Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems

Hammami Moncef; Zayani Khemaies

doi:doi:10.11648/j.ajwse.20190501.13

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Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems

Hammami Moncef, Zayani Khemaies

Published in American Journal of Water Science and Engineering (Volume 5, Issue 1)

Received: 9 December 2018 Accepted: 30 January 2019 Published: 28 February 2019

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Abstract

The usual approaches for designing trickle irrigation systems are based upon empirical estimation of the emitters’ density and the moistened soil volume. The objective of this paper is to implement a quasi-analytical approach that allows the inference of these two parameters. The emitters’ density is determined so that the rooted soil volume would be moistened even at the peak period. The proposed approach enables to adjust the irrigation time in order to replenish the rooted soil volume up to a threshold for an optimal plant growth. The required inputs are: the water retention curve, the hydraulic conductivity at the wetting front, the radius of the moistened spot at the soil surface, and the rooted soil depth. The method is assessed with respect to study cases for sandy and silty soils. The used emitters’ discharge were 2 l/h and 4 l/h. The present approach has the advantage of preserving the mass conservation as well as the dynamic aspect of irrigation management. For design purpose, the irrigation time is set equal to the time required to attain a quasi-state flow conditions within the rooted zone. Nevertheless, irrigation time should vary so that design errors are adjusted for irrigation scheduling needs.

Published in	American Journal of Water Science and Engineering (Volume 5, Issue 1)
DOI	10.11648/j.ajwse.20190501.13
Page(s)	16-21
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), 2019. Published by Science Publishing Group

Keywords

Trickle Irrigation, Wetted Soil Volume, Emitters’ Density, Irrigation Management

References

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Hammami Moncef, Zayani Khemaies. (2019). Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems. American Journal of Water Science and Engineering, 5(1), 16-21. https://doi.org/10.11648/j.ajwse.20190501.13

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ACS Style

Hammami Moncef; Zayani Khemaies. Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems. Am. J. Water Sci. Eng. 2019, 5(1), 16-21. doi: 10.11648/j.ajwse.20190501.13

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AMA Style

Hammami Moncef, Zayani Khemaies. Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems. Am J Water Sci Eng. 2019;5(1):16-21. doi: 10.11648/j.ajwse.20190501.13

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@article{10.11648/j.ajwse.20190501.13,
  author = {Hammami Moncef and Zayani Khemaies},
  title = {Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems},
  journal = {American Journal of Water Science and Engineering},
  volume = {5},
  number = {1},
  pages = {16-21},
  doi = {10.11648/j.ajwse.20190501.13},
  url = {https://doi.org/10.11648/j.ajwse.20190501.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajwse.20190501.13},
  abstract = {The usual approaches for designing trickle irrigation systems are based upon empirical estimation of the emitters’ density and the moistened soil volume. The objective of this paper is to implement a quasi-analytical approach that allows the inference of these two parameters. The emitters’ density is determined so that the rooted soil volume would be moistened even at the peak period. The proposed approach enables to adjust the irrigation time in order to replenish the rooted soil volume up to a threshold for an optimal plant growth. The required inputs are: the water retention curve, the hydraulic conductivity at the wetting front, the radius of the moistened spot at the soil surface, and the rooted soil depth. The method is assessed with respect to study cases for sandy and silty soils. The used emitters’ discharge were 2 l/h and 4 l/h. The present approach has the advantage of preserving the mass conservation as well as the dynamic aspect of irrigation management. For design purpose, the irrigation time is set equal to the time required to attain a quasi-state flow conditions within the rooted zone. Nevertheless, irrigation time should vary so that design errors are adjusted for irrigation scheduling needs.},
 year = {2019}
}

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TY - JOUR
T1 - Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems
AU - Hammami Moncef
AU - Zayani Khemaies
Y1 - 2019/02/28
PY - 2019
N1 - https://doi.org/10.11648/j.ajwse.20190501.13
DO - 10.11648/j.ajwse.20190501.13
T2 - American Journal of Water Science and Engineering
JF - American Journal of Water Science and Engineering
JO - American Journal of Water Science and Engineering
SP - 16
EP - 21
PB - Science Publishing Group
SN - 2575-1875
UR - https://doi.org/10.11648/j.ajwse.20190501.13
AB - The usual approaches for designing trickle irrigation systems are based upon empirical estimation of the emitters’ density and the moistened soil volume. The objective of this paper is to implement a quasi-analytical approach that allows the inference of these two parameters. The emitters’ density is determined so that the rooted soil volume would be moistened even at the peak period. The proposed approach enables to adjust the irrigation time in order to replenish the rooted soil volume up to a threshold for an optimal plant growth. The required inputs are: the water retention curve, the hydraulic conductivity at the wetting front, the radius of the moistened spot at the soil surface, and the rooted soil depth. The method is assessed with respect to study cases for sandy and silty soils. The used emitters’ discharge were 2 l/h and 4 l/h. The present approach has the advantage of preserving the mass conservation as well as the dynamic aspect of irrigation management. For design purpose, the irrigation time is set equal to the time required to attain a quasi-state flow conditions within the rooted zone. Nevertheless, irrigation time should vary so that design errors are adjusted for irrigation scheduling needs.
VL - 5
IS - 1
ER -

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Author Information

Hammami Moncef

Hydraulic Department, Higher School of Engineers Medjez El Bab, University of Jendouba, Jendouba, Tunisia
Zayani Khemaies

Department of Rural Engineering, National Agronomic Institute of Tunis, University of Carthage, Tunis, Tunisia

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APA Style

Hammami Moncef, Zayani Khemaies. (2019). Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems. American Journal of Water Science and Engineering, 5(1), 16-21. https://doi.org/10.11648/j.ajwse.20190501.13

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ACS Style

Hammami Moncef; Zayani Khemaies. Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems. Am. J. Water Sci. Eng. 2019, 5(1), 16-21. doi: 10.11648/j.ajwse.20190501.13

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AMA Style

Hammami Moncef, Zayani Khemaies. Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems. Am J Water Sci Eng. 2019;5(1):16-21. doi: 10.11648/j.ajwse.20190501.13

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@article{10.11648/j.ajwse.20190501.13,
  author = {Hammami Moncef and Zayani Khemaies},
  title = {Optimizing Emitters’ Density and Water Supplies in Trickle Irrigation Systems},
  journal = {American Journal of Water Science and Engineering},
  volume = {5},
  number = {1},
  pages = {16-21},
  doi = {10.11648/j.ajwse.20190501.13},
  url = {https://doi.org/10.11648/j.ajwse.20190501.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajwse.20190501.13},
  abstract = {The usual approaches for designing trickle irrigation systems are based upon empirical estimation of the emitters’ density and the moistened soil volume. The objective of this paper is to implement a quasi-analytical approach that allows the inference of these two parameters. The emitters’ density is determined so that the rooted soil volume would be moistened even at the peak period. The proposed approach enables to adjust the irrigation time in order to replenish the rooted soil volume up to a threshold for an optimal plant growth. The required inputs are: the water retention curve, the hydraulic conductivity at the wetting front, the radius of the moistened spot at the soil surface, and the rooted soil depth. The method is assessed with respect to study cases for sandy and silty soils. The used emitters’ discharge were 2 l/h and 4 l/h. The present approach has the advantage of preserving the mass conservation as well as the dynamic aspect of irrigation management. For design purpose, the irrigation time is set equal to the time required to attain a quasi-state flow conditions within the rooted zone. Nevertheless, irrigation time should vary so that design errors are adjusted for irrigation scheduling needs.},
 year = {2019}
}

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