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Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009

Limited water supply is one of the major restrictions in development and agricultural activities in numerous countries, especially in arid and semi-arid regions. Wetlands are constantly affected by anthropogenic factors such as engineering projects and landscaping. Therefore, simulation of hydrologi...

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Main Authors: Ghobadi, Yasser, Pradhan, Biswajeet, Sayyad, Gholam Abbas, Kabiri, Keivan, Falamarzi, Yashar
Format: Article
Language:English
Published: Elsevier 2015
Online Access:http://psasir.upm.edu.my/id/eprint/46290/1/Simulation%20of%20hydrological%20processes%20and%20effects%20of%20engineering%20projects%20on%20the%20Karkheh%20River%20Basin%20and%20its%20wetland%20using%20SWAT2009_new.pdf
http://psasir.upm.edu.my/id/eprint/46290/
https://www.sciencedirect.com/science/article/pii/S104061821500141X
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spelling my.upm.eprints.462902022-06-17T03:52:08Z http://psasir.upm.edu.my/id/eprint/46290/ Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009 Ghobadi, Yasser Pradhan, Biswajeet Sayyad, Gholam Abbas Kabiri, Keivan Falamarzi, Yashar Limited water supply is one of the major restrictions in development and agricultural activities in numerous countries, especially in arid and semi-arid regions. Wetlands are constantly affected by anthropogenic factors such as engineering projects and landscaping. Therefore, simulation of hydrologic processes and modeling the factors involved are important. In this study, Soil and Water Assessment Tool (SWAT) was used to simulate the hydrologic process in the Karkheh River Basin (KRB) in southwest Iran and to evaluate the impacts of engineering projects on its wetland (Al Hawizeh) located in the IraneIraq border. Calibration, validation, and uncertainty analysis were performed using Sequential Uncertainty Fitting Ver. 2 (SUFI2), which is one of the program interfaces with SWAT, in the Package SWAT Calibration Uncertainty Programs (SWAT-CUP). To assess the goodness of calibration and validation, four measures were applied: (i) percentage of data bracketed by 95% prediction uncertainty or P-factor (95PPU) calculated at 2.5% and 97.5% intervals of the simulated variables, (ii) R-factor, which is the ratio of average thickness of the PPU, (iii) NasheSutcliffe coefficient (NSE), and (iv) determination of coefficient (R2). Stream flows from four gauge stations combined with 14 synoptic stations were used for calibration (1987e1990) and validation (1991e1994). The P-factor values for these stations ranged from 0.64 to 0.84 and from 0.65 to 0.79 for calibration and validation, respectively. These results showed reasonable accuracy according to literature. NSE values were also acceptable, ranging from 0.52 to 0.8 and from 0.62 to 0.72 for calibration and validation, respectively. R2 values were also within an acceptable range. The calibration and validation results were then used to simulate two watershed scenarios (with and without a dam). In addition, annual flow volumes (AFVs) for two downstream stations (Hamidiyeh and Pay e Pol) were computed. AFV is defined as the volume of water that discharges from catchment at the desired output during a year. The results showed that the flows during 1987e2000 (before dam construction) and 2001 to 2010 (after dam construction) were significantly reduced after the Karkheh dam construction. The corresponding AFVs for the Hamidiyeh and Pay e Pol stations were 8.92 x 1011 and 1.04 x 1012 m3 in 1987e2000 and 2.57 x 1011 to 3.94 x 1011 m3 in 2001e2010. Thus, the AFVs before and after dam construction were reduced to 6.34 1011 and 6.53 x 1011 m3 for the Hamidiyeh and Pay e Pol gauges, respectively. Consequently, flow reduction affected the wetland area, in which the surface area of the wetland was reduced and dust emission was increased. Elsevier 2015-07 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/46290/1/Simulation%20of%20hydrological%20processes%20and%20effects%20of%20engineering%20projects%20on%20the%20Karkheh%20River%20Basin%20and%20its%20wetland%20using%20SWAT2009_new.pdf Ghobadi, Yasser and Pradhan, Biswajeet and Sayyad, Gholam Abbas and Kabiri, Keivan and Falamarzi, Yashar (2015) Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009. Quaternary International, 374. pp. 144-153. ISSN 1040-6182; ESSN: 1873-4553 https://www.sciencedirect.com/science/article/pii/S104061821500141X 10.1016/j.quaint.2015.02.034
