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97453

MAPPING AND EVALUATION OF REFERENCE EVAPOTRANSPIRATION METHODS UNDER ARID CONDITIONS

Article

Last updated: 26 Dec 2024

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Subjects

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Tags

Agricultural Irrigation and Drainage Engineering

Abstract

Reference evapotranspiration (ETo) is a vital factor in water resources managing and planning. Various estimation methods have been developed for different climatic regions and according to the available data. Therefore, the reliability of such methods depends upon climatic conditions. The present investigation evaluates four temperature based methods: FAO Blaney-Criddle (BC), Turc, Jensen-Haise (JH) and Hargreaves (HG), and two radiation based methods: FAO-radiation (FAO-rad) and Priestley-Taylor (PT) in comparison with the FAO-PM method under arid conditions of Libya. In order to select the best ETo method, the percentage error of estimate (PE), the root mean square error (RMSE), and mean bias error (MBE) were calculated. The obtained ETo values (FAO-PM and the average of best-estimated monthly ETo) were utilized to generate spatial distribution maps of ETo with the aid of Kriging technique. Statistical analysis of the obtained results revealed that, Turc equation fitted well for the northern part of the study area. Which include Nalut, Zuara, Mosrata, Sirt, Shahat, Derna, Tubruk, Hon, Galo and Gagbub. While for southern zone, HG equation performed better for Opari and Tazirbu, BC equation for Kufra and Ghadames, FAO-Rad equation for Sebha; and JH equation for Ghat.

DOI

10.21608/mjae.2017.97453

Keywords

reference evapotranspiration, FAO-PM, Arid conditions, Kriging

Authors

First Name

Mahmoud M.

Last Name

Ali

MiddleName

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Affiliation

Agricultural Engineering Department, Faculty of Agriculture, Fayoum University, Egypt.

Email

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City

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Orcid

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First Name

Ali G.

Last Name

Mahmoud

MiddleName

-

Affiliation

Soil and Water Department, Faculty of Agriculture, Fayoum University, Egypt.

Email

-

City

-

Orcid

-

Volume

34

Article Issue

3

Related Issue

14723

Issue Date

2017-07-01

Receive Date

2020-06-21

Publish Date

2017-07-01

Page Start

1,221

Page End

1,232

Print ISSN

1687-384X

Online ISSN

2636-3062

Article File

MJAE_Volume 34_Issue 3_Pages 1221-1232.pdf

PDF . 936.6kB

Link

https://mjae.journals.ekb.eg/article_97453.html

Detail API

https://mjae.journals.ekb.eg/service?article_code=97453

Order

6

Type

Original Article

Type Code

1,326

Publication Type

Journal

Publication Title

Misr Journal of Agricultural Engineering

Publication Link

https://mjae.journals.ekb.eg/

MainTitle

MAPPING AND EVALUATION OF REFERENCE EVAPOTRANSPIRATION METHODS UNDER ARID CONDITIONS

Details

Type

Article

Created At

23 Jan 2023