Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia

Nigusie Abebe; Mohammed Temam

doi:doi:10.11648/j.ajere.20220703.12

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Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia

Nigusie Abebe, Mohammed Temam

Published in American Journal of Environmental and Resource Economics (Volume 7, Issue 3)

Received: 30 June 2022 Accepted: 3 August 2022 Published: 9 August 2022

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Abstract

Reference Evapotranspiration (ETo), is an important agro-meteorological parameter due to its critical role in determining the crop water requirement in irrigated agriculture. In this study, point ETo value was determined by using FAO Cropwat software. Spatial interpolation was done by using Inverse distance weighted (IDW) method and their distributions were mapped across the West Shewa Zone of Ethiopia. The results showed that both the mean daily and mean annual ETo values was varied between 3.54-3.92mm and 107.65-119.14mm, respectively. The mapped both mean daily and annual ETo distributions over west shewa zone follow similar trends, ETo values were relatively lower in eastern and southern highland of the zone, ETo is intermediate in the central, north, north east of the zone and ETo is higher in the west part of the zone. The relationship between the interpolated ETo distributions based on the IDW method with the help of the GIS tools and that on direct, calculated by using Cropwat, based on penman Monteith procedure using climatic data recorded from meteorological observation was compared. Linear regression analysis showed good fit with the value of R² is 0.84 indicating that, the interpolation by using GIS model has a very high potential of estimating the spatial distribution of ETo with high level of accuracy. The maps produced are useful for irrigation planning, crop water management, basin water balance, climatic characterization and climate change studies in the West Shewa.

Published in	American Journal of Environmental and Resource Economics (Volume 7, Issue 3)
DOI	10.11648/j.ajere.20220703.12
Page(s)	72-76
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2022. Published by Science Publishing Group

Keywords

Evapotranspiration, IDW, West Shewa

References

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[8]	Liu, W., Yang, L., Zhu, M., Adamowski, J. F., Barzegar, R., Wen, X. and Yin, Z., 2021. Effect of elevation on variation in reference evapotranspiration under climate change in northwest china. Sustainability, 13 (18), p. 10151.
[9]	Liu, X. and Zhang, D., 2013. Trend analysis of reference evapotranspiration in Northwest China: The roles of changing wind speed and surface air temperature. Hydrological Processes, 27 (26), pp. 3941-3948.
[10]	Panhalkar, S. S. and Jarag, A. P., 2015. Assessment of spatial interpolation techniques for river bathymetry generation of Panchganga River basin using geoinformatic techniques. Asian J Geoinformatics, 15 (3).
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[12]	Prasad, S. and Kumar, V., 2013. Evaluation of FAO-56 Penman–Monteith and alternative methods for estimating reference evapotranspiration using limited climatic data at Pusa. Journal of Agrometeorology, 15 (1), pp. 22-29.
[13]	Tong, L., Kang, S. and Zhang, L., 2007. Temporal and spatial variations of evapotranspiration for spring wheat in the Shiyang river basin in northwest China. Agricultural water management, 87 (3), pp. 241-250.
[14]	Wang, W., Shao, Q., Peng, S., Xing, W., Yang, T., Luo, Y., Yong, B. and Xu, J., 2012. Reference evapotranspiration change and the causes across the Yellow River Basin during 1957–2008 and their spatial and seasonal differences. Water Resources Research, 48 (5).
[15]	Xihua Yang, Xiaojin Xie, De Li Liu, Fei Ji, Lin Wang, "Spatial Interpolation of Daily Rainfall Data for Local Climate Impact Assessment over Greater Sydney Region", Advances in Meteorology, vol. 2015, Article ID 563629, 12 pages, 2015. https://doi.org/10.1155/2015/563629

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Nigusie Abebe, Mohammed Temam. (2022). Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia. American Journal of Environmental and Resource Economics, 7(3), 72-76. https://doi.org/10.11648/j.ajere.20220703.12

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Nigusie Abebe; Mohammed Temam. Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia. Am. J. Environ. Resour. Econ. 2022, 7(3), 72-76. doi: 10.11648/j.ajere.20220703.12

