Estimation of Nitrogen Load with Multi-pollution Sources Using the SWAT Model: a Case Study in the Cau River Basin in Northern Vietnam

• Tran Viet-Bach

  Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu, Japan

• Ishidaira Hiroshi

  Interdisciplinary Centre for River Basin Environment, University of Yamanashi, Kofu, Japan

• Nakamura Takashi

  Interdisciplinary Centre for River Basin Environment, University of Yamanashi, Kofu, Japan

• Do Thu-Nga

  Faculty of Energy Technology, Electric Power University, Hanoi, Vietnam

• Nishida Kei

  Interdisciplinary Centre for River Basin Environment, University of Yamanashi, Kofu, Japan

抄録

Control of non-point source pollution, particularly in terms of nutrients, has advanced to a new phase where the identification of pollution sources and processes is necessary for complex river systems. The Soil and Water Assessment Tool (SWAT) is a process-based model that has been applied to manage aquatic environments in multiple river basins worldwide. In this study, nitrogen (N) loads from point and non-point pollution sources in the Cau River Basin, one of the three most polluted river basins in Vietnam, were simulated. Three scenarios with different combinations of pollution sources were developed to evaluate the major contributions of natural sources, cultivation, industry, households, craft villages and livestock in the study area. A set of hydrological and water quality parameters was successfully calibrated and validated with data observed over multiple years. The model results showed good performance in stream flow simulations at all four hydrological stations. The best performance for the N load simulation was under a scenario representing the dominant contribution of the non-point sources, which caused high amounts of N runoff and was likely triggered by rainfall. The modelling approach presented in this study provides an example for establishing a modelling platform for complex pollution systems.

収録刊行物

• Journal of Water and Environment Technology

  Journal of Water and Environment Technology 15 (3), 106-119, 2017

  公益社団法人 日本水環境学会

キーワード

• water quality modelling
• nitrogen load
• pollution sources
• scenario analysis
• Asian region

詳細情報

• CRID: 1390001205186987264
• NII論文ID: 130005697027
• DOI: 10.2965/jwet.16-052
• ISSN: 13482165
• Web Site: https://www.jstage.jst.go.jp/article/jwet/15/3/15_16-052/_pdf
• 本文言語コード: en
• データソース種別:
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