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Segment-based assessment of riparian buffers on stream water quality improvement by applying an integrated model

Author

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  • Zhang, Chengfu
  • Li, Sheng
  • Jamieson, Rob C.
  • Meng, Fan-Rui

Abstract

As Best Management Practices, Riparian buffers are crucial to reduce pollutant loadings from upland area to streams. While fixed-width riparian buffer zones are relatively simple to be designed and implemented, variable-width buffer zones have the benefit to protect biogeochemical and ecological functions of riparian zones. With the variation of width, vegetation type, and topography, the filtering function of the riparian buffers could be varied from segment to segment along a stream. The developed REMM-SWAT interface could be used to assess riparian buffer zones at a segment level. This interface could obtain characteristics of each buffer segment and generate upland water and pollutants input, simulated with SWAT model, for each segment. From the modelling, the contribution of each segment in reducing sediment, nitrogen, and phosphorus varied drastically from one to another. The maximum reduction of runoff, sediment, nitrogen, and phosphorus for unit riparian buffer length was 3.83mm m-1 yr-1, 202.4kg m-1 yr-1, 1.01kg m-1 yr-1, and 132.49g m-1 yr-1, respectively. The minimum reduction of these pollutants was zero as there was no buffer drainage area for some buffer segments. As riparian buffers have numerous functions, the design of the buffers should comprehensively consider each of its function. This developed software could be applied as an assistant tool with other riparian buffer tools for varied-species and −width riparian buffer zones design.

Suggested Citation

  • Zhang, Chengfu & Li, Sheng & Jamieson, Rob C. & Meng, Fan-Rui, 2017. "Segment-based assessment of riparian buffers on stream water quality improvement by applying an integrated model," Ecological Modelling, Elsevier, vol. 345(C), pages 1-9.
    • Handle: RePEc:eee:ecomod:v:345:y:2017:i:c:p:1-9
    DOI: 10.1016/j.ecolmodel.2016.12.005
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    References listed on IDEAS

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    1. Aguiar Jr., T.R. & Rasera, K. & Parron, L.M. & Brito, A.G. & Ferreira, M.T., 2015. "Nutrient removal effectiveness by riparian buffer zones in rural temperate watersheds: The impact of no-till crops practices," Agricultural Water Management, Elsevier, vol. 149(C), pages 74-80.
    2. Shan, Nan & Ruan, Xiao-Hong & Xu, Jing & Pan, Zha-Rong, 2014. "Estimating the optimal width of buffer strip for nonpoint source pollution control in the Three Gorges Reservoir Area, China," Ecological Modelling, Elsevier, vol. 276(C), pages 51-63.
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