Journal Paper

Paper Information

video

sound

Persian Version

View:

140

Download:

0

Cites:

Information Journal Paper

Title

TEMPERATURE AND RADIATION BASED METHODS AGAINST THE STANDARD FAO PENMAN- MONTEITH FOR ESTIMATING THE REFERENCE EVAPOTRANSPIRATION (ET0) IN GORGAN

Pages

 Start Page 359 | End Page 369

Abstract

 The FAO Penman- Monteith (F-P-M) method is now broadly accepted as the standard for estimating the reference evapotranspiration (ET0). The method is also now used for evaluating the temperature-based [BLANEY-CRIDDLE (B-C) and HARGREAVES-SAMANI (H-S)] and radiation-based [Jensen-Haise (J-H) and TURC.(Tc)] methods. The objective was to compare the ET0 estimated by the B-C, H-S, J-H, Tc methods with that estimated by the F-P-M method in a SEMIARID CLIMATE using the meteorological data recorded in Hashem-Abad Agro-Meteorological Station, Gorgan. The mean value of ET0 was 3.13 mm.day-1 using the F-P-M method. At daily scale, Tc method showed the lowest RMSE (Root Mean Square Error), 0.98 mm.day-1. At monthly scale, in compare to the other methods, the RMSE values by Tc method were lower in April as well as from September to March, averaged 0.06 mm.day-1 with the percentage error of 3%. During the summer season, July and August, however, B-C method suggested the lowest RMSE value than those of the others (RMSE 0.32 mm.day-1 with the percentage error of 6%). The H-S method behaves the best for monthly estimation (RMSE 0.42 mm.day-1, the percentage error of 7%) during May to June. The F-P-M method for estimating ET0 requires data often not recording in the meteorological stations; hence ET0 should be estimated using the proposed simpler methods in compare to the F-P-M. The adaptation of the methods to different climates should be essentially tested by the standard F-P-M method.

Cites

  • No record.
  • References

  • No record.
  • Related Journal Papers

    Related Seminar Papers

  • No record.
  • Related Plans

  • No record.
  • Recommended Workshops






    File Not Exists.