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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/nhess-2019-152
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2019-152
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 27 May 2019

Research article | 27 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Framework to prioritize watersheds for diffuse pollution management in Korea: application of multicriteria analysis using the Delphi method

Gyumin Lee1, Kyung Soo Jun2, and Minji Kang3 Gyumin Lee et al.
  • 1Construction and Environmental Research Center, Sungkyunkwan University, Suwon, 16419, Republic of Korea
  • 2Graduate School of Water Resources, Sungkyunkwan University, Suwon, 16419, Republic of Korea
  • 3Water Environment Policy Division, Ministry of Environment, Sejong, 30103, Republic of Korea

Abstract. This study aimed to develop a risk-based approach for determining control areas to manage non-point source pollution, developing a framework to prioritize catchments by considering the characteristics of polluted runoff from non-point sources. The best management, decision-making, and scientific approaches, such as TOPSIS and Delphi technique, are required for the designation of control areas and the application of the best management practices to the control areas. Multicriteria decision-making methods can handle the diversity and complexity of non-point source pollution. The Delphi technique was employed for selecting the assessment criteria/sub-criteria and determining their weights. Sub-criteria for each catchment unit were scored with either a quantitative or qualitative scale. All non-point pollution sources in South Korea mainland were included, with the exception of a few islands, with catchment prioritization and pollution vulnerability evaluations shown as thematic maps. This study contributes to the field by developing a new risk-based approach for ranking and prioritizing catchments; this provides valuable information for the Ministry of Environment to use to identify control areas and manage non-point source pollution.

Gyumin Lee et al.
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Gyumin Lee et al.
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Short summary
This study proposes a system for the scientific selection of evaluation indices and priority areas for non-point source control. We developed a framework to prioritize catchments in terms of the risk of non-point source pollution considering the characteristics of polluted runoff from a non-point source using a multi-criteria decision-making method.
This study proposes a system for the scientific selection of evaluation indices and priority...
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