Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia

Minda Tadesse

doi:doi:10.11648/j.ijnrem.20210603.12

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Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia

Minda Tadesse

Published in International Journal of Natural Resource Ecology and Management (Volume 6, Issue 3)

Received: 15 May 2021 Accepted: 13 July 2021 Published: 22 July 2021

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Abstract

ETo is important parameter in determination of crop water requirement and in irrigation scheduling. The absence of rainfall during four to six months of the year affects crop production. Study was undertaken in Jimma zone, Southwestern Ethiopia, with the objective of evaluating and characterizing the reference evapotranspiration and mapping for planning and management options for Jimma Zone. The study was undertaken at 22 sites of which 14 being from Jimma zone and the remaining eight sites were from around the vicinity of study area. The ETo was estimated using Penman–Monteith method in CROPWAT 8.0 software with monthly datasets of 22 stations for the period of 31 years. The results of ETo were further analyzed by means of geo-statistical tools in R software using gstat package. Maps were created using ordinary kriging combined with regression method. The results have shown that the ETo, have shown moderate to greater variability. The high annual and monthly ETo values were observed around the extreme eastern tip, extreme southern tip and north western tip. In contrary low ETo values were observed in southeastern and western regions. March (4.61 mm/day) and July (2.97mm/day), respectively, presented the highest and the smallest ETo. The ETo for Jimma zone is a good indicator and benefits to farmers to help in planning the water resources of the area for best irrigation water management practices.

Published in	International Journal of Natural Resource Ecology and Management (Volume 6, Issue 3)
DOI	10.11648/j.ijnrem.20210603.12
Page(s)	108-115
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), 2021. Published by Science Publishing Group

Keywords

Reference Evapotranspiration, Spatial and Temporal Variability, Mapping of ETo, Spatial Distribution

References

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APA Style

Minda Tadesse. (2021). Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia. International Journal of Natural Resource Ecology and Management, 6(3), 108-115. https://doi.org/10.11648/j.ijnrem.20210603.12

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ACS Style

Minda Tadesse. Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia. Int. J. Nat. Resour. Ecol. Manag. 2021, 6(3), 108-115. doi: 10.11648/j.ijnrem.20210603.12

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AMA Style

Minda Tadesse. Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia. Int J Nat Resour Ecol Manag. 2021;6(3):108-115. doi: 10.11648/j.ijnrem.20210603.12

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@article{10.11648/j.ijnrem.20210603.12,
  author = {Minda Tadesse},
  title = {Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia},
  journal = {International Journal of Natural Resource Ecology and Management},
  volume = {6},
  number = {3},
  pages = {108-115},
  doi = {10.11648/j.ijnrem.20210603.12},
  url = {https://doi.org/10.11648/j.ijnrem.20210603.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijnrem.20210603.12},
  abstract = {ETo is important parameter in determination of crop water requirement and in irrigation scheduling. The absence of rainfall during four to six months of the year affects crop production. Study was undertaken in Jimma zone, Southwestern Ethiopia, with the objective of evaluating and characterizing the reference evapotranspiration and mapping for planning and management options for Jimma Zone. The study was undertaken at 22 sites of which 14 being from Jimma zone and the remaining eight sites were from around the vicinity of study area. The ETo was estimated using Penman–Monteith method in CROPWAT 8.0 software with monthly datasets of 22 stations for the period of 31 years. The results of ETo were further analyzed by means of geo-statistical tools in R software using gstat package. Maps were created using ordinary kriging combined with regression method. The results have shown that the ETo, have shown moderate to greater variability. The high annual and monthly ETo values were observed around the extreme eastern tip, extreme southern tip and north western tip. In contrary low ETo values were observed in southeastern and western regions. March (4.61 mm/day) and July (2.97mm/day), respectively, presented the highest and the smallest ETo. The ETo for Jimma zone is a good indicator and benefits to farmers to help in planning the water resources of the area for best irrigation water management practices.},
 year = {2021}
}

