Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River

Abdoul Aziz Gning; Alassane Thiam; Raymond Malou; Mapathé Ndiaye

doi:doi:10.11648/j.wros.20200905.13

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Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River

Abdoul Aziz Gning, Alassane Thiam, Raymond Malou, Mapathé Ndiaye

Published in Journal of Water Resources and Ocean Science (Volume 9, Issue 5)

Received: 15 September 2020 Accepted: 5 October 2020 Published: 22 October 2020

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Abstract

Building dams on the Senegal River has facilitated the development of irrigated farming in Delta of Senegal River. However, this practice is threatened by the increasing degradation of soils mainly caused by salinization. The main cause of this problem is the presence of a salty aquifer at a low depth. Nevertheless, the characteristics and functioning of this aquifer are not well known. The main objective of this study, funded by Wallonie-Brussels International, is a contribution to the characterization of the hydrodynamic functioning, the hydro geochemistry of the aquifer and to identify the impact on agricultural waters. A two-step methodology has been developed: Firstly, a regional survey has been performed in the whole delta; secondly an irrigation plot has been monitored to have a detailed description of the groundwater dynamic and of the transport of salt under irrigation. Results of the regional survey show (1) the main factors that explain the fluctuation of the groundwater level are the artificial high water levels in the River, rice growing and to a lesser extent precipitation and (2) the high salt concentration in the upper aquifer. The monitoring of the Ndelle rice growing area (30 km to the North-East of Saint-Louis) has allowed calculating water and salt budgets at the scale of the irrigation plot. The influence of the irrigation on the groundwater levels has also been studied.

Published in	Journal of Water Resources and Ocean Science (Volume 9, Issue 5)
DOI	10.11648/j.wros.20200905.13
Page(s)	107-122
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), 2020. Published by Science Publishing Group

Keywords

Groundwater, Salinization, Irrigation, Delta of Senegal River, Senegal

References

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APA Style

Abdoul Aziz Gning, Alassane Thiam, Raymond Malou, Mapathé Ndiaye. (2020). Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River. Journal of Water Resources and Ocean Science, 9(5), 107-122. https://doi.org/10.11648/j.wros.20200905.13

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ACS Style

Abdoul Aziz Gning; Alassane Thiam; Raymond Malou; Mapathé Ndiaye. Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River. J. Water Resour. Ocean Sci. 2020, 9(5), 107-122. doi: 10.11648/j.wros.20200905.13

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AMA Style

Abdoul Aziz Gning, Alassane Thiam, Raymond Malou, Mapathé Ndiaye. Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River. J Water Resour Ocean Sci. 2020;9(5):107-122. doi: 10.11648/j.wros.20200905.13

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@article{10.11648/j.wros.20200905.13,
  author = {Abdoul Aziz Gning and Alassane Thiam and Raymond Malou and Mapathé Ndiaye},
  title = {Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River},
  journal = {Journal of Water Resources and Ocean Science},
  volume = {9},
  number = {5},
  pages = {107-122},
  doi = {10.11648/j.wros.20200905.13},
  url = {https://doi.org/10.11648/j.wros.20200905.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wros.20200905.13},
  abstract = {Building dams on the Senegal River has facilitated the development of irrigated farming in Delta of Senegal River. However, this practice is threatened by the increasing degradation of soils mainly caused by salinization. The main cause of this problem is the presence of a salty aquifer at a low depth. Nevertheless, the characteristics and functioning of this aquifer are not well known. The main objective of this study, funded by Wallonie-Brussels International, is a contribution to the characterization of the hydrodynamic functioning, the hydro geochemistry of the aquifer and to identify the impact on agricultural waters. A two-step methodology has been developed: Firstly, a regional survey has been performed in the whole delta; secondly an irrigation plot has been monitored to have a detailed description of the groundwater dynamic and of the transport of salt under irrigation. Results of the regional survey show (1) the main factors that explain the fluctuation of the groundwater level are the artificial high water levels in the River, rice growing and to a lesser extent precipitation and (2) the high salt concentration in the upper aquifer. The monitoring of the Ndelle rice growing area (30 km to the North-East of Saint-Louis) has allowed calculating water and salt budgets at the scale of the irrigation plot. The influence of the irrigation on the groundwater levels has also been studied.},
 year = {2020}
}

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TY  - JOUR
T1  - Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River
AU  - Abdoul Aziz Gning
AU  - Alassane Thiam
AU  - Raymond Malou
AU  - Mapathé Ndiaye
Y1  - 2020/10/22
PY  - 2020
N1  - https://doi.org/10.11648/j.wros.20200905.13
DO  - 10.11648/j.wros.20200905.13
T2  - Journal of Water Resources and Ocean Science
JF  - Journal of Water Resources and Ocean Science
JO  - Journal of Water Resources and Ocean Science
SP  - 107
EP  - 122
PB  - Science Publishing Group
SN  - 2328-7993
UR  - https://doi.org/10.11648/j.wros.20200905.13
AB  - Building dams on the Senegal River has facilitated the development of irrigated farming in Delta of Senegal River. However, this practice is threatened by the increasing degradation of soils mainly caused by salinization. The main cause of this problem is the presence of a salty aquifer at a low depth. Nevertheless, the characteristics and functioning of this aquifer are not well known. The main objective of this study, funded by Wallonie-Brussels International, is a contribution to the characterization of the hydrodynamic functioning, the hydro geochemistry of the aquifer and to identify the impact on agricultural waters. A two-step methodology has been developed: Firstly, a regional survey has been performed in the whole delta; secondly an irrigation plot has been monitored to have a detailed description of the groundwater dynamic and of the transport of salt under irrigation. Results of the regional survey show (1) the main factors that explain the fluctuation of the groundwater level are the artificial high water levels in the River, rice growing and to a lesser extent precipitation and (2) the high salt concentration in the upper aquifer. The monitoring of the Ndelle rice growing area (30 km to the North-East of Saint-Louis) has allowed calculating water and salt budgets at the scale of the irrigation plot. The influence of the irrigation on the groundwater levels has also been studied.
VL  - 9
IS  - 5
ER  -

