Evaluation of Class A Pan Coefficients for Estimating Reference Evapotranspiration in Humid Location

Irmak, Suat; Haman, Dorota Z.; Jones, J. W.

doi:10.1061/(asce)0733-9437(2002)128:3(153)

Cited by 87 publications

(42 citation statements)

References 6 publications

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“…Evaporation pans [Class A pan, U.S. Weather Bureau (USWB)] are used extensively throughout the world to measure free-water evaporation and to estimate reference evapotranspiration (ET o ) (Irmak et al, 2002) However, reliable estimation of ET o using pan evaporation (Epan) depends on the accurate determination of pan coefficients (Kpan). Thus an attempt is made in this study to apply the SEBS algorithm to estimate Kpan values.…”

Section: The Surface Energy Balance System (Sebs) For Estimation Of Amentioning

confidence: 99%

Application Of A Remote Sensing Technique In Estimating Evapotranspiration For Nyazvidzi Sub- Catchment., Zimbabwe

Ncube

Zhakata

Muchandiona

2016

ESJ

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The integration of Remote Sensing and ground data into hydrological and cropwater requirement models enables water resources managers to adequately quantify the availability of water for irrigation in space and time. The SEBS algorithm was used to derive actual evapotranspiration estimates using MODIS images to assess cropwater requirements in the Ruti irrigation scheme after validation with ground based evapotranspiration measurements. Results show that actual evapotranspiration computed using SEBS (ET o S) were comparable to those obtained using Penman Monteith method (R 2 =0.96). The Kendall's tau test showed that there is significant statistical association (α = 0.05) between Pan Coefficient (K p ) values determined using ET o S and ET o PM and K p values from the Snyder equation. In conclusion, the study highlights the potential use of GIS and remote sensed data for catchment management, planning and irrigation scheduling at irrigation scheme level. Welch's t test showed that there is no evidence to reject H o : K p determined from ET o PM -K p from ET o S = 0. The above is crucial in the evaluation and comparison of performance of different irrigation systems in the country for food security and improvement of livelihoods in the light of integrated water resources management.

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Section: The Surface Energy Balance System (Sebs) For Estimation Of Amentioning

confidence: 99%

Application Of A Remote Sensing Technique In Estimating Evapotranspiration For Nyazvidzi Sub- Catchment., Zimbabwe

Ncube

Zhakata

Muchandiona

2016

ESJ

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“…This method does not require numerous climatic parameters, and represents the comparison between evaporation from a pan with water and evapotranspiration from grass, and the pan coefficient (Kp) is used for that purpose [1]. Furthermore, reliable estimation of ET0 using pan evaporation (Epan) depends on the accurate determination of Kp [2]. Doorenbos and Pruitt (1977) proposed the values for Kp for various ground cover types surrounding the pan [1].…”

Section: Introductionmentioning

confidence: 99%

“…There are several models which can be used for the determination of Kp, and they are usually based on wind speed, relative humidity and fetch length conditions. Many authors have used these models to investigate the behavior of ET0 in deferent climates [2,[4][5][6]. In addition, some authors have used various models to define new models for Kp.…”

Section: Introductionmentioning

confidence: 99%

Uporedna Analiza Metoda Za Proračun Pan Koeficijenta

Milanovic¹,

Trajković²,

Gocić³

2017

Zbornik GFS

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“…One method to determine the reference evapotranspiration (ET 0 [mm]) is the use of a class-A pan. Due to differences in albedo between water and grass and island effects, among other factors, these measured data have to be corrected by a so-called pan coefficient (Irmark et al, 2002;Gundekar et al, 2008), which is location dependent (Howell et al, 1983). Actual evapotranspiration is even more difficult to measure under field conditions.…”

Section: Introductionmentioning

confidence: 99%

Separating precipitation and evapotranspiration from noise – a new filter routine for high-resolution lysimeter data

Peters

Nehls

Schonsky

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. Weighing lysimeters yield the most precise and realistic measures for evapotranspiration (ET) and precipitation (P ), which are of great importance for many questions regarding soil and atmospheric sciences. An increase or a decrease of the system mass (lysimeter plus seepage) indicates P or ET. These real mass changes of the lysimeter system have to be separated from measurement noise (e.g

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Evaluation of Class A Pan Coefficients for Estimating Reference Evapotranspiration in Humid Location

Cited by 87 publications

References 6 publications

Application Of A Remote Sensing Technique In Estimating Evapotranspiration For Nyazvidzi Sub- Catchment., Zimbabwe

Application Of A Remote Sensing Technique In Estimating Evapotranspiration For Nyazvidzi Sub- Catchment., Zimbabwe

Uporedna Analiza Metoda Za Proračun Pan Koeficijenta

Separating precipitation and evapotranspiration from noise – a new filter routine for high-resolution lysimeter data

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