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TY - JOUR
T1 - Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia
AU - Minda Tadesse
Y1 - 2021/07/22
PY - 2021
N1 - https://doi.org/10.11648/j.ijnrem.20210603.12
DO - 10.11648/j.ijnrem.20210603.12
T2 - International Journal of Natural Resource Ecology and Management
JF - International Journal of Natural Resource Ecology and Management
JO - International Journal of Natural Resource Ecology and Management
SP - 108
EP - 115
PB - Science Publishing Group
SN - 2575-3061
UR - https://doi.org/10.11648/j.ijnrem.20210603.12
AB - ETo is important parameter in determination of crop water requirement and in irrigation scheduling. The absence of rainfall during four to six months of the year affects crop production. Study was undertaken in Jimma zone, Southwestern Ethiopia, with the objective of evaluating and characterizing the reference evapotranspiration and mapping for planning and management options for Jimma Zone. The study was undertaken at 22 sites of which 14 being from Jimma zone and the remaining eight sites were from around the vicinity of study area. The ETo was estimated using Penman–Monteith method in CROPWAT 8.0 software with monthly datasets of 22 stations for the period of 31 years. The results of ETo were further analyzed by means of geo-statistical tools in R software using gstat package. Maps were created using ordinary kriging combined with regression method. The results have shown that the ETo, have shown moderate to greater variability. The high annual and monthly ETo values were observed around the extreme eastern tip, extreme southern tip and north western tip. In contrary low ETo values were observed in southeastern and western regions. March (4.61 mm/day) and July (2.97mm/day), respectively, presented the highest and the smallest ETo. The ETo for Jimma zone is a good indicator and benefits to farmers to help in planning the water resources of the area for best irrigation water management practices.
VL - 6
IS - 3
ER -

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Author Information

Minda Tadesse

Jimma Agricultural Research Centre, Ethiopian Institute of Agricultural Research, Jimma, Ethiopia

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Plain Text BibTeX RIS

APA Style

Minda Tadesse. (2021). Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia. International Journal of Natural Resource Ecology and Management, 6(3), 108-115. https://doi.org/10.11648/j.ijnrem.20210603.12

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ACS Style

Minda Tadesse. Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia. Int. J. Nat. Resour. Ecol. Manag. 2021, 6(3), 108-115. doi: 10.11648/j.ijnrem.20210603.12

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AMA Style

Minda Tadesse. Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia. Int J Nat Resour Ecol Manag. 2021;6(3):108-115. doi: 10.11648/j.ijnrem.20210603.12

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@article{10.11648/j.ijnrem.20210603.12,
  author = {Minda Tadesse},
  title = {Spatial and Temporal Variability Analysis and Mapping of Reference Evapotranspiration for Jimma Zone, Southwestern Ethiopia},
  journal = {International Journal of Natural Resource Ecology and Management},
  volume = {6},
  number = {3},
  pages = {108-115},
  doi = {10.11648/j.ijnrem.20210603.12},
  url = {https://doi.org/10.11648/j.ijnrem.20210603.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijnrem.20210603.12},
  abstract = {ETo is important parameter in determination of crop water requirement and in irrigation scheduling. The absence of rainfall during four to six months of the year affects crop production. Study was undertaken in Jimma zone, Southwestern Ethiopia, with the objective of evaluating and characterizing the reference evapotranspiration and mapping for planning and management options for Jimma Zone. The study was undertaken at 22 sites of which 14 being from Jimma zone and the remaining eight sites were from around the vicinity of study area. The ETo was estimated using Penman–Monteith method in CROPWAT 8.0 software with monthly datasets of 22 stations for the period of 31 years. The results of ETo were further analyzed by means of geo-statistical tools in R software using gstat package. Maps were created using ordinary kriging combined with regression method. The results have shown that the ETo, have shown moderate to greater variability. The high annual and monthly ETo values were observed around the extreme eastern tip, extreme southern tip and north western tip. In contrary low ETo values were observed in southeastern and western regions. March (4.61 mm/day) and July (2.97mm/day), respectively, presented the highest and the smallest ETo. The ETo for Jimma zone is a good indicator and benefits to farmers to help in planning the water resources of the area for best irrigation water management practices.},
 year = {2021}
}

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