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Limited water supply is one of the major restrictions in development and agricultural activities in numerous countries, especially in arid and semi-arid regions. Wetlands are constantly affected by anthropogenic factors such as engineering projects and landscaping. Therefore, simulation of hydrologic processes and modeling the factors involved are important. In this study, Soil and Water Assessment Tool (SWAT) was used to simulate the hydrologic process in the Karkheh River Basin (KRB) in southwest Iran and to evaluate the impacts of engineering projects on its wetland (Al Hawizeh) located in the IraneIraq border. Calibration, validation, and uncertainty analysis were performed using Sequential Uncertainty Fitting Ver. 2 (SUFI2), which is one of the program interfaces with SWAT, in the Package SWAT Calibration Uncertainty Programs (SWAT-CUP). To assess the goodness of calibration and validation, four measures were applied: (i) percentage of data bracketed by 95% prediction uncertainty or P-factor (95PPU) calculated at 2.5% and 97.5% intervals of the simulated variables, (ii) R-factor, which is the ratio of average thickness of the PPU, (iii) NasheSutcliffe coefficient (NSE), and (iv) determination of coefficient (R2). Stream flows from four gauge stations combined with 14 synoptic stations were used for calibration (1987e1990) and validation (1991e1994). The P-factor values for these stations ranged from 0.64 to 0.84 and from 0.65 to 0.79 for calibration and validation, respectively. These results showed reasonable accuracy according to literature. NSE values were also acceptable, ranging from 0.52 to 0.8 and from 0.62 to 0.72 for calibration and validation, respectively. R2 values were also within an acceptable range. The calibration and validation results were then used to simulate two watershed scenarios (with and without a dam). In addition, annual flow volumes (AFVs) for two downstream stations (Hamidiyeh and Pay e Pol) were computed. AFV is defined as the volume of water that discharges from catchment at the desired output during a year. The results showed that the flows during 1987e2000 (before dam construction) and 2001 to 2010 (after dam construction) were significantly reduced after the Karkheh dam construction. The corresponding AFVs for the Hamidiyeh and Pay e Pol stations were 8.92 x 1011 and 1.04 x 1012 m3 in 1987e2000 and 2.57 x 1011 to 3.94 x 1011 m3 in 2001e2010. Thus, the AFVs before and after dam construction were reduced to 6.34 1011 and 6.53 x 1011 m3 for the Hamidiyeh and Pay e Pol gauges, respectively. Consequently, flow reduction affected the wetland area, in which the surface area of the wetland was reduced and dust emission was increased.
format Article
author Ghobadi, Yasser
Pradhan, Biswajeet
Sayyad, Gholam Abbas
Kabiri, Keivan
Falamarzi, Yashar
spellingShingle Ghobadi, Yasser
Pradhan, Biswajeet
Sayyad, Gholam Abbas
Kabiri, Keivan
Falamarzi, Yashar
Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009
author_facet Ghobadi, Yasser
Pradhan, Biswajeet
Sayyad, Gholam Abbas
Kabiri, Keivan
Falamarzi, Yashar
author_sort Ghobadi, Yasser
title Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009
title_short Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009
title_full Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009
title_fullStr Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009
title_full_unstemmed Simulation of hydrological processes and effects of engineering projects on the Karkheh River Basin and its wetland using SWAT2009
title_sort simulation of hydrological processes and effects of engineering projects on the karkheh river basin and its wetland using swat2009
publisher Elsevier
publishDate 2015
url http://psasir.upm.edu.my/id/eprint/46290/1/Simulation%20of%20hydrological%20processes%20and%20effects%20of%20engineering%20projects%20on%20the%20Karkheh%20River%20Basin%20and%20its%20wetland%20using%20SWAT2009_new.pdf
http://psasir.upm.edu.my/id/eprint/46290/
https://www.sciencedirect.com/science/article/pii/S104061821500141X
_version_ 1736835680231751680
score 13.211869

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