Application of the SWAT model on the Medjerda river basin (Tunisia)

Bouraoui, F.; Benabdallah, Sihem; Jrad, Amel; Bidoglio, G.

doi:10.1016/j.pce.2005.07.004

Cited by 145 publications

(85 citation statements)

References 11 publications

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“…Medjerda river basin accounts for about 80 % of the total surface water resources (Bouraoui et al 2005). It is used for the irrigation of cultivated land which covers an area of 33,173 ha.…”

Section: Study Areamentioning

confidence: 99%

Hydrochemical assessment of water quality for irrigation: a case study of the Medjerda River in Tunisia

2015

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In order to characterize, classify and evaluate the suitability of Medjerda River water for irrigation, a hydrochemical assessment was conducted. It accounts for 80 % of the total Tunisian surface water. In this paper, hydrographical methods and PHREEQC geochemical program were used to characterize water quality of Medjerda River, whereas its suitability for irrigation was determined in accordance with its electrical conductivity (EC), sodium adsorption ratio (SAR) and sodium concentrations. It was established that the water samples were undersaturated with calcite, dolomite, aragonite, anhydrite, gypsum and halite except in one water sample which is supersaturated with carbonate minerals. The quality assessment of Medjerda River for irrigation purposes showed that some points belonged to the excellent-to-good and good-to-permissible irrigation water categories, while the remaining ones were classified as doubtful to unsuitable for irrigation making the river water use limited to plants with high salt tolerance. Moreover, based on FAO guidelines, almost all water samples may cause immediate salinity to gradual increasing problem but no soil infiltration problems except for two sampling points. However, immediate development or possible increasing of severe toxicity problems may be caused by the continuous use of this water for irrigation due to troublesome concentrations of chloride and sodium.

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Section: Study Areamentioning

confidence: 99%

Hydrochemical assessment of water quality for irrigation: a case study of the Medjerda River in Tunisia

2015

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“…These rivers often constitute the only available water resource in semi-arid countries and, hence, are vulnerable to diffuse and point-source pollution. To assess these impacts quantitatively, several studies have used coupled hydrological and water quality models (Bouraoui et al, 2005;Plus et al, 2006;Tournoud et al, 2006).…”

Section: Flow and Nutrient Transport In Intermittent Riversmentioning

confidence: 99%

Flow and nutrient transport in intermittent rivers: a modelling case-study on the Vène River using SWAT 2005

Chahinian

Tournoud

Perrin

et al. 2011

Hydrological Sciences Journal

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Intermittent rivers have a specific hydrological behaviour which also influences water quality dynamics. The objective of this work was to model the flow and water quality dynamics of a coastal Mediterranean intermittent river using the Soil and Water Assessment Tool (SWAT 2005). Flow, sediment, nitrogen and phosphorus transport were simulated on the Vène experimental catchment, France. The model was sequentially calibrated at sub-catchment scale and validated both at sub-catchment and catchment scales. A procedure for building the data records for the point sources is presented. The results indicate that, while the model produces good results for flow simulation, its performance for sediment transport is less satisfactory. This in turn impacts on the nutrient transport module. The reasons behind these shortcomings are analysed, taking into account the length of the data records, their distribution and the equations used in the SWAT model. The need for a thorough multi-objective model validation is illustrated. Une procédure de reconstitution des séries temporelles relatives aux rejets ponctuels est présentée. Bien que le modèle donne de bons résultats pour la simulation des débits, les résultats indiquent que sa performance pour le transport des sédiments est moins satisfaisante. Ceci influence à son tour le module de transport des nutriments. Les raisons derrière ces limitations sont analysées en tenant compte de la longueur des séries de données, leurs distributions et les équations utilisées dans le modèle SWAT. La nécessité d'avoir recours à une validation multi-critère approfondie du modèle est illustrée.

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“…Based on these results, we set up typical scenarios to evaluate the reduction effects of NPS pollution control measures. The scenario analysis both assesses the influence of various management strategies on water quality [78] and enables the selection of the best management practices for the implementation of total maximum daily loads (TMDLs) [79]. According to the results of the regional division and the characteristics of pollution sources in the different regions discussed above, in this study, measures for controlling NPS-N and NPS-P are divided into three parts, namely the management of livestock and the rural population, farmland and fertilizer losses and soil erosion.…”

Section: Measures For Nps Pollution Controlmentioning

confidence: 99%

Non-Point Source Nitrogen and Phosphorus Assessment and Management Plan with an Improved Method in Data-Poor Regions

Chen

Liu

Peng

et al. 2017

Water

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Abstract:To enhance the quantitative simulation and integrated assessment of non-point source (NPS) pollution in plateau lakes in data-poor regions, a simple and practical NPS assessment method is developed by combining the improved export coefficient model (ECM) and the revised universal soil loss equation (RUSLE). This method is evaluated via application to the Chenghai Lake watershed (Yunnan Province, China), which contains a typical plateau lake. The estimated results reflect the actual situation within the watershed. The total nitrogen (TN) and total phosphorus (TP) loads in the study area in 2014 were 360.35 t/a (44.30% dissolved nitrogen (DN) and 55.70% adsorbed nitrogen (AN)) and 86.15 t/a (71.40% adsorbed phosphorus (AP)), respectively. The southern and eastern portions of the watershed are key regions for controlling dissolved and adsorbed pollutants, respectively. Soil erosion and livestock are the main TN and TP pollution sources in the study area and should be controlled first. Additionally, reasonable and practical suggestions are proposed to minimize water pollution according to a scenario analysis. The method in this study provides a foundation for scientific theories that can be used in water resources protection planning and the method can be applied to the NPS assessment of similar regions with scarce data.

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Application of the SWAT model on the Medjerda river basin (Tunisia)

Cited by 145 publications

References 11 publications

Hydrochemical assessment of water quality for irrigation: a case study of the Medjerda River in Tunisia

Hydrochemical assessment of water quality for irrigation: a case study of the Medjerda River in Tunisia

Flow and nutrient transport in intermittent rivers: a modelling case-study on the Vène River using SWAT 2005

Non-Point Source Nitrogen and Phosphorus Assessment and Management Plan with an Improved Method in Data-Poor Regions

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