SWAT developments and recommendations for modelling agricultural pesticide mitigation measures in river basins

Gevaert, Veerle; Griensven, Ann van; Holvoet, Katrijn; Seuntjens, Piet; Vanrolleghem, Peter A.

doi:10.1623/hysj.53.5.1075

Cited by 33 publications

(12 citation statements)

References 27 publications

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“…In reality, the trap efficiency will be different for storm and normal rainfall events; (b) a similar fraction is retained in the filter strip for each compound. In fact, there is a difference between dissolve and bound fractions, and between coarse and small particles; (c) the model considers a buffer strip for an entire hydrological response unit (HRU) and not only for the areas really situated along the river (Gevaert et al 2008). The above limitations may cause inaccurate results of prediction about the efficiency of the buffer strip.…”

Section: Field Buf Fer Stripmentioning

confidence: 99%

The impact of agricultural Best Management Practices on water quality in a North German lowland catchment

Lam

Schmalz

Fohrer

2011

Environ Monit Assess

149

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Research on water quality degradation caused by point and diffuse source pollution plays an important role in protecting the environment sustainably. Implementation of Best Management Practices (BMPs) is a conventional approach for controlling and mitigating pollution from diffuse sources. The objectives of this study were to assess the long-term impact of point and diffuse source pollution on sediment and nutrient load in a lowland catchment using the ecohydrological model Soil and Water Assessment Tool (SWAT) and to evaluate the cost and effectiveness of BMPs for water quality improvement in the entire catchment. The study area, Kielstau catchment, is located in the North German lowlands. The water quality is not only influenced by the predominating agricultural land use in the catchment as cropland and pasture, but also by six municipal wastewater treatment plants. Diffuse entries as well as punctual entries from the wastewater treatment plants are implemented in the model set-up. Results from model simulations indicated that the SWAT model performed satisfactorily in simulating flow, sediment, and nutrient load in a daily time step. Two approaches to structural and nonstructural BMPs have been recommended in relation to cost and effectiveness of BMPs in this study. These BMPs include extensive land use management, grazing management practice, field buffer strip, and nutrient management plan. The results showed that BMPs would reduce fairly the average annual load for nitrate and total nitrogen by 8.6% to 20.5%. However, the implementation of BMPs does not have much impact on reduction in the average annual load of sediment and total phosphorus at the main catchment outlet. The results obtained by implementing those BMPs ranged from 0.8% to 4.9% and from 1.1% to 5.3% for sediment and total phosphorus load reduction, respectively. This study also reveals that reduction only in one type of BMP did not achieve the target value for water quality according to the European Water Framework Directive. The combination of BMPs improved considerably water quality in the Kielstau catchment, achieving a 53.9% and a 46.7% load reduction in nitrate and total nitrogen load, respectively, with annual implementation cost of 93,000 Euro.

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Section: Field Buf Fer Stripmentioning

confidence: 99%

The impact of agricultural Best Management Practices on water quality in a North German lowland catchment

Lam

Schmalz

Fohrer

2011

Environ Monit Assess

149

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“…Although its use for nutrient and pesticide modelling is less documented in the literature than that for flow modelling (Tolson & Shoemaker, 2007), more material is becoming available (Santhi et al, 2001;Muleta & Nicklow, 2005;Srinivasan et al, 2005;Tolson & Shoemaker, 2007;Gevaert et al, 2008).…”

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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“…At present, SWAT is increasingly being used to assist watershed planning, with model applications becoming increasingly sophisticated in order to target critical pollutant source areas and practices. However, to date, applications in small basins have been limited (Bogena et al 2003; Gevaert et al 2008; Licciardello et al 2011) and a few studies have focused on applications including detailed soil information. According to Mukundan et al (2010), the effect of spatial resolution on soil data may not be relevant in large watersheds; however, it may be determinant/pronounced in small ones and so it may be appropriate to formulate and simulate land-use management strategies.…”

Section: Introductionmentioning

confidence: 99%

Soil water content, runoff and soil loss prediction in a small ungauged agricultural basin in the Mediterranean region using the Soil and Water Assessment Tool

Ramos

Martínez‐Casasnovas

2014

J. Agric. Sci.

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The aim of the present work was to evaluate the possibilities of using sub-basin data for calibration of the Soil and Water Assessment Tool (SWAT) model in a small (46 ha) ungauged basin (i.e. where the water flow is not systematically measured) and its response. This small basin was located in the viticultural Anoia-Penedès region (North-east Spain), which suffers severe soil erosion. The data sources were: daily weather data from an observatory located close to the basin; a detailed soil map of Catalonia; a 5-m resolution digital elevation model (DEM); a crop/land use map derived from orthophotos taken in 2010 and an additional detailed soil survey (40 points) within the basin, which included properties such as texture, soil organic carbon, electrical conductivity, bulk density and water retention capacity at −33 and −1500 kPa. A sensitivity analysis was performed to identify and rank the sensitive parameters that affect the hydrological response and sediment yield to changes of model input parameters. A 1-year calibration and 1-year validation were carried out on the basis of soil moisture measured at 0·20-m intervals from depths of 0·10 to 0·90 m in two selected sub-basins, and data related to estimations of runoff and sediment concentrations in runoff collected in the same sub-basins. The present paper shows a methodological approach for calibrating SWAT in small ungauged basins using soil water content measurements and runoff samples collected within the basin. The SWAT satisfactorily predicted the average soil water content, runoff and soil loss for moderate intensity events recorded during the study periods. However, it was not satisfactory for high-intensity events which would require exploring the possibilities of using sub-daily information as an input model parameter.

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SWAT developments and recommendations for modelling agricultural pesticide mitigation measures in river basins

Cited by 33 publications

References 27 publications

The impact of agricultural Best Management Practices on water quality in a North German lowland catchment

The impact of agricultural Best Management Practices on water quality in a North German lowland catchment

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

Soil water content, runoff and soil loss prediction in a small ungauged agricultural basin in the Mediterranean region using the Soil and Water Assessment Tool

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