. Eng. Agric. 1 (2): 96-99.
Hargreaves, G.L. & Hargreaves, G.H., Riley, J.P. (1985). Irrigation water requirements for Senegal River Basin. Journal of Irrigation and Drainage Engineering 113: 265-275. doi:10.1061/(ASCE)0733-9437(1985)111:3(265)
Hargreaves, G.H. & Allen, R.G. (2003). History and Evaluation of Hargreaves Evapotranspiration Equation. Journal of Irrigation and Drainage Engineering 129: 53-63. doi:10.1061/(ASCE)0733-9437(2003)129:1(53)
Hess, T.M. (2000). WaSimET - Reference Evapotranspiration Program [V1.3]. Cranfield University, UK. Available from http://www.silsoe.cranfield.ac.uk/iwe/expertise/irrigagr.htm#Software
Itenfisu, D., Elliott, R.L., Allen, R.G. & Walter, I.A. (2000). Comparison of reference evapotranspiration calculations across a range of climates. Proceedings of the 4th National Irrigation Symposium, ASAE, Phoenix, AZ, Nov., 2000.
Jensen, M.E., Burman, R.D. & Allen, R.G., 1990. Evapotranspiration and Irrigation water requirements. ASCE Manuals and Reports on Engineering Practice. Nº70, 360 p.
Kimball, J.S., Running, S.W. & Nemani, R. (1997). An improved method for estimating surface humidity from daily minimum temperature. Agricultural and Forest Meteorology 85: 87-98. doi:10.1016/S0168-1923(96)02366-0
Llasat, M.C. & Snyder, R.L. (1998). Data error effects on net radiation and evapotranspiration estimation. Agricultural and Forest Meteorology 91: 209-221. doi:10.1016/S0168-1923(98)00070-7
Martinez-Cob A. (2002). Infraestimación de la evapotranspiración potencial con el método de Thornwaite en climas semiáridos. La información climática como herramienta de gestión ambiental. VII Reunión nacional de climatología. Cuadrat J.M., Vicente S.M. and Saz M.A. (eds). Universidad de Zaragoza, Zaragoza: 195 p.
Martinez-Cob A. & Tejero-Juste M. (2004). A wind-based qualitative calibration of the Hargreaves ETo estimation equation in semiarid regions. Agricultural Water Management 64: 251-264. doi:10.1016/S0378-3774(03)00199-9
Sanchez Toribio, M.I. (1992). Métodos para el estudio d la evaporación y evapotranspiración. Cuadernos Técnicos de la S.E.G. 3, Ed. Geoforma Eds. Logroño: 36p.
Stöckle, C.O., Kjelgaard, J. & Bellochi, G. (2004). Evaluation of estimated weather data for calculating Penman-Monteith reference crop evapotranspiration. Irrig. Sci. 23: 39-46. doi:10.1007/s00271-004-0091-0
Supit, I. & Van Kappel, R.R. (1998). A simple method to estimate global radiation. Solar Energy 63: 147-160. doi:10.1016/S0038-092X(98)00068-1
Supit, I., Van Der Goot, E. (eds). (2003). Updated system description of the WOFOST crop growth simulation model as implemented in the Crop Growth Monitoring System applied by the European Commission. Treebook 7. Treemail Publishers, Heelsum: 120pp.
Tsanis, I.K. & Naoum, S. (2003). The effect of spatially distributed meteorological parameters on irrigation and water demand assessment. Advances in Water Resources 26: 311-324. doi:10.1016/S0309-1708(02)00100-8
Willmott, C.J. (1982). Some comments on the evaluation of model performance. Bulletin American Meteorological Society 63 (11): 1309-1313. doi:10.1175/1520-0477(1982)063<1309:SCOTEO>2.0.CO;2
Xu C.Y. & Singh V.P. (1998). Dependence of evaporation on meteorological variables at different time-scales and intercomparison of estimation methods. Hydrological Processes 12: 429-442. doi:10.1002/(SICI)1099-1085(19980315)12:3<429::AID-HYP581>3.0.CO;2-A
Xu C.Y. & Singh V.P. (2001). Evaluation and generalization of temperaturebased methods for calculating evaporation. Hydrological Processes 15: 305-319. doi:10.1002/hyp.119
Xu C.Y. & Singh V.P. (2002). Cross comparison of empirical equations for calculating potential evapotranspiration with data from Switzerland. Water Resources Management 16: 197-219. doi:10.1023/A:1020282515975
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