Simple ET0 Forms of Penman’s Equation without Wind and/or Humidity Data. II: Comparisons with Reduced Set-FAO and Other Methodologies

@article{Valiantzas2013SimpleEF,
  title={Simple ET0 Forms of Penman’s Equation without Wind and/or Humidity Data. II: Comparisons with Reduced Set-FAO and Other Methodologies},
  author={John D. Valiantzas},
  journal={Journal of Irrigation and Drainage Engineering-asce},
  year={2013},
  volume={139},
  pages={9-19}
}
  • J. Valiantzas
  • Published 2013
  • Environmental Science
  • Journal of Irrigation and Drainage Engineering-asce
AbstractIn the companion paper, a set of simplified formulas was derived to approximate the Penman equation for estimating reference evapotranspiration (ET0) from limited data. The first suggested formula is explicit for routinely measured data: air temperature, solar radiation, relative humidity, and wind velocity. Simplifications of this formula were made for places where wind speed and/or relative humidity data are not available. The performance of the new derived formulas was tested under… 

Simple ET 0 Forms of Penman's Equation without Wind and/or Humidity Data. I: Theoretical Development

AbstractIn this paper, new algebraic expressions are derived for estimating reference evapotranspiration (ET0) from limited meteorological data. Reference evapotranspiration is commonly computed from

Performance of the FAO Penman-Monteith equation under limiting conditions and fourteen reference evapotranspiration models in southern Manitoba

Evapotranspiration is a key component of water and energy balance. An accurate estimate of reference evapotranspiration (ETo) is important for determining the water demand of field crops, water

Evaluation of FAO-56 Penman-Monteith Model with Limited Data and the Valiantzas Models for Estimating Grass-Reference Evapotranspiration in Sahelian Conditions

AbstractAccurate determination of grass-reference evapotranspiration (ETo) is very important for agricultural, hydrological, and environmental studies, especially under increasing water scarcity and

FAO-56 Penman-Monteith Daily from Linear Regression Calibrated Hargreaves Equation with Wind Terms in Tropics with Limited Data

  • E. Kra
  • Environmental Science
  • 2014
Hargreaves equation (HG), which lacks a wind speed () term, was modified, through a linear regression calibration method, into LHGu which has terms and is useful for quickly computing practically accurate estimates of FPM for varying daily where only temperature data are available.

Comparison of Different Empirical Methods for Estimating Daily Reference Evapotranspiration in Mediterranean Climate

AbstractThe estimation of reference evapotranspiration (ET0) is very important for the management of water resources and the determination of the water budget, especially under arid conditions. The

Historical developments of models for estimating evaporation using standard meteorological data

Evaporation plays a key role in the hydrology of a catchment. World‐wide actual terrestrial evaporation is approximately two third of terrestrial precipitation. Evaporation is the focus of this study

Comparison of sum-of-hourly and daily time step standardized ASCE Penman-Monteith reference evapotranspiration

The objective of this study was to quantify differences associated with using 24-h time step reference evapotranspiration (ETo), as compared with the sum of hourly ETo computations with the

ESTIMATION AND COMPARISON OF POTENTIAL EVAPOTRANSPIRATION BASED ON DAILY AND MONTHLY DATA FROM SPERCHIOS VALLEY IN CENTRAL GREECE

There is no golden rule concerning the optimal equations to estimate reference potential evapotranspiration (PETref) under various climates because even in the same climatic type, different studies

References

SHOWING 1-10 OF 16 REFERENCES

Simple ET 0 Forms of Penman's Equation without Wind and/or Humidity Data. I: Theoretical Development

AbstractIn this paper, new algebraic expressions are derived for estimating reference evapotranspiration (ET0) from limited meteorological data. Reference evapotranspiration is commonly computed from

Simplified Reference Evapotranspiration Formula Using an Empirical Impact Factor for Penman’s Aerodynamic Term

AbstractRecently, a simple algebraic formula, equivalent in accuracy to the Penman equation, was derived for computing evapotranspiration from readily available measured data. The derivation of the

An evaluation of common evapotranspiration equations

Abstract A comparison is made between the Pruitt and Doorenbos version of an hourly Penman-type equation, the Food and Agriculture Organization (FAO) hourly Penman-Monteith equation, and an

Comparison of Some Reference Evapotranspiration Equations for California

Four reference evapotranspiration (ETo) equations are compared using weather data from 37 agricultural weather stations across the state of California. The equations compared include the California

Discussion of "Case Study on the Accuracy and Cost/Effectiveness in Simulating Reference Evapotranspiration in West-Central Florida" by Michael Grant Exner-Kittridge and Mark Cable Rains

John D. Valiantzas Professor, Div. of Water Resource Management, Dept. of Natural Resources and Agricultural Engineering, Agricultural Univ. of Athens, 75 Iera Odos, 11855, Athens, Greece. E-mail:

STANDARDIZED ASCE PENMAN-MONTEITH: IMPACT OF SUM-OF-HOURLY VS. 24-HOUR TIMESTEP COMPUTATIONS AT REFERENCE WEATHER STATION SITES

The standardized ASCE Penman-Monteith (ASCE-PM) model was used to estimate grass-reference evapotranspiration (ETo) over a range of climates at seven locations based on hourly and 24 h weather data.

History and Evaluation of Hargreaves Evapotranspiration Equation

A brief history of development of the 1985 Hargreaves equation and its comparison to evapotranspiration (ET) predicted by the Food and Agricultural Organization of the United Nations (FAO)

Natural evaporation from open water, bare soil and grass

  • H. L. Penman
  • Environmental Science
    Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1948
It is shown that a satisfactory account can be given of open water evaporation at four widely spaced sites in America and Europe, the results for bare soil receive a reasonable check in India, and application of theresults for turf shows good agreement with estimates of evapolation from catchment areas in the British Isles.

New Evapotranspiration Crop Coefficients

Improved crop coefficients for various Pacific Northwest irrigated crops were developed for estimating crop evapotranspiration (ET) from estimates or measurements of reference ET. Reference ET was