Hourly Grass Evapotranspiration in Modified Maritime Environment
Publication: Journal of Irrigation and Drainage Engineering
Volume 121, Issue 6
Abstract
The Penman method using hourly and daily weather data was evaluated to estimate daily reference evapotranspiration over a well-established stand of Alta fescue under different atmospheric conditions. The performance of the Penman equation was evaluated using evapotranspiration measured by the Bowen ratio energy balance (BREB) method. Good agreement between the BREB method and Penman using hourly weather data was observed. On an hourly basis, the overall standard error of estimate (SEE) and absolute relative error (ARE) were 0.06 mmh −1 (40.8 Wm −2 ) and 5.2%, respectively. On a daily basis, the SEE was 0.55 mmd −1 and the ARE was 6.9%. The SEE and ARE for the Penman model using daily weather data were 0.74 mmd −1 and 9.8%, respectively. These results suggest that the accuracy of the Penman equation could improve if hourly weather data were used as inputs and strongly suggest that the Penman equation with hourly weather data could be used in the Willamette Valley to predict daily evapotranspiration for irrigation purposes.
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References
1.
Angus, D. E., and Watt, P. J.(1984). “Evapotranspiration—how good is the Bowen ratio method?”Agric. Water Mgmt., 8, 133–150.
2.
Brutsaert, W. (1982). Evaporation in the atmosphere: theory, history, and applications . D. Reidel, Publ. Co., Boston, Mass.
3.
Brutsaert, W., and Sugita, M.(1992). “Regional surface fluxes under non uniform soil moisture conditions during drying.”Water Resour. Res., 28(6), 1669–1674.
4.
Cuenca, R. H. (1989). Irrigation system design: an engineering approach . Prentice-Hall, Englewood Cliffs, N.J.
5.
“Evapotranspiration and irrigation water requirements.” (1990). ASCE manual and reports on engineering practice, No. 70, M. E. Jensen, R. D. Burman, and R. G. Allen, eds., ASCE, New York, N.Y.
6.
Garrat, J. R.(1984). “The measurement of evapotranspiration by meteorological methods.” Agric. Water Mgmt., 8, 99–117.
7.
Nie, D., Flitcraft, I. D., and Kanemasu, E. T.(1992). “Performance of the Bowen ratio system on a slope.”Agric. and Forest Meteorology, 59, 165–181.
8.
Oke, T. R. (1987). “Boundary-layer climates.” Methuen and Company, London, England.
9.
Ortega-Farias, S. O. (1991). “Analysis of evapotranspiration by the Bowen ratio, Penman, and hydrologic balance methods,” M.S. thesis, Oregon State Univ., Corvallis, Oreg.
10.
Pieri, P., and Fuch, M.(1990). “Comparison of Bowen ratio and aerodynamic estimates of evapotranspiration.”Agric. and Forest Meteorology, 49, 243–256.
11.
Pruitt, W. O., and Doorenbos, J. (1977). “Empirical calibration a requisite for evapotranspiration formulae based on daily or longer mean climatic data.”Int. Round Table Conf. on Evapotranspiration, Int. Comm. on Irrig. and Drain., Budapest, Hungary.
12.
Pruitt, W. O., Swan, B. D., Held, A., Sutton, B., Matista, A., and Hsiao, T. C. (1987). “Bowen ratio and Penman: Australian-California tests.”Proc., Irrig. and Drain. Spec. Conf., ASCE, New York, N.Y., 149–158.
13.
Rosenberg, N. J., Blad, B. L., and Verma, S. B. (1983). Microclimate: the biological environment . John Wiley and Sons, New York, N.Y.
14.
Snyder, R., and Pruitt, W. O. (1985). “Estimating reference evapotranspiration with hourly data.”California Irrig. Mgmt. Info. Systems Final Rep., R. Snyder, D. W. Henderson, W. O. Pruitt, and A. Dog, eds., Univ. of California, Davis, Calif., VII-1–VII-3.
15.
Sugita, M., and Brutsaert, W.(1991). “Daily evaporation over a region from lower boundary layer profiles measured with radiosondes.”Water Resour. Res., 27, 747–752.
16.
Weiss, R. L.(1982). “A quantitative approach to the Pruitt and Doorenbos version of the Penman equation.”Irrig. Sci., 4, 267–275.
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Copyright © 1995 American Society of Civil Engineers.
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Published online: Nov 1, 1995
Published in print: Nov 1995
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