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Soil salinization and critical shallow groundwater depth under saline irrigation condition in a Saharan irrigated land

Haj-Amor, Zied; Hashemi, Hossein LU and Bouri, Salem (2017) In Arabian Journal of Geosciences 10(14).
Abstract

In the arid irrigated lands, understanding the impact of shallow groundwater fluctuation on soil salinization has become crucial. Thus, investigation of the possible options for maintaining the groundwater depth for improving land productivity is of great importance. In this study, under saline irrigation condition, the effects of shallow groundwater depth on water and salt dynamics in the root-zone of date palms were analyzed through a particular field and modeling (SWAP) investigation in a Tunisian Saharan oasis (Dergine Oasis). The model was calibrated and validated against the measured soil water content through the date palm root-zone. The good agreement between measured and estimated soil water content demonstrated that the SWAP... (More)

In the arid irrigated lands, understanding the impact of shallow groundwater fluctuation on soil salinization has become crucial. Thus, investigation of the possible options for maintaining the groundwater depth for improving land productivity is of great importance. In this study, under saline irrigation condition, the effects of shallow groundwater depth on water and salt dynamics in the root-zone of date palms were analyzed through a particular field and modeling (SWAP) investigation in a Tunisian Saharan oasis (Dergine Oasis). The model was calibrated and validated against the measured soil water content through the date palm root-zone. The good agreement between measured and estimated soil water content demonstrated that the SWAP model is an effective tool to accurately simulate the water and salt dynamics in the root-zone of date palm. Multiple groundwater depth scenarios were performed, using the calibrated SWAP model, to achieve the optimal groundwater depth. The simulation results revealed that the shallow groundwater with a depth of ~80 cm coupled with frequent irrigation (20 days interval) during the summer season is the best practice to maintain the adequate soil water content (>0.035 (cm3 cm−3) and safe salinity level (<4 dS m−1) in the root-zone layer. The results of field investigation and numerical simulation in the present study can lead to a better management of lands with shallow water table in the Saharan irrigated areas.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Shallow groundwater, Soil salinization, Soil water content, SWAP
in
Arabian Journal of Geosciences
volume
10
issue
14
external identifiers
  • scopus:85023756311
  • wos:000405481100011
ISSN
1866-7511
DOI
10.1007/s12517-017-3093-y
language
English
LU publication?
yes
id
c43eb58e-a85b-412f-a37d-9d92c57446a2
date added to LUP
2017-07-27 13:10:37
date last changed
2017-09-18 11:40:04
@article{c43eb58e-a85b-412f-a37d-9d92c57446a2,
  abstract     = {<p>In the arid irrigated lands, understanding the impact of shallow groundwater fluctuation on soil salinization has become crucial. Thus, investigation of the possible options for maintaining the groundwater depth for improving land productivity is of great importance. In this study, under saline irrigation condition, the effects of shallow groundwater depth on water and salt dynamics in the root-zone of date palms were analyzed through a particular field and modeling (SWAP) investigation in a Tunisian Saharan oasis (Dergine Oasis). The model was calibrated and validated against the measured soil water content through the date palm root-zone. The good agreement between measured and estimated soil water content demonstrated that the SWAP model is an effective tool to accurately simulate the water and salt dynamics in the root-zone of date palm. Multiple groundwater depth scenarios were performed, using the calibrated SWAP model, to achieve the optimal groundwater depth. The simulation results revealed that the shallow groundwater with a depth of ~80 cm coupled with frequent irrigation (20 days interval) during the summer season is the best practice to maintain the adequate soil water content (&gt;0.035 (cm<sup>3</sup> cm<sup>−3</sup>) and safe salinity level (&lt;4 dS m<sup>−1</sup>) in the root-zone layer. The results of field investigation and numerical simulation in the present study can lead to a better management of lands with shallow water table in the Saharan irrigated areas.</p>},
  articleno    = {301},
  author       = {Haj-Amor, Zied and Hashemi, Hossein and Bouri, Salem},
  issn         = {1866-7511},
  keyword      = {Shallow groundwater,Soil salinization,Soil water content,SWAP},
  language     = {eng},
  month        = {07},
  number       = {14},
  series       = {Arabian Journal of Geosciences},
  title        = {Soil salinization and critical shallow groundwater depth under saline irrigation condition in a Saharan irrigated land},
  url          = {http://dx.doi.org/10.1007/s12517-017-3093-y},
  volume       = {10},
  year         = {2017},
}