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Diffuse Surface Water Pollution: Driving Factors for Different Geoclimatic Regions

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  • Yiannis Panagopoulos
  • Christos Makropoulos
  • Maria Mimikou

Abstract

The quantification of point and non-point losses of Nitrogen (N) and Phosphorus (P) to surface waters is currently a major issue for the implementation of Environmental Directives, such as the Water Framework Directive in Europe. However, the drivers behind nutrient pollution are location specific and are affected by regional hydroclimatic and geomorphological characteristics. In this study the river basin model SWAT was used in order to improve the process-based understanding of mechanisms behind nutrient transport from land to water recipients in two European catchments with significantly different meteorological conditions: the Greek catchment of Ali Efenti, representative of the Mediterranean climate, and the Norwegian catchment of Vansjø-Hobølv, representative of the cold climate typical in Scandinavia. The models were firstly calibrated according to measured river flows and nutrient loads, and then four Best Management Practices (BMPs), related to nutrient application and soil management were applied in order to examine their effectiveness under the different geoclimatic conditions of the two catchments. The results of the baseline indicated that diffuse agricultural sources were the largest contributor of N losses in both catchments and of P losses in the Greek catchment, while point sources were significant contributors to P levels in Norwegian rivers. Nutrient losses to surface waters in Ali Efenti exhibited high seasonal variation, attributed to the extremeness of precipitation events that is typical in the Mediterranean, as well as to the temporal distribution of sediment losses to waters. On the other hand, in Scandinavia, the losses of N and P occurred with less deviation throughout the year and independently of the freezing of soils. The values of the calibrated parameters that mainly governed the hydrological and erosion processes in the catchments demonstrated the natural driving forces of nutrient losses to waters and their temporal distribution indicating that these forces are also crucial in determining the appropriate implementation of agricultural management practices in various geoclimatic regions. Copyright Springer Science+Business Media B.V. 2011

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  • Yiannis Panagopoulos & Christos Makropoulos & Maria Mimikou, 2011. "Diffuse Surface Water Pollution: Driving Factors for Different Geoclimatic Regions," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 25(14), pages 3635-3660, November.
  • Handle: RePEc:spr:waterr:v:25:y:2011:i:14:p:3635-3660
    DOI: 10.1007/s11269-011-9874-2
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    References listed on IDEAS

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    1. Lam, Q.D. & Schmalz, B. & Fohrer, N., 2010. "Modelling point and diffuse source pollution of nitrate in a rural lowland catchment using the SWAT model," Agricultural Water Management, Elsevier, vol. 97(2), pages 317-325, February.
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    2. Md Jahangir Alam & Dushmanta Dutta, 2016. "A Sub-Catchment Based Approach for Modelling Nutrient Dynamics and Transport at a River Basin Scale," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(14), pages 5455-5478, November.
    3. Anna Sperotto & Josè Luis Molina & Silvia Torresan & Andrea Critto & Manuel Pulido-Velazquez & Antonio Marcomini, 2019. "Water Quality Sustainability Evaluation under Uncertainty: A Multi-Scenario Analysis Based on Bayesian Networks," Sustainability, MDPI, vol. 11(17), pages 1-34, August.
    4. Ivan Lizaga & Borja Latorre & Leticia Gaspar & Ana Navas, 2020. "FingerPro: an R Package for Tracking the Provenance of Sediment," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 34(12), pages 3879-3894, September.
    5. Kazi Rahman & Chetan Maringanti & Martin Beniston & Florian Widmer & Karim Abbaspour & Anthony Lehmann, 2013. "Streamflow Modeling in a Highly Managed Mountainous Glacier Watershed Using SWAT: The Upper Rhone River Watershed Case in Switzerland," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(2), pages 323-339, January.
    6. Alam, Md Jahangir & Dutta, Dushmanta, 2012. "A process-based and distributed model for nutrient dynamics in river basin: Development, testing and applications," Ecological Modelling, Elsevier, vol. 247(C), pages 112-124.
    7. Everton Rocha & Maria Calijuri & Aníbal Santiago & Leonardo Assis & Luna Alves, 2012. "The Contribution of Conservation Practices in Reducing Runoff, Soil Loss, and Transport of Nutrients at the Watershed Level," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(13), pages 3831-3852, October.
    8. Xiaosi Su & Huang Wang & Yuling Zhang, 2013. "Health Risk Assessment of Nitrate Contamination in Groundwater: A Case Study of an Agricultural Area in Northeast China," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(8), pages 3025-3034, June.
    9. Amaya Novo & Joseba Bayon & Daniel Castro-Fresno & Jorge Rodriguez-Hernandez, 2013. "Temperature Performance of Different Pervious Pavements: Rainwater Harvesting for Energy Recovery Purposes," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(15), pages 5003-5016, December.

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