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Natural vs. artificial groundwater recharge, quantification through inverse modeling

Hashemi, Hossein LU ; Berndtsson, Ronny LU ; Kompani-Zare, Mazda and Persson, Magnus LU (2013) In Hydrology and Earth System Sciences 17(2). p.637-650
Abstract
Estimating the change in groundwater recharge from an introduced artificial recharge system is important in order to evaluate future water availability. This paper presents an inverse modeling approach to quantify the recharge contribution from both an ephemeral river channel and an introduced artificial recharge system based on floodwater spreading in arid Iran. The study used the MODFLOW-2000 to estimate recharge for both steady and unsteady-state conditions. The model was calibrated and verified based on the observed hydraulic head in observation wells and model precision, uncertainty, and model sensitivity were analyzed in all modeling steps. The results showed that in a normal year without extreme events the floodwater spreading... (More)
Estimating the change in groundwater recharge from an introduced artificial recharge system is important in order to evaluate future water availability. This paper presents an inverse modeling approach to quantify the recharge contribution from both an ephemeral river channel and an introduced artificial recharge system based on floodwater spreading in arid Iran. The study used the MODFLOW-2000 to estimate recharge for both steady and unsteady-state conditions. The model was calibrated and verified based on the observed hydraulic head in observation wells and model precision, uncertainty, and model sensitivity were analyzed in all modeling steps. The results showed that in a normal year without extreme events the floodwater spreading system is the main contributor to recharge with 80% and the ephemeral river channel with 20% of total recharge in the studied area. Uncertainty analysis revealed that the river channel recharge estimation represents relatively more uncertainty in comparison to the artificial recharge zones. The model is also less sensitive to the river channel. The results show that by expanding the artificial recharge system the recharge volume can be increased even for small flood events while the recharge through the river channel increases only for major flood events. (Less)
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type
Contribution to specialist publication or newspaper
publication status
published
subject
categories
Higher Education
in
Hydrology and Earth System Sciences
volume
17
issue
2
pages
637 - 650
publisher
Copernicus Gesellschaft mbH
external identifiers
  • wos:000314802700014
  • scopus:84879116080
ISSN
1607-7938
DOI
10.5194/hess-17-637-2013
language
English
LU publication?
yes
additional info
Open Access Journal
id
59476902-196e-4c16-83be-bbd9d5631c17 (old id 3233582)
date added to LUP
2016-04-01 10:38:31
date last changed
2021-03-09 02:47:02
@misc{59476902-196e-4c16-83be-bbd9d5631c17,
  abstract     = {Estimating the change in groundwater recharge from an introduced artificial recharge system is important in order to evaluate future water availability. This paper presents an inverse modeling approach to quantify the recharge contribution from both an ephemeral river channel and an introduced artificial recharge system based on floodwater spreading in arid Iran. The study used the MODFLOW-2000 to estimate recharge for both steady and unsteady-state conditions. The model was calibrated and verified based on the observed hydraulic head in observation wells and model precision, uncertainty, and model sensitivity were analyzed in all modeling steps. The results showed that in a normal year without extreme events the floodwater spreading system is the main contributor to recharge with 80% and the ephemeral river channel with 20% of total recharge in the studied area. Uncertainty analysis revealed that the river channel recharge estimation represents relatively more uncertainty in comparison to the artificial recharge zones. The model is also less sensitive to the river channel. The results show that by expanding the artificial recharge system the recharge volume can be increased even for small flood events while the recharge through the river channel increases only for major flood events.},
  author       = {Hashemi, Hossein and Berndtsson, Ronny and Kompani-Zare, Mazda and Persson, Magnus},
  issn         = {1607-7938},
  language     = {eng},
  number       = {2},
  pages        = {637--650},
  publisher    = {Copernicus Gesellschaft mbH},
  series       = {Hydrology and Earth System Sciences},
  title        = {Natural vs. artificial groundwater recharge, quantification through inverse modeling},
  url          = {https://lup.lub.lu.se/search/ws/files/2017182/4139535.pdf},
  doi          = {10.5194/hess-17-637-2013},
  volume       = {17},
  year         = {2013},
}