Cover Image

Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement

Reference crop evapotranspiration (ET o), used to determine actual crop evapotranspiration, is often estimated from pan evaporation (EP) data. However, uncertainties in the relationship between ET o and EP often result in unreliable estimate of crop evapotranspiration. This study investigated the re...

Full description

Saved in:
Bibliographic Details
Main Authors: Kamal, Md. Rowshon, Mohd Soom, Mohd Amin, Mojid, Mohammad Abdul, Yaji, M.
Format: Article
Language:English
Published: Springer 2014
Online Access:http://psasir.upm.edu.my/id/eprint/37492/1/Estimated%20evapotranspiration%20of%20rice%20based%20on%20pan%20evaporation%20as%20a%20surrogate%20to%20lysimeter%20measurement.pdf
http://psasir.upm.edu.my/id/eprint/37492/
http://link.springer.com/article/10.1007%2Fs10333-013-0356-4
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.37492
record_format eprints
spelling my.upm.eprints.374922015-12-16T08:35:54Z http://psasir.upm.edu.my/id/eprint/37492/ Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement Kamal, Md. Rowshon Mohd Soom, Mohd Amin Mojid, Mohammad Abdul Yaji, M. Reference crop evapotranspiration (ET o), used to determine actual crop evapotranspiration, is often estimated from pan evaporation (EP) data. However, uncertainties in the relationship between ET o and EP often result in unreliable estimate of crop evapotranspiration. This study investigated the relationship between measured and estimated crop evapotranspirations, ET m and ET e, respectively, at tillering (9–30 days after transplanting, DAT) and mid-growth (51–72 DAT) stages of a rice variety. ET m was measured with a Marriott Tube-type Micro-lysimeter (hereafter referred to Micro-lysimeter) in a ponded rice field and ET e was estimated from EP, which was measured by employing the US Weather Bureau Class ‘A’ Evaporation Pan (hereafter referred to Class A Evaporation Pan). A strong linear relation (r 2 = 0.89) at the tillering stage and a weak relation (r 2 = 0.48) at the mid-growth stage were obtained between ET m and EP. The slope of this plot provided a pan-crop factor (K p K c), which was 0.81 at the tillering stage and 0.79 at the mid-growth stage. The ET e versus ET m relationship was also strongly linear (r 2 = 0.90) at the tillering stage but weakly linear (r 2 = 0.50) at the mid-growth stage. The pan-based method thus provided reliable estimates of evapotranspiration during the tillering stage of rice. Springer 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/37492/1/Estimated%20evapotranspiration%20of%20rice%20based%20on%20pan%20evaporation%20as%20a%20surrogate%20to%20lysimeter%20measurement.pdf Kamal, Md. Rowshon and Mohd Soom, Mohd Amin and Mojid, Mohammad Abdul and Yaji, M. (2014) Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement. Paddy and Water Environment, 12 (1). pp. 35-41. ISSN 1611-2490; ESSN: 1611-2504 http://link.springer.com/article/10.1007%2Fs10333-013-0356-4 10.1007/s10333-013-0356-4
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Reference crop evapotranspiration (ET o), used to determine actual crop evapotranspiration, is often estimated from pan evaporation (EP) data. However, uncertainties in the relationship between ET o and EP often result in unreliable estimate of crop evapotranspiration. This study investigated the relationship between measured and estimated crop evapotranspirations, ET m and ET e, respectively, at tillering (9–30 days after transplanting, DAT) and mid-growth (51–72 DAT) stages of a rice variety. ET m was measured with a Marriott Tube-type Micro-lysimeter (hereafter referred to Micro-lysimeter) in a ponded rice field and ET e was estimated from EP, which was measured by employing the US Weather Bureau Class ‘A’ Evaporation Pan (hereafter referred to Class A Evaporation Pan). A strong linear relation (r 2 = 0.89) at the tillering stage and a weak relation (r 2 = 0.48) at the mid-growth stage were obtained between ET m and EP. The slope of this plot provided a pan-crop factor (K p K c), which was 0.81 at the tillering stage and 0.79 at the mid-growth stage. The ET e versus ET m relationship was also strongly linear (r 2 = 0.90) at the tillering stage but weakly linear (r 2 = 0.50) at the mid-growth stage. The pan-based method thus provided reliable estimates of evapotranspiration during the tillering stage of rice.
format Article
author Kamal, Md. Rowshon
Mohd Soom, Mohd Amin
Mojid, Mohammad Abdul
Yaji, M.
spellingShingle Kamal, Md. Rowshon
Mohd Soom, Mohd Amin
Mojid, Mohammad Abdul
Yaji, M.
Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
author_facet Kamal, Md. Rowshon
Mohd Soom, Mohd Amin
Mojid, Mohammad Abdul
Yaji, M.
author_sort Kamal, Md. Rowshon
title Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
title_short Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
title_full Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
title_fullStr Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
title_full_unstemmed Estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
title_sort estimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
publisher Springer
publishDate 2014
url http://psasir.upm.edu.my/id/eprint/37492/1/Estimated%20evapotranspiration%20of%20rice%20based%20on%20pan%20evaporation%20as%20a%20surrogate%20to%20lysimeter%20measurement.pdf
http://psasir.upm.edu.my/id/eprint/37492/
http://link.springer.com/article/10.1007%2Fs10333-013-0356-4
_version_ 1643831997699719168
score 13.211869

Similar Items