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Author Information

Abdoul Aziz Gning

Faculty of Sciences and Technics, University Cheikh Anta Diop, Dakar, Senegal
Alassane Thiam

Faculty of Training for Engineering, University of Thies, Thies, Senegal
Raymond Malou

Faculty of Sciences and Technics, University Cheikh Anta Diop, Dakar, Senegal
Mapathé Ndiaye

Faculty of Sciences and Technics, University Cheikh Anta Diop, Dakar, Senegal

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APA Style

Abdoul Aziz Gning, Alassane Thiam, Raymond Malou, Mapathé Ndiaye. (2020). Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River. Journal of Water Resources and Ocean Science, 9(5), 107-122. https://doi.org/10.11648/j.wros.20200905.13

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ACS Style

Abdoul Aziz Gning; Alassane Thiam; Raymond Malou; Mapathé Ndiaye. Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River. J. Water Resour. Ocean Sci. 2020, 9(5), 107-122. doi: 10.11648/j.wros.20200905.13

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AMA Style

Abdoul Aziz Gning, Alassane Thiam, Raymond Malou, Mapathé Ndiaye. Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River. J Water Resour Ocean Sci. 2020;9(5):107-122. doi: 10.11648/j.wros.20200905.13

Copy | Download

@article{10.11648/j.wros.20200905.13,
  author = {Abdoul Aziz Gning and Alassane Thiam and Raymond Malou and Mapathé Ndiaye},
  title = {Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River},
  journal = {Journal of Water Resources and Ocean Science},
  volume = {9},
  number = {5},
  pages = {107-122},
  doi = {10.11648/j.wros.20200905.13},
  url = {https://doi.org/10.11648/j.wros.20200905.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wros.20200905.13},
  abstract = {Building dams on the Senegal River has facilitated the development of irrigated farming in Delta of Senegal River. However, this practice is threatened by the increasing degradation of soils mainly caused by salinization. The main cause of this problem is the presence of a salty aquifer at a low depth. Nevertheless, the characteristics and functioning of this aquifer are not well known. The main objective of this study, funded by Wallonie-Brussels International, is a contribution to the characterization of the hydrodynamic functioning, the hydro geochemistry of the aquifer and to identify the impact on agricultural waters. A two-step methodology has been developed: Firstly, a regional survey has been performed in the whole delta; secondly an irrigation plot has been monitored to have a detailed description of the groundwater dynamic and of the transport of salt under irrigation. Results of the regional survey show (1) the main factors that explain the fluctuation of the groundwater level are the artificial high water levels in the River, rice growing and to a lesser extent precipitation and (2) the high salt concentration in the upper aquifer. The monitoring of the Ndelle rice growing area (30 km to the North-East of Saint-Louis) has allowed calculating water and salt budgets at the scale of the irrigation plot. The influence of the irrigation on the groundwater levels has also been studied.},
 year = {2020}
}

Copy | Download

TY  - JOUR
T1  - Hydrogeological Assessments of Impacts of Irrigation on Alluvial Water Table of Delta of Senegal River
AU  - Abdoul Aziz Gning
AU  - Alassane Thiam
AU  - Raymond Malou
AU  - Mapathé Ndiaye
Y1  - 2020/10/22
PY  - 2020
N1  - https://doi.org/10.11648/j.wros.20200905.13
DO  - 10.11648/j.wros.20200905.13
T2  - Journal of Water Resources and Ocean Science
JF  - Journal of Water Resources and Ocean Science
JO  - Journal of Water Resources and Ocean Science
SP  - 107
EP  - 122
PB  - Science Publishing Group
SN  - 2328-7993
UR  - https://doi.org/10.11648/j.wros.20200905.13
AB  - Building dams on the Senegal River has facilitated the development of irrigated farming in Delta of Senegal River. However, this practice is threatened by the increasing degradation of soils mainly caused by salinization. The main cause of this problem is the presence of a salty aquifer at a low depth. Nevertheless, the characteristics and functioning of this aquifer are not well known. The main objective of this study, funded by Wallonie-Brussels International, is a contribution to the characterization of the hydrodynamic functioning, the hydro geochemistry of the aquifer and to identify the impact on agricultural waters. A two-step methodology has been developed: Firstly, a regional survey has been performed in the whole delta; secondly an irrigation plot has been monitored to have a detailed description of the groundwater dynamic and of the transport of salt under irrigation. Results of the regional survey show (1) the main factors that explain the fluctuation of the groundwater level are the artificial high water levels in the River, rice growing and to a lesser extent precipitation and (2) the high salt concentration in the upper aquifer. The monitoring of the Ndelle rice growing area (30 km to the North-East of Saint-Louis) has allowed calculating water and salt budgets at the scale of the irrigation plot. The influence of the irrigation on the groundwater levels has also been studied.
VL  - 9
IS  - 5
ER  -

Copy | Download