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AMA Style

Nigusie Abebe, Mohammed Temam. Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia. Am J Environ Resour Econ. 2022;7(3):72-76. doi: 10.11648/j.ajere.20220703.12

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@article{10.11648/j.ajere.20220703.12,
  author = {Nigusie Abebe and Mohammed Temam},
  title = {Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia},
  journal = {American Journal of Environmental and Resource Economics},
  volume = {7},
  number = {3},
  pages = {72-76},
  doi = {10.11648/j.ajere.20220703.12},
  url = {https://doi.org/10.11648/j.ajere.20220703.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajere.20220703.12},
  abstract = {Reference Evapotranspiration (ETo), is an important agro-meteorological parameter due to its critical role in determining the crop water requirement in irrigated agriculture. In this study, point ETo value was determined by using FAO Cropwat software. Spatial interpolation was done by using Inverse distance weighted (IDW) method and their distributions were mapped across the West Shewa Zone of Ethiopia. The results showed that both the mean daily and mean annual ETo values was varied between 3.54-3.92mm and 107.65-119.14mm, respectively. The mapped both mean daily and annual ETo distributions over west shewa zone follow similar trends, ETo values were relatively lower in eastern and southern highland of the zone, ETo is intermediate in the central, north, north east of the zone and ETo is higher in the west part of the zone. The relationship between the interpolated ETo distributions based on the IDW method with the help of the GIS tools and that on direct, calculated by using Cropwat, based on penman Monteith procedure using climatic data recorded from meteorological observation was compared. Linear regression analysis showed good fit with the value of R2 is 0.84 indicating that, the interpolation by using GIS model has a very high potential of estimating the spatial distribution of ETo with high level of accuracy. The maps produced are useful for irrigation planning, crop water management, basin water balance, climatic characterization and climate change studies in the West Shewa.},
 year = {2022}
}

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TY  - JOUR
T1  - Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia
AU  - Nigusie Abebe
AU  - Mohammed Temam
Y1  - 2022/08/09
PY  - 2022
N1  - https://doi.org/10.11648/j.ajere.20220703.12
DO  - 10.11648/j.ajere.20220703.12
T2  - American Journal of Environmental and Resource Economics
JF  - American Journal of Environmental and Resource Economics
JO  - American Journal of Environmental and Resource Economics
SP  - 72
EP  - 76
PB  - Science Publishing Group
SN  - 2578-787X
UR  - https://doi.org/10.11648/j.ajere.20220703.12
AB  - Reference Evapotranspiration (ETo), is an important agro-meteorological parameter due to its critical role in determining the crop water requirement in irrigated agriculture. In this study, point ETo value was determined by using FAO Cropwat software. Spatial interpolation was done by using Inverse distance weighted (IDW) method and their distributions were mapped across the West Shewa Zone of Ethiopia. The results showed that both the mean daily and mean annual ETo values was varied between 3.54-3.92mm and 107.65-119.14mm, respectively. The mapped both mean daily and annual ETo distributions over west shewa zone follow similar trends, ETo values were relatively lower in eastern and southern highland of the zone, ETo is intermediate in the central, north, north east of the zone and ETo is higher in the west part of the zone. The relationship between the interpolated ETo distributions based on the IDW method with the help of the GIS tools and that on direct, calculated by using Cropwat, based on penman Monteith procedure using climatic data recorded from meteorological observation was compared. Linear regression analysis showed good fit with the value of R2 is 0.84 indicating that, the interpolation by using GIS model has a very high potential of estimating the spatial distribution of ETo with high level of accuracy. The maps produced are useful for irrigation planning, crop water management, basin water balance, climatic characterization and climate change studies in the West Shewa.
VL  - 7
IS  - 3
ER  -

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Author Information

Nigusie Abebe

Ethiopian Institute of Agricultural Research, Holleta Agricultural Research Center, Holleta, Ethiopia
Mohammed Temam

Ethiopian Institute of Agricultural Research, Holleta Agricultural Research Center, Holleta, Ethiopia

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APA Style

Nigusie Abebe, Mohammed Temam. (2022). Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia. American Journal of Environmental and Resource Economics, 7(3), 72-76. https://doi.org/10.11648/j.ajere.20220703.12

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ACS Style

Nigusie Abebe; Mohammed Temam. Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia. Am. J. Environ. Resour. Econ. 2022, 7(3), 72-76. doi: 10.11648/j.ajere.20220703.12

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AMA Style

Nigusie Abebe, Mohammed Temam. Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia. Am J Environ Resour Econ. 2022;7(3):72-76. doi: 10.11648/j.ajere.20220703.12

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@article{10.11648/j.ajere.20220703.12,
  author = {Nigusie Abebe and Mohammed Temam},
  title = {Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia},
  journal = {American Journal of Environmental and Resource Economics},
  volume = {7},
  number = {3},
  pages = {72-76},
  doi = {10.11648/j.ajere.20220703.12},
  url = {https://doi.org/10.11648/j.ajere.20220703.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajere.20220703.12},
  abstract = {Reference Evapotranspiration (ETo), is an important agro-meteorological parameter due to its critical role in determining the crop water requirement in irrigated agriculture. In this study, point ETo value was determined by using FAO Cropwat software. Spatial interpolation was done by using Inverse distance weighted (IDW) method and their distributions were mapped across the West Shewa Zone of Ethiopia. The results showed that both the mean daily and mean annual ETo values was varied between 3.54-3.92mm and 107.65-119.14mm, respectively. The mapped both mean daily and annual ETo distributions over west shewa zone follow similar trends, ETo values were relatively lower in eastern and southern highland of the zone, ETo is intermediate in the central, north, north east of the zone and ETo is higher in the west part of the zone. The relationship between the interpolated ETo distributions based on the IDW method with the help of the GIS tools and that on direct, calculated by using Cropwat, based on penman Monteith procedure using climatic data recorded from meteorological observation was compared. Linear regression analysis showed good fit with the value of R2 is 0.84 indicating that, the interpolation by using GIS model has a very high potential of estimating the spatial distribution of ETo with high level of accuracy. The maps produced are useful for irrigation planning, crop water management, basin water balance, climatic characterization and climate change studies in the West Shewa.},
 year = {2022}
}

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TY  - JOUR
T1  - Estimation and Mapping of Spatial Distribution of Reference Evapotranspiration over West Shewa Zone, Ethiopia
AU  - Nigusie Abebe
AU  - Mohammed Temam
Y1  - 2022/08/09
PY  - 2022
N1  - https://doi.org/10.11648/j.ajere.20220703.12
DO  - 10.11648/j.ajere.20220703.12
T2  - American Journal of Environmental and Resource Economics
JF  - American Journal of Environmental and Resource Economics
JO  - American Journal of Environmental and Resource Economics
SP  - 72
EP  - 76
PB  - Science Publishing Group
SN  - 2578-787X
UR  - https://doi.org/10.11648/j.ajere.20220703.12
AB  - Reference Evapotranspiration (ETo), is an important agro-meteorological parameter due to its critical role in determining the crop water requirement in irrigated agriculture. In this study, point ETo value was determined by using FAO Cropwat software. Spatial interpolation was done by using Inverse distance weighted (IDW) method and their distributions were mapped across the West Shewa Zone of Ethiopia. The results showed that both the mean daily and mean annual ETo values was varied between 3.54-3.92mm and 107.65-119.14mm, respectively. The mapped both mean daily and annual ETo distributions over west shewa zone follow similar trends, ETo values were relatively lower in eastern and southern highland of the zone, ETo is intermediate in the central, north, north east of the zone and ETo is higher in the west part of the zone. The relationship between the interpolated ETo distributions based on the IDW method with the help of the GIS tools and that on direct, calculated by using Cropwat, based on penman Monteith procedure using climatic data recorded from meteorological observation was compared. Linear regression analysis showed good fit with the value of R2 is 0.84 indicating that, the interpolation by using GIS model has a very high potential of estimating the spatial distribution of ETo with high level of accuracy. The maps produced are useful for irrigation planning, crop water management, basin water balance, climatic characterization and climate change studies in the West Shewa.
VL  - 7
IS  - 3
ER